2024/11/13 更新

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写真a

ヤマサキ ユウゾウ
山崎 誘三
YAMASAKI YUZO
所属
九州大学病院 放射線部 助教
九州大学病院 放射線科(併任)
医学部 医学科(併任)
職名
助教
プロフィール
<研究> ①循環器画像診断  主にCTやMRIを用いた虚血性心疾患、心筋症、肺高血圧、先天性心疾患など多岐にわたる疾患の非侵襲的診断法の確立 ②胸部画像診断  肺癌やリンパ節転移などに対するより精度の高い診断法の開発、動態撮影を用いた新たな肺血流評価法の開発 ③乳腺、骨軟部、頭頸部画像診断  高精細CTや二層検出器CTを用いたより精度の高い腫瘍深達度診断 <臨床> 九州大学病院にて放射線科診断専門医として、胸部・骨軟部・頭頸部・乳腺・心大血管疾患の画像診断に関連した業務を担っている。特に心大血管疾患に関しては撮影方法の決定から読影まで中心的役割を果たしている。また、IVRも積極的に行っており、肺疾患に対するCTガイド下生検、頭頸部癌に対する動注化学療法を施行者もしくは指導者として担当している。 各診療科と行われる、以下のカンファレンスを担当している。下記以外にも適宜各診療科との連携をとっている。 ・月曜午前(毎週):乳腺カンファレンス ・火曜午後(毎週):外科術前カンファレンス ・水曜午後(毎週):耳鼻科カンファレンス ・水曜午後(毎月):循環器カンファレンス ・金曜午前(毎週):呼吸器カンファレンス 2019年度 外来医長 2021年度 副病棟医長 <教育> ①医学部6年生のクリニカルクラークシップにおける講義、研修成果発表会の指導 読影室にて実際の単純写真、CT、MRIを使用して、代表的な症例の読影を行ってもらう。その後、一緒に画像を供覧しながら、撮影における注意点、画像所見のとり方、解釈の仕方などを踏まえながら、読影を指導している。また一ヶ月の研修期間中に一つテーマを決め、そのテーマに対して深く学習し、まとめのスライドを作成してもらい、画像診断への理解を深めてもらっている。まとめた内容は研修終了前の研修成果発表会にて発表してもらっている。 ②臨床研修医の読影指導 読影室にて日々の症例の一時読影を行ってもらう。その後、一緒に画像を供覧しながら、撮影における注意点、画像所見のとり方、解釈の仕方などを踏まえながら、読影を指導している。また、毎週木曜午後にその週にあった教育的な症例を供覧し、画像所見の解説を行っている。
外部リンク

学位

  • 医学博士

研究テーマ・研究キーワード

  • 研究テーマ: 胸部X線動態撮影の循環器、呼吸器疾患へ応用

    研究キーワード: 胸部X線動態撮影

    研究期間: 2018年5月 - 2026年5月

  • 研究テーマ: 循環器画像診断の研究

    研究キーワード: 心大血管CT・MRI

    研究期間: 2010年7月 - 2029年7月

受賞

  • RSNA 2022 Education Exhibit Award Cum Laude

    2022年11月   Radiological Society of North America   Dynamic Chest Radiography for Pulmonary Vascular Diseases: Clinical Applications and Correlation with Other Imaging Modalities

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  • 第34回日本医学放射線学会優秀論文賞

    2022年4月   日本医学放射線学会   Right Ventricular Extracellular Volume with Dual-Layer Spectral Detector CT: Value in Chronic Thromboembolic Pulmonary Hypertension

    Yuzo Yamasaki, Kohtaro Abe, Takeshi Kamitani, Koji Sagiyama, Tomoyuki Hida, Kazuya Hosokawa, Yuko Matsuura, Kazuhito Hioki, Michinobu Nagao, Hidetake Yabuuchi, Kousei Ishigami

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  • Top 2023 Images in Cardiothoracic Imaging: first runner-up

    2023年11月   Radiology: Cardiothoracic Imaging   Dynamic Chest Radiography of Acute Pulmonary Thromboembo- lism

  • Top 2023 Images in Cardiothoracic Imaging: first runner-up

    2023年11月   Radiology: Cardiothoracic Imaging   Dynamic Chest Radiography of Acute Pulmonary Thromboembo- lism

    Yuzo Yamasaki, Kazuya Hosokawa, Kohtaro Abe, Kousei Ishigami

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  • Best poster award

    2023年9月   International CTEPH Conference   Dynamic chest radiography is a novel modality to detect pulmonary perfusion defects in patients with CTEPH

  • Best poster award

    2023年9月   International CTEPH Conference   Dynamic chest radiography is a novel modality to detect pulmonary perfusion defects in patients with CTEPH

    Kohtaro Abe, Kazuya Hosokawa, Yuzo Yamasaki

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  • 学会奨励賞

    2023年6月   第8回日本肺高血圧・肺循環学会   最新画像診断手法を用いた CTEPH 診断法、評価法の開発

  • 学会奨励賞

    2023年6月   第8回日本肺高血圧・肺循環学会   最新画像診断手法を用いた CTEPH 診断法、評価法の開発

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  • RSNA 2022 Education Exhibit Award Cum Laude

    2022年11月   Radiological Society of North America   Dynamic Chest Radiography for Pulmonary Vascular Diseases: Clinical Applications and Correlation with Other Imaging Modalities

  • 第34回日本医学放射線学会優秀論文賞

    2022年4月   日本医学放射線学会   Right Ventricular Extracellular Volume with Dual-Layer Spectral Detector CT: Value in Chronic Thromboembolic Pulmonary Hypertension

  • 第34回日本医学放射線学会優秀論文賞

    2022年4月   日本医学放射線学会   Right Ventricular Extracellular Volume with Dual-Layer Spectral Detector CT: Value in Chronic Thromboembolic Pulmonary Hypertension

  • 第80回日本医学放射線学会総会Cypos賞

    2021年4月   日本医学放射線学会  

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    Evaluation of Lung Perfusion by Dynamic Chest Radiography in Chronic Thromboembolic Pulmonary Hypertension: Comparison with Lung Perfusion Scintigraphy

  • 第85回日本循環器学会学術集会/World Congress of Cardiology 2021 循環器臨床研究奨励賞 最優秀賞

    2021年3月   日本循環器学会/World Congress of Cardiology  

  • コニカミノルタ画像科学奨励賞

    2021年3月   公益財団法人コニカミノルタ科学技術振興財団  

  • 日本医学放射線学会Bayer研究助成賞

    2020年4月   日本医学放射線学会  

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    二層検出器CTと人工知能を用いた三次元的な定量的心筋線維化評価法の開発

  • 症例検討優秀者表彰(1位)

    2020年1月   日本心臓血管放射線研究会  

  • 症例検討優秀者表彰(1位)

    2019年7月   日本心臓血管放射線研究会  

  • 日本医学放射線学会栗林研究奨励賞

    2019年4月   日本医学放射線学会  

  • 入江賞

    2018年12月   九州大学放射線科同門会  

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    One-stop shop assessment for atrial septal defect closure using 256-slice coronary CT angiography

  • 日本心臓血管放射線研究会学術助成賞

    2017年1月   日本心臓血管放射線研究会  

  • Young Investigator Award

    2016年1月   日本心血管画像動態学会  

  • ISMRM travel award

    2015年5月   日本磁気共鳴医学会  

  • Certificate of Merit

    2015年3月   European Congress of Radiology   Utility of diffusion tensor imaging in predicting pathological T-factor in breast cancer showing nonmasslike-enhancement on breast MRI

▼全件表示

論文

  • Diagnostic accuracy and added value of dynamic chest radiography in detecting pulmonary embolism: A retrospective study

    Yamasaki, Y; Hosokawa, K; Kamitani, T; Abe, K; Sagiyama, K; Hino, T; Ikeda, M; Nishimura, S; Toyoda, H; Moriyama, S; Kawakubo, M; Matsutani, N; Yabuuchi, H; Ishigami, K

    EUROPEAN JOURNAL OF RADIOLOGY OPEN   13   100602   2024年12月   ISSN:2352-0477 eISSN:2352-0477

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    記述言語:英語   出版者・発行元:European Journal of Radiology Open  

    Purpose: This study aimed to assess the diagnostic performance of dynamic chest radiography (DCR) and investigate its added value to chest radiography (CR) in detecting pulmonary embolism (PE). Methods: Of 775 patients who underwent CR and DCR in our hospital between June 2020 and August 2022, individuals who also underwent contrast-enhanced CT (CECT) of the chest within 72 h were included in this study. PE or non-PE diagnosis was confirmed by CECT and the subsequent clinical course. The enrolled patients were randomized into two groups. Six observers, including two thoracic radiologists, two cardiologists, and two radiology residents, interpreted each chest radiograph with and without DCR using a crossover design with a washout period. Diagnostic performance was compared between CR with and without DCR in the standing and supine positions. Results: Sixty patients (15 PE, 45 non-PE) were retrospectively enrolled. The addition of DCR to CR significantly improved the sensitivity, specificity, accuracy, and area under the curve (AUC) in the standing (35.6–70.0 % [P < 0.0001], 84.8–93.3 % [P = 0.0010], 72.5–87.5 % [P < 0.0001], and 0.66–0.85 [P < 0.0001], respectively) and supine (33.3–65.6 % [P < 0.0001], 78.5–92.2 % [P < 0.0001], 67.2–85.6 % [P < 0.0001], and 0.62–0.80 [P = 0.0002], respectively) positions for PE detection. No significant differences were found between the AUC values of DCR with CR in the standing and supine positions (P = 0.11) or among radiologists, cardiologists, and radiology residents (P = 0.14–0.68). Conclusions: Incorporating DCR with CR demonstrated moderate sensitivity, high specificity, and high accuracy in detecting PE, all of which were significantly higher than those achieved with CR alone, regardless of scan position, observer expertise, or experience.

    DOI: 10.1016/j.ejro.2024.100602

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  • Different Impact of Immunosuppressive Therapy on Cardiac Outcomes in Systemic Versus Isolated Cardiac Sarcoidosis

    Masunaga T., Hashimoto T., Fujino T., Ohtani K., Ishikawa Y., Yoshitake T., Shinohara K., Matsushima S., Ide T., Yamasaki Y., Isoda T., Baba S., Ishigami K., Tsutsui H., Kinugawa S.

    International Heart Journal   65 ( 5 )   856 - 865   2024年9月   ISSN:13492365 eISSN:13493299

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:一般社団法人 インターナショナル・ハート・ジャーナル刊行会  

    Isolated cardiac sarcoidosis (iCS) is increasingly recognized; however, its prognosis and the efficacy of immunosuppressive therapy remain undetermined. We aimed to compare the prognosis of iCS and systemic sarcoidosis including cardiac involvement (sCS) under immunosuppressive therapy. We retrospectively reviewed the clinical data of 42 patients with sCS and 30 patients with iCS diagnosed at Kyushu University Hospital from 2004 through 2022. We compared the characteristics and the rate of adverse cardiac events including cardiac death, fatal ventricular tachyarrhythmia, and heart failure hospitalization between the 2 groups. The median follow-up time was 1535 [interquartile range, 630-2555] days, without a significant difference between the groups. There were no significant differences in gender, NYHA class, or left ventricular ejection fraction. Immunosuppressive agents were administered in 86% of sCS and in 73% of iCS patients (P = 0.191). When analyzed only with patients receiving immunosuppressive therapy (sCS, n = 36; iCS, n = 21), the cardiac event-free survival was significantly lower in iCS than sCS (37% versus 79%, P = 0.002). Myocardial LGE content at the initial diagnosis was comparable in both groups. The disease activity was serially evaluated in 26 sCS and 16 iCS patients by quantitative measures of FDG-PET including cardiac metabolic volume and total lesion glycolysis, representing 3-dimensional distribution and intensity of inflammation in the entire heart. Although iCS patients had lower baseline disease activity than sCS patients, immunosuppressive therapy did not attenuate disease activity in iCS in contrast to sCS. iCS showed a poorer response to immunosuppressive therapy and a worse cardiac prognosis compared to sCS despite lower baseline disease activity.

    DOI: 10.1536/ihj.24-166

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  • Violation of the two-time Leggett-Garg inequalities for a harmonic oscillator

    Hatakeyama, K; Miki, D; Tani, M; Yamasaki, Y; Iso, S; Adam, AS; Rohim, A; Yamamoto, K

    PHYSICAL REVIEW A   110 ( 1 )   2024年7月   ISSN:2469-9926 eISSN:2469-9934

  • Influence of cardiac cycle on myocardial extracellular volume fraction measurements with dual-layer computed tomography 国際誌

    Nishigake, D; Yamasaki, Y; Hida, T; Shirasaka, T; Funatsu, R; Kato, T; Ishigami, K

    QUANTITATIVE IMAGING IN MEDICINE AND SURGERY   14 ( 7 )   4714 - 4722   2024年7月   ISSN:2223-4292 eISSN:2223-4306

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Quantitative Imaging in Medicine and Surgery  

    Background: In cardiac computed tomography (CT), the best image quality is obtained at mid-diastole at low heart rates (HRs) and at end-systole at high HRs. On the other hand, extracellular volume (ECV) measurements may be influenced by the cardiac phase. Therefore, we aimed to clarify the influence of the cardiac phase on the image quality and ECV values obtained using dual-layer spectral computed tomography (DLCT). Methods: Fifty-five patients (68.0±14.5 years; 26 men) with cardiac diseases who underwent retrospective electrocardiogram-gated myocardial CT delayed enhancement (CTDE) between February 2019 to April 2022 were enrolled. The ECVs at the right ventricle (RV) and left ventricle (LV) walls in the end-systolic and mid-diastolic phases were calculated using iodine-density measurements from CTDE spectral data. Iodine-density image quality was classified on a 4-point scale. ECV and image quality across cardiac phases were compared using the t-test and Wilcoxon signed-rank test, respectively. Inter- and intraobserver variability were evaluated using intraclass correlation coefficient (ICC) values. Results: The ECV of the septal regions during mid-diastole was significantly higher than that during end-systole. Other regions showed similar ECV measurements in both groups (P=0.13–0.97), except for the LV anterior wall and LV posterior wall at the base-ventricular level. The image-quality score in end-systole was significantly higher than that in mid-diastole (systole vs. diastole: 3.6±0.5 vs. 3.2±0.7; P=0.0195). Intra- and interobserver variabilities for RV ECV measurements at the end-systolic phase were superior to those at the mid-diastolic phase, whereas the corresponding values for LV ECV measurements were similar. Conclusions: Septal ECV showed small but significant differences while other region ECV showed no difference during the cardiac cycle. RV ECV measurements in the end-systolic phase were more reproducible than those in the mid-diastolic phase.

    DOI: 10.21037/qims-23-1647

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  • Detour canal, a civil engineering heritage created through historical struggle for water resources, now provides the habitats for a rare freshwater fish

    Yamasaki, Y; Hayashi, H; Kubo, S; Namiki, T; Kano, Y

    BIODIVERSITY DATA JOURNAL   12   e119517   2024年6月   ISSN:1314-2836 eISSN:1314-2828

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  • Internal 1000 au Scale Structures of the R CrA Cluster-forming Cloud. I. Filamentary Structures

    Tachihara, K; Fukaya, N; Tokuda, K; Yamasaki, Y; Nishioka, T; Abe, D; Inoue, T; Harada, N; Shoshi, A; Nozaki, S; Sato, A; Omura, M; Fujishiro, K; Fukagawa, M; Machida, MN; Kanai, T; Oasa, Y; Onishi, T; Saigo, K; Fukui, Y

    ASTROPHYSICAL JOURNAL   968 ( 2 )   2024年6月   ISSN:0004-637X eISSN:1538-4357

  • Clinical Characteristics of Cryopyrin-Associated Periodic Syndrome and Long-Term Real-World Efficacy and Tolerability of Canakinumab in Japan: Results of a Nationwide Survey

    Miyamoto, T; Izawa, K; Masui, S; Yamazaki, A; Yamasaki, Y; Matsubayashi, T; Shiraki, M; Ohnishi, H; Yasumura, J; Kawabe, T; Miyamae, T; Matsubara, T; Arakawa, N; Ishige, T; Takizawa, T; Shimbo, A; Shimizu, M; Kimura, N; Maeda, Y; Maruyama, Y; Shigemura, T; Furuta, J; Sato, S; Tanaka, H; Izumikawa, M; Yamamura, M; Hasegawa, T; Kaneko, H; Nakagishi, Y; Nakano, N; Iida, Y; Nakamura, T; Wakiguchi, H; Hoshina, T; Kawai, T; Murakami, K; Akizuki, S; Morinobu, A; Ohmura, K; Eguchi, K; Sonoda, M; Ishimura, M; Furuno, K; Kashiwado, M; Mori, M; Kawahata, K; Hayama, K; Shimoyama, K; Sasaki, N; Ito, T; Umebayashi, H; Omori, T; Nakamichi, S; Dohmoto, T; Hasegawa, Y; Kawashima, H; Watanabe, S; Taguchi, Y; Nakaseko, H; Iwata, N; Kohno, H; Ando, T; Ito, Y; Kataoka, Y; Saeki, T; Kaneko, U; Murase, A; Hattori, S; Nozawa, T; Nishimura, K; Nakano, R; Watanabe, M; Yashiro, M; Nakamura, T; Komai, T; Kato, K; Honda, Y; Hiejima, E; Yonezawa, A; Bessho, K; Okada, S; Ohara, O; Takita, J; Yasumi, T; Nishikomori, R

    ARTHRITIS & RHEUMATOLOGY   76 ( 6 )   949 - 962   2024年6月   ISSN:2326-5191 eISSN:2326-5205

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    記述言語:英語  

    DOI: 10.1002/art.42808

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  • Violation of the two-time Leggett-Garg inequalities for a coarse-grained quantum field

    Tani, M; Hatakeyama, K; Miki, D; Yamasaki, Y; Yamamoto, K

    PHYSICAL REVIEW A   109 ( 3 )   2024年3月   ISSN:2469-9926 eISSN:2469-9934

  • Dynamic chest radiography for pulmonary vascular diseases: clinical applications and correlation with other imaging modalities

    Yamasaki, Y; Kamitani, T; Sagiyama, K; Hino, T; Kisanuki, M; Tabata, K; Isoda, T; Kitamura, Y; Abe, K; Hosokawa, K; Toyomura, D; Moriyama, S; Kawakubo, M; Yabuuchi, H; Ishigami, K

    JAPANESE JOURNAL OF RADIOLOGY   42 ( 2 )   126 - 144   2024年2月   ISSN:1867-1071 eISSN:1867-108X

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    記述言語:英語   出版者・発行元:Japanese Journal of Radiology  

    Dynamic chest radiography (DCR) is a novel functional radiographic imaging technique that can be used to visualize pulmonary perfusion without using contrast media. Although it has many advantages and clinical utility, most radiologists are unfamiliar with this technique because of its novelty. This review aims to (1) explain the basic principles of lung perfusion assessment using DCR, (2) discuss the advantages of DCR over other imaging modalities, and (3) review multiple specific clinical applications of DCR for pulmonary vascular diseases and compare them with other imaging modalities.

    DOI: 10.1007/s11604-023-01483-2

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  • Dynamic chest radiography: moving from basic research to clinical application 国際誌

    Yamasaki, Y; Hino, T

    JOURNAL OF THORACIC DISEASE   15 ( 12 )   7155 - 7158   2023年12月   ISSN:2072-1439 eISSN:2077-6624

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    記述言語:英語   出版者・発行元:Journal of Thoracic Disease  

    DOI: 10.21037/jtd-23-1403

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  • New Path and Remaining Issues in Clinical Applications of Dynamic Chest Radiography

    Yamasaki, Y

    CIRCULATION JOURNAL   88 ( 1 )   168 - 169   2023年12月   ISSN:13469843 eISSN:13474820

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:一般社団法人 日本循環器学会  

    DOI: 10.1253/circj.CJ-23-0853

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  • 特集 全身の血栓症・塞栓症を考える 肺動脈血栓症・塞栓症

    山崎 誘三, 神谷 武志, 鷺山 幸二, 日野 卓也, 田畑 公佑, 木佐貫 恵, 藪内 英剛, 石神 康生

    画像診断   43 ( 14 )   1379 - 1389   2023年11月   ISSN:02850524 eISSN:24321281

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    出版者・発行元:学研メディカル秀潤社  

    DOI: 10.15105/gz.0000005005

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  • Refined scan protocol for the evaluation of pulmonary perfusion standardized image quality and reduced radiation dose in dynamic chest radiography 国際誌

    Takakura, K; Yamasaki, Y; Kuramoto, T; Yoshidome, S; Hida, T; Kamitani, T; Yoshikawa, H; Kato, T; Ishigami, K

    JOURNAL OF APPLIED CLINICAL MEDICAL PHYSICS   25 ( 1 )   e14222   2023年11月   ISSN:1526-9914

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Journal of Applied Clinical Medical Physics  

    PURPOSE: Dynamic chest radiography (DCR) is a novel imaging technique used to noninvasively evaluate pulmonary perfusion. However, the standard DCR protocol, which is roughly adapted to the patient's body size, occasionally causes over- or underexposure, which could influence clinical evaluation. Therefore, we proposed a refined protocol by increasing the number of patient body mass index (BMI) categories from three to seven groups and verified its usefulness by comparing the image sensitivity indicators (S-values) and entrance surface doses (ESDs) of the conventional protocol with those of our refined protocol. METHODS: This retrospective observational study included 388 datasets (standing position, 224; supine position, 164) for the conventional protocol (December 2019-April 2021) and 336 datasets (standing position, 233; supine position, 103) for the refined protocol (June-November 2021). The conventional protocol (BMI-3 protocol) divided the patients into three BMI groups (BMI < 17, 17≤BMI < 25, and BMI ≥ 25 kg/m2 ), whereas the refined protocol (BMI-7 protocol) divided the patients into seven BMI groups (BMI < 17, 17 ≤ BMI < 20, 20 ≤ BMI < 23, 23 ≤ BMI < 26, 26 ≤ BMI < 29, 29 ≤ BMI < 32, and BMI ≥ 32 kg/m2 ). The coefficients of variation (CVs) for the S-values and ESDs acquired using the two protocols were compared. RESULTS: The CVs of the S-values in the BMI-7 protocol group were significantly lower than those in the BMI-3 protocol group for the standing (28.8&#37; vs. 16.7&#37;; p < 0.01) and supine (24.5&#37; vs. 17.7&#37;; p < 0.01) positions. The ESDs of patients scanned using the BMI-7 protocol were significantly lower than those scanned using the BMI-3 protocol in the standing (1.3 vs. 1.1 mGy; p < 0.01) and supine positions (2.5 vs. 1.6 mGy; p < 0.01), although the mean BMI of the two groups were similar. CONCLUSION: We introduced the BMI-7 protocol and demonstrated its standardized image quality and reduced radiation exposure in patients undergoing DCR.

    DOI: 10.1002/acm2.14222

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  • Correlation Between Contrast-Detail Analysis and Clinical Image Quality Assessment of Intrapulmonary Lesions in Dual-Energy Subtraction Chest Radiography Using the TwoShot Method: A Phantom Study 国際誌

    Kuramoto, T; Takarabe, S; Kanzaki, Y; Shibayama, Y; Yamasaki, Y; Kitamura, Y

    ACADEMIC RADIOLOGY   31 ( 5 )   2118 - 2127   2023年11月   ISSN:1076-6332 eISSN:1878-4046

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Academic Radiology  

    RATIONALE AND OBJECTIVES: Dual-energy subtraction (DES) imaging constitutes a technique that has demonstrated efficacy in enhancing the detectability of pulmonary nodules on chest radiographs. However, a simple and quantitative methodology for evaluating the clinical image quality of DES images is currently lacking. The objective of this study was to investigate the applicability of contrast-detail (C-D) phantom analysis to the visual clinical image quality evaluation of chest DES images. MATERIALS AND METHODS: We employed a custom-made phantom incorporating the C-D phantom and a multipurpose anthropomorphic adult chest phantom. Two phantom sizes were utilized to simulate standard- and large-bodied adult patients for each phantom. The custom-made phantom images were scored automatically using dedicated software, yielding an inverse image quality figure (IQFinv) value. The multipurpose anthropomorphic adult chest phantom was employed in a visual grading analysis (VGA) study that was conducted by two experienced radiologists and five radiological technologists. Each nodule placed in the chest phantom image was rated on a 4-point Likert scale. RESULTS: A statistically significant correlation was observed between the VGA scores of the seven observers and the obtained IQFinv values. CONCLUSION: The findings of this study suggest that DES image analysis of the C-D phantom possesses the potential to be utilized for the evaluation of clinical DES image quality based on chest lesion detectability.

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  • Dynamic chest radiography for pulmonary vascular diseases: clinical applications and correlation with other imaging modalities

    山崎 誘三, 神谷 武志, 鷺山 幸二, 日野 卓也, 木佐貫 恵, 田畑 公佑, 磯田 拓郎, 北村 宜之, 阿部 弘太郎, 細川 和也, 豊村 大亮, 森山 祥平, 河窪 正照, 藪内 英剛, 石神 康生

    Japanese Journal of Radiology   42   126 - 144   2023年8月   ISSN:18671071 eISSN:1867108X

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    記述言語:英語   出版者・発行元:Japan Radiological Society  

    Dynamic chest radiography (DCR) is a novel functional radiographic imaging technique that can be used to visualize pulmonary perfusion without using contrast media. Although it has many advantages and clinical utility, most radiologists are unfamiliar with this technique because of its novelty. This review aims to (1) explain the basic principles of lung perfusion assessment using DCR, (2) discuss the advantages of DCR over other imaging modalities, and (3) review multiple specific clinical applications of DCR for pulmonary vascular diseases and compare them with other imaging modalities.

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  • The Feasibility of Deep Learning-Based Reconstruction for Low-Tube-Voltage CT Angiography for Transcatheter Aortic Valve Implantation 国際誌

    Kojima, T; Yamasaki, Y; Matsuura, Y; Mikayama, R; Shirasaka, T; Kondo, M; Kamitani, T; Kato, T; Ishigami, K; Yabuuchi, H

    JOURNAL OF COMPUTER ASSISTED TOMOGRAPHY   48 ( 1 )   77 - 84   2023年8月   ISSN:0363-8715 eISSN:1532-3145

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Journal of Computer Assisted Tomography  

    OBJECTIVE: The purpose of this study is to evaluate the efficacy of deep learning reconstruction (DLR) on low-tube-voltage computed tomographic angiography (CTA) for transcatheter aortic valve implantation (TAVI). METHODS: We enrolled 30 patients who underwent TAVI-CT on a 320-row CT scanner. Electrocardiogram-gated coronary CTA (CCTA) was performed at 100 kV, followed by nongated aortoiliac CTA at 80 kV using a single bolus of contrast material. We used hybrid-iterative reconstruction (HIR), model-based IR (MBIR), and DLR to reconstruct these images. The contrast-to-noise ratios (CNRs) were calculated. Five-point scales were used for the overall image quality analysis. The diameter of the aortic annulus was measured in each reconstructed image, and we compared the interobserver and intraobserver agreements. RESULTS: In the CCTA, the CNR and image quality score for DLR were significantly higher than those for HIR and MBIR (P < 0.01). In the aortoiliac CTA, the CNR for DLR was significantly higher than that for HIR (P < 0.01) and significantly lower than that for MBIR (P ≤ 0.02). The image quality score for DLR was significantly higher than that for HIR (P < 0.01). No significant differences were observed between the image quality scores for DLR and MBIR. The measured aortic annulus diameter had high interobserver and intraobserver agreement regardless of the reconstruction method (all intraclass correlation coefficients, >0.89). CONCLUSIONS: In low tube voltage TAVI-CT, DLR provides higher image quality than HIR, and DLR provides higher image quality than MBIR in CCTA and is visually comparable to MBIR in aortoiliac CTA.

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  • Technical Considerations for Performing Safe and Effective Balloon Pulmonary Angioplasty in Patients with Chronic Thromboembolic Pulmonary Hypertension 国際誌

    Hosokawa K., Yamasaki Y., Abe K.

    Interventional Cardiology Clinics   12 ( 3 )   367 - 380   2023年7月   ISSN:22117458

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Interventional Cardiology Clinics  

    Chronic thromboembolic pulmonary hypertension (CTEPH) is a late complication of acute pulmonary thromboembolism owing to incomplete clot dissolution in pulmonary artery. Pulmonary endarterectomy is the first-line treatment for CTEPH. However, 40&#37; of patients are not candidates for surgery because of distal lesions or age. Balloon pulmonary angioplasty (BPA), a catheter-based intervention, is increasingly being used worldwide for treating inoperable CTEPH. Previous BPA strategy had a major concern of reperfusion pulmonary edema as a complication. However, recent refined strategies promise safe and effective BPA. Five-year survival rate after BPA is 90&#37; for inoperable CTEPH, comparable with that of operable CTEPH.

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  • 乳癌の乳管内播種の術前評価における仮想単色スペクトラルCTイメージング 従来のCT及びMRIとの比較(Virtual monochromatic spectral CT imaging in preoperative evaluations for intraductal spread of breast cancer: comparison with conventional CT and MRI)

    Matsuura Yuko, Kamitani Takeshi, Sagiyama Koji, Yamasaki Yuzo, Hino Takuya, Kubo Makoto, Ijichi Hideki, Yamamoto Hidetaka, Yabuuchi Hidetake, Ishigami Kousei

    Japanese Journal of Radiology   41 ( 7 )   733 - 740   2023年7月   ISSN:1867-1071

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    記述言語:英語   出版者・発行元:(公社)日本医学放射線学会  

    乳癌の乳管内播種の術前評価における仮想単色スペクトラルCTイメージング(VMI)の有用性について検討した。病理学的に2cm以上の非浸潤性乳管癌(DCIS)あるいは浸潤性乳管癌(IDC)と診断された女性患者24人(34~74歳)を対象に、従来の120kVp CTと40keVp VMIにおける病変のコントラストノイズ比(CNR)について後方視的に比較した。また、病理学的にDCISあるいは微小浸潤性乳管癌と診断された女性患者22人(37~82歳)を対象に2人の放射線科専門医が120kVp CT、40keV VMI及びMRIにおける病変サイズを測定し、病理組織学的サイズと比較した。40keV VMIにおけるCNRの平均は5.5±1.9で120kVp CTの3.6±1.5よりも有意に大きかった。120kVp CTにおける病変サイズは病理組織学的サイズと比べて有意に過小評価されていたが、40keV VMIにおける病変サイズは病理組織学的サイズと有意差がなかった。MRIとの比較にて、40keV VMIでは誤差範囲が10mm以内の測定値が120kVp CTよりも多く得られた。以上より、VMIは乳癌の乳管内播種に対する術前評価に有用であると考えられた。

  • 特集1 絶対苦手分野にしない 成人先天性心疾患の画像診断 Fallot四徴症

    山崎 誘三, 神谷 武志, 石神 康生

    臨床画像   39 ( 6 )   614 - 621   2023年6月   ISSN:09111069

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    記述言語:日本語   出版者・発行元:メジカルビュー社  

    <文献概要>Fallot四徴症は,頻度の高い複雑先天性心疾患であり,日常診療で出くわす機会も多い。ほとんどが小児期に修復術を受けているが,成人期になって再手術が必要となることが多い。MRIは肺動脈弁逆流率の計測,正確な右心室容積計測が可能であり,再手術の適応評価に重要である。CTも形態評価やカテーテル治療の適応評価のために頻用されている。

    DOI: 10.18885/ci.0000001311

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  • Amide proton transfer (APT) imaging of breast cancers and its correlation with biological status 国際誌

    Kamitani, T; Sagiyama, K; Yamasaki, Y; Hino, T; Wada, T; Kubo, M; Akiyoshi, S; Yamamoto, H; Yabuuchi, H; Ishigami, K

    CLINICAL IMAGING   96   38 - 43   2023年4月   ISSN:0899-7071 eISSN:1873-4499

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Clinical Imaging  

    PURPOSE: To assess the usefulness of amide proton transfer (APT) imaging to predict the biological status of breast cancers. METHOD: Sixty-six patients (age range 31-85 years, mean 58.9 years) with histopathologically proven invasive ductal carcinomas of 2 cm or larger in diameter were included in this study. 3D APT weighted imaging was conducted on a 3 T scanner. Mean APT signal intensity (SI) was analyzed in relation to biological subtypes, Ki-67 labeling index, and nuclear grades (NGs). RESULTS: The triple-negative (TN) cancers (n = 10; 2.75 ± 0.42%) showed significantly higher APT SI than the luminal type cancers (n = 48; 1.74 ± 0.83) and HER2 cancers (n = 8; 1.83 ± 0.21) (P = 0.0007, 0.03). APT SI had weakly positive correlation with the Ki-67 labeling index (r = 0.38, P = 0.002). The mean APT SIs were significantly higher for high-Ki-67 (>30%) (n = 31; 2.25 ± 0.70) than low-Ki-67 (≤30%) cancers (n = 35; 1.60 ± 0.79) (P = 0.0007). There was no significant difference in the APT SIs between NG 1-2 (n = 31; 1.71 ± 0.84) and NG 3 (n = 35; 2.08 ± 0.76%) cancers (P = 0.06). CONCLUSIONS: TN and high-Ki-67 breast cancers showed high APT SIs. APT imaging can help to predict the biological status of breast cancers.

    DOI: 10.1016/j.clinimag.2023.02.002

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  • Dynamic digital radiography: a novel quantitative modality to assess the pulmonary blood flow 国際誌

    Toyomura, D; Yamamura, K; Yamasaki, Y

    EUROPEAN HEART JOURNAL   44 ( 16 )   1479 - 1479   2023年3月   ISSN:0195-668X eISSN:1522-9645

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:European Heart Journal  

    DOI: 10.1093/eurheartj/ehad112

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  • IQFinv.を用いたDual-energy Subtractionから得られる軟部画像の画質評価の検討

    寳部 真也, 倉本 卓, 神崎 祐依, 柴山 祐亮, 山崎 誘三, 吉川 英樹, 加藤 豊幸

    日本放射線技術学会総会学術大会予稿集   79回   207 - 207   2023年3月

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    記述言語:日本語  

  • One-shot Dual-energy Subtractionイメージングにおける肺模擬結節の視認性の評価

    神崎 祐依, 寳部 真也, 倉本 卓, 柴山 祐亮, 山崎 誘三, 吉川 英樹, 加藤 豊幸

    日本放射線技術学会総会学術大会予稿集   79回   183 - 183   2023年3月

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    記述言語:日本語  

  • 造影剤投与4分後の心電図非同期CT撮影による心筋ECV評価

    小島 宰, 山崎 誘三, 西懸 大介, 白坂 崇, 藪内 英剛, 加藤 豊幸, 石神 康生

    日本放射線技術学会総会学術大会予稿集   79回   281 - 281   2023年3月

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  • IQFinv.を用いたDual-energy Subtractionから得られる軟部画像の画質評価の検討

    寳部 真也, 倉本 卓, 神崎 祐依, 柴山 祐亮, 山崎 誘三, 吉川 英樹, 加藤 豊幸

    日本放射線技術学会総会学術大会予稿集   79回   207 - 207   2023年3月   ISSN:1884-7846

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    記述言語:日本語   出版者・発行元:(公社)日本放射線技術学会  

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  • 造影剤投与4分後の心電図非同期CT撮影による心筋ECV評価

    小島 宰, 山崎 誘三, 西懸 大介, 白坂 崇, 藪内 英剛, 加藤 豊幸, 石神 康生

    日本放射線技術学会総会学術大会予稿集   79回   281 - 281   2023年3月   ISSN:1884-7846

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  • マルチモダリティを用いた右室機能評価Update 心臓MRIとPETから得られた右室心筋ストレイン(Right Ventricular Myocardial Strain Derived from Cardiac Magnetic Resonance Imaging and Positron Emission Tomography)

    河窪 正照, 山崎 誘三, 長尾 充展, 阿部 弘太郎, 細川 和也, 永田 弾, 山村 健一郎, 豊村 大亮, 山本 篤志, 新井 英雄, 門上 俊明

    日本循環器学会学術集会抄録集   87回   SY22 - 3   2023年3月

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    記述言語:英語   出版者・発行元:(一社)日本循環器学会  

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  • One-shot Dual-energy Subtractionイメージングにおける肺模擬結節の視認性の評価

    神崎 祐依, 寳部 真也, 倉本 卓, 柴山 祐亮, 山崎 誘三, 吉川 英樹, 加藤 豊幸

    日本放射線技術学会総会学術大会予稿集   79回   183 - 183   2023年3月   ISSN:1884-7846

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  • Virtual monochromatic spectral CT imaging in preoperative evaluations for intraductal spread of breast cancer: comparison with conventional CT and MRI

    Matsuura, Y; Kamitani, T; Sagiyama, K; Yamasaki, Y; Hino, T; Kubo, M; Ijichi, H; Yamamoto, H; Yabuuchi, H; Ishigami, K

    JAPANESE JOURNAL OF RADIOLOGY   41 ( 7 )   733 - 740   2023年2月   ISSN:1867-1071 eISSN:1867-108X

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Japanese Journal of Radiology  

    PURPOSE: To investigate the efficacy of virtual monochromatic spectral computed tomography imaging (VMI) in the preoperative evaluation for intraductal spread of breast cancer. MATERIALS AND METHODS: Twenty-four women who underwent spectral CT and were pathologically diagnosed with ductal carcinoma with a ≥ 2-cm noninvasive component were retrospectively enrolled in Group 1. Twenty-two women with 22 lesions pathologically diagnosed with ductal carcinoma in situ or microinvasive carcinoma were enrolled in Group 2. We compared the contrast-to-noise ratios (CNRs) of the lesions on conventional 120-kVp CT images and 40-keV VMIs in Group 1. Two board-certified radiologists measured the maximum diameters of enhancing areas on 120-kVp CT, 40-keV VMI, and MRI in Group 2 and compared with histopathological sizes. RESULTS: The quantitative assessment of Group 1 revealed that the mean ± SD of the CNRs in the 40-keV images were significantly greater than those in the 120-kVp images (5.5 ± 1.9 vs. 3.6 ± 1.5, p < 0.0001). The quantitative assessment of Group 2 demonstrated that the lesion size observed in the conventional 120-kVp CT images by both readers was significantly underestimated as compared to the histopathological size (p = 0.017, 0.048), whereas both readers identified no significant differences between the lesion size measured on 40-keV VMI and the histopathological data. In a comparison with MRI, 40-keV VMI provided measurement within a 10-mm error range in more lesions as compared to the conventional 120-kVp CT. CONCLUSION: VMI improves the evaluation of intraductal spread and is useful for the preoperative evaluations of breast cancer.

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  • 顎関節に生じたピロリン酸カルシウム結晶沈着症の1例

    菊野 亮栄, 松浦 由布子, 鷺山 幸二, 神谷 武志, 樋田 知之, 山崎 誘三, 石神 康生, 松尾 美央子, 山元 英崇, 藪内 英剛

    Japanese Journal of Radiology   41 ( Suppl. )   60 - 60   2023年2月   ISSN:1867-1071 eISSN:1867-108X

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  • Visibility of Pulmonary Valve and Pulmonary Regurgitation on Intracardiac Echocardiography in Adult Patients with Tetralogy of Fallot 国際誌

    Sakamoto, I; Yamamura, K; Ishikita, A; Ohtani, K; Umemoto, S; Kaku, H; Yamasaki, Y; Abe, K; Ide, T; Tsutsui, H

    JOURNAL OF CARDIOVASCULAR DEVELOPMENT AND DISEASE   10 ( 1 )   2023年1月   eISSN:2308-3425

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Journal of Cardiovascular Development and Disease  

    Pulmonary regurgitation (PR) is a risk factor for sudden cardiac death in adult patients with repaired tetralogy of Fallot (TOF). However, transthoracic echocardiography (TTE) cannot fully visualize the pulmonary valve (PV) and PR. We investigated whether intracardiac echocardiography (ICE) could visualize the PV and PR better than TTE. Thirty adult patients with TOF (mean age 33 ± 15 years) scheduled for cardiac catheterization underwent ICE. The visualization of PV and the severity of PR were classified into three grades. ICE depicted the PV better than TTE (ICE vs. TTE: not visualized, partially visualized, and fully visualized: n = 1 [3%], n = 13 [43%], and n = 16 [53%] vs. n = 14 [47%], n = 13 [43%], and n = 3 [10%], p < 0.001). Especially in patients after pulmonary valve replacement (PVR), the PV was more fully visualized by ICE. The assessment of PR by TTE underestimated the severity of PR in comparison to cardiac magnetic resonance imaging (MRI) (severe PR: 8 [28%] vs. 22 [76%], p = 0.004), while there was no discrepancy between the results of ICE and MRI (21 [72%] vs. 22 [76%], p = 1.000). In comparison to TTE, ICE can safely provide better visualization of the PV and PR in adults with TOF, especially in patients who have undergone PVR.

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  • Efficacy of Dynamic Chest Radiography for Chronic Thromboembolic Pulmonary Hypertension 国際誌

    Yamasaki, Y; Abe, K; Kamitani, T; Hosokawa, K; Hida, T; Sagiyama, K; Matsuura, Y; Baba, S; Isoda, T; Maruoka, Y; Kitamura, Y; Moriyama, S; Yoshikawa, H; Fukumoto, T; Yabuuchi, H; Ishigami, K

    RADIOLOGY   306 ( 3 )   220908 - 220908   2022年11月   ISSN:0033-8419

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Radiology  

    Background While current guidelines require lung ventilation-perfusion (V/Q) scanning as the first step to diagnose chronic pulmonary embolism in pulmonary hypertension (PH), its use may be limited by low availability and/or exposure to ionizing radiation. Purpose To compare the performance of dynamic chest radiography (DCR) and lung V/Q scanning for detection of chronic thromboembolic PH (CTEPH). Materials and Methods Patients with PH who underwent DCR and V/Q scanning in the supine position from December 2019 to July 2021 were retrospectively screened. The diagnosis of CTEPH was confirmed with right heart catheterization and invasive pulmonary angiography. Observer tests were conducted to evaluate the diagnostic accuracy of DCR and V/Q scanning. The lungs were divided into six areas (upper, middle, and lower for both) in the anteroposterior image, and the number of lung areas with thromboembolic perfusion defects was scored. Diagnostic performance was compared between DCR and V/Q scanning using the area under the receiver operating characteristic curve. Agreement between the interpretation of DCR and that of V/Q scanning was assessed using the Cohen kappa coefficient and percent agreement. Results A total of 50 patients with PH were analyzed: 29 with CTEPH (mean age, 64 years ± 15 [SD]; 19 women) and 21 without CTEPH (mean age, 61 years ± 22; 14 women). The sensitivity, specificity, and accuracy of DCR were 97&#37;, 86&#37;, and 92&#37;, respectively, and those of V/Q scanning were 100&#37;, 86&#37;, and 94&#37;, respectively. Areas under the receiver operating characteristic curve for DCR and V/Q scanning were 0.92 (95&#37; CI: 0.79, 0.97) and 0.93 (95&#37; CI: 0.78, 0.98). Agreement between the consensus interpretation of DCR and that of V/Q scanning was substantial (κ = 0.79 [95&#37; CI: 0.61, 0.96], percent agreement = 0.9 [95&#37; CI: 0.79, 0.95]). Conclusion Dynamic chest radiography had similar efficacy to ventilation-perfusion scanning in the detection of chronic thromboembolic pulmonary hypertension. © RSNA, 2022 Online supplemental material is available for this article. See also the editorial by Wandtke and Koproth-Joslin in this issue.

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  • Dynamic Chest Radiography of Acute Pulmonary Thromboembolism 国際誌

    Yamasaki, Y; Hosokawa, K; Abe, K; Ishigami, K

    RADIOLOGY-CARDIOTHORACIC IMAGING   4 ( 4 )   e220086   2022年8月   ISSN:2638-6135

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Radiology: Cardiothoracic Imaging  

    Supplemental material is available for this article.

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  • ガントリ回転時間が0.35sの超高精細冠動脈造影において心拍数の重要性(Importance of the heart rate in ultra-high-resolution coronary CT angiography with 0.35 s gantry rotation time)

    Kojima Tsukasa, Shirasaka Takashi, Yamasaki Yuzo, Kondo Masatoshi, Hamasaki Hiroshi, Mikayama Ryoji, Sakai Yuki, Kato Toyoyuki, Nishie Akihiro, Ishigami Kousei, Yabuuchi Hidetake

    Japanese Journal of Radiology   40 ( 8 )   781 - 790   2022年8月   ISSN:1867-1071

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    記述言語:英語   出版者・発行元:(公社)日本医学放射線学会  

    超高精細CT(U-HRCT)による冠動脈CT造影(CCTA)で、モーションアーチファクトに対し、心拍数(HR)が及ぼす影響について検討した。模擬冠動脈が付随した模擬心臓動態ファントムと、CCTA受診患者でU-HRCTと従来のCT(CRCT)画像を比較し、U-HRCT CCTAにおける最適なHRの上限を決定した。安静下およびHRシミュレーション(10bpm間隔で40-90bpm)下で、心臓動態ファントムを両CTで走査し、模擬冠動脈モデルのシャープネスと血管内腔径を定量的に評価した。また、U-HRCTによるCCTAの臨床画像に関しては、視覚評価も行った。その結果、HR≦60bpmではU-HRCTの血管内腔径の誤差はCRCTよりも小さい傾向だったが、HR>60bpmでは逆に大きく、モーションアーチファクトに強く影響されていた。なお、画像シャープネスでは、U-HRCTではCRCTに比べ有意に優れており、視覚評価のスコアでは患者のHRと負に相関した(Spearman r=-0.71、p<0.01)。一方、ROC解析では最終診断が得られなかった画質のHR最適カットオフ値で61bpmが得られ、AUCは0.87、感度95%、特異度71%であった。以上より、HR≦60bpmの場合には、U-HRCTが冠動脈造影ではCRCTよりも診断精度が高く、U-HRCTによるCCTAにより、最適なHRの上限値が約60bpmであることが示唆された。

  • Right ventricular strain and volume analyses through deep learning-based fully automatic segmentation based on radial long-axis reconstruction of short-axis cine magnetic resonance images 国際誌

    Kawakubo, M; Moriyama, D; Yamasaki, Y; Abe, K; Hosokawa, K; Moriyama, T; Triadyaksa, P; Wibowo, A; Nagao, M; Arai, H; Nishimura, H; Kadokami, T

    MAGNETIC RESONANCE MATERIALS IN PHYSICS BIOLOGY AND MEDICINE   35 ( 6 )   911 - 921   2022年5月   ISSN:1352-8661

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Magnetic Resonance Materials in Physics, Biology and Medicine  

    OBJECTIVE: We propose a deep learning-based fully automatic right ventricle (RV) segmentation technique that targets radially reconstructed long-axis (RLA) images of the center of the RV region in routine short axis (SA) cardiovascular magnetic resonance (CMR) images. Accordingly, the purpose of this study is to compare the accuracy of deep learning-based fully automatic segmentation of RLA images with the accuracy of conventional deep learning-based segmentation in SA orientation in terms of the measurements of RV strain parameters. MATERIALS AND METHODS: We compared the accuracies of the above-mentioned methods in RV segmentations and in measuring RV strain parameters by Dice similarity coefficients (DSCs) and correlation coefficients. RESULTS: DSC of RV segmentation of the RLA method exhibited a higher value than those of the conventional SA methods (0.84 vs. 0.61). Correlation coefficient with respect to manual RV strain measurements in the fully automatic RLA were superior to those in SA measurements (0.5-0.7 vs. 0.1-0.2). DISCUSSION: Our proposed RLA realizes accurate fully automatic extraction of the entire RV region from an available CMR cine image without any additional imaging. Our findings overcome the complexity of image analysis in CMR without the limitations of the RV visualization in echocardiography.

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  • Importance of the heart rate in ultra-high-resolution coronary CT angiography with 0.35 s gantry rotation time

    Kojima, T; Shirasaka, T; Yamasaki, Y; Kondo, M; Hamasaki, H; Mikayama, R; Sakai, Y; Kato, T; Nishie, A; Ishigami, K; Yabuuchi, H

    JAPANESE JOURNAL OF RADIOLOGY   40 ( 8 )   781 - 790   2022年4月   ISSN:1867-1071 eISSN:1867-108X

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Japanese Journal of Radiology  

    Purpose We investigated the effects of the heart rate (HR) on the motion artifact in coronary computed tomography angiography (CCTA) with ultra-high-resolution-CT (U-HRCT), and we clarified the upper limit of optimal HR in CCTA with U-HRCT in a comparison with conventional-resolution-CT (CRCT) on a cardiac phantom and in patients with CCTA.Materials and methods A pulsating cardiac phantom equipped with coronary models was scanned at static and HR simulations of 40-90 beats/min (bpm) at 10-bpm intervals using U-HRCT and CRCT, respectively. The sharpness and lumen diameter of the coronary model were quantitatively compared between U-HRCT and CRCT stratified by HR in the phantom study. We also assessed the visual inspections of clinical images in CCTA with U-HRCT.Results At the HRs <= 60 bpm, the error of the lumen diameter of the U-HRCT tended to be smaller than that of the CRCT. However, at the HRs > 60 bpm, the inverse was shown. For the image sharpness, the U-HRCT was significantly superior to the CRCT (p < 0.05). In the visual assessment, the scores were negatively correlated with HRs in patients (Spearman r= - 0.71, p < 0.01). A receiver-operating characteristic analysis revealed the HR of 61 bpm as the optimal cutoff of the non-diagnostic image quality, with an area under the curve of 0.87, 95&#37; sensitivity, and 71&#37; specificity.Conclusion At HRs <= 60 bpm, U-HRCT was more accurate in the imaging of coronary arteries than CRCT. The upper limit of the optimal HR in CCTA with U-HRCT was approx. 60 bpm.

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  • 右心室評価のための圧縮センシングと収縮期取得による高解像度T1マッピング 国際誌

    西懸大介, 山崎誘三, 山村健一郎

    日本循環器学会学術集会(Web)   38 ( 10 )   2219 - 2225   2022年4月   ISSN:1569-5794 eISSN:1875-8312

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:International Journal of Cardiovascular Imaging  

    To investigate the usefulness of high-resolution systolic T1 mapping using compressed sensing for right ventricular (RV) evaluation. Phantoms and normal volunteers were scanned at 3 T by using a high-resolution (HR) modified look-locker inversion recovery (MOLLI) pulse sequence and a conventional MOLLI pulse sequence. The T1 values of the left ventricular (LV) and RV myocardium and blood pool were measured for each sequence. T1 values of HR-MOLLI and MOLLI sequences were compared in the LV myocardium, blood pool, and RV myocardium. The T1 values of HR-MOLLI and MOLLI showed good agreement in both phantoms and the LV myocardium and blood pool of volunteers. However, there was a significant difference between HR-MOLLI and MOLLI in the RV myocardium (1258 ± 52 ms vs. 1327 ± 73 ms; P = 0.0005). No significant difference was observed between the T1 value of RV and that of LV (1217 ± 32 ms) in HR-MOLLI, whereas the T1 value of RV was significantly higher than that of LV in MOLLI (P < 0.0001). The interclass correlation coefficients of intraobserver variabilities from HR-MOLLI and MOLLI were 0.919 and 0.804, respectively, and the interobserver variabilities from HR-MOLLI and MOLLI were 0.838 and 0.848, respectively. Assessment of RV myocardium by using HR systolic T1 mapping was superior to the conventional MOLLI sequence in terms of accuracy and reproducibility.

    DOI: 10.1007/s10554-022-02622-y

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  • 少量造影剤による低管電圧TAVI-CTにおけるDeep Learning Reconstructionの有用性

    小島 宰, 山崎 誘三, 松浦 由布子, 白坂 崇, 加藤 豊幸, 藪内 英剛, 石神 康生

    日本放射線技術学会総会学術大会予稿集   78回   232 - 233   2022年3月

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    記述言語:日本語  

  • Is the image quality of conventional chest radiography obtained from a two-layer flat panel detector affected by the internal structure of the detector? 国際誌

    Takarabe, S; Kuramoto, T; Shibayama, Y; Yamasaki, Y; Kitamura, Y; Yoshikawa, H; Kato, T

    PHYSICA MEDICA-EUROPEAN JOURNAL OF MEDICAL PHYSICS   95   176 - 181   2022年3月   ISSN:1120-1797 eISSN:1724-191X

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Physica Medica  

    PURPOSE: Recently developed and commercialized dual-layer flat panel detectors (DL-FPDs) with two indirect scintillators are capable of acquiring dual-energy X-ray images. However, in clinical practice, they are utilized to perform conventional radiography using diagnostic X-rays with a wide energy spectrum. The two layers of the DL-FPD may affect the obtained image quality, even when only using one layer for conventional image acquisition, and these effects are yet to be substantiated. Therefore, in this study, we quantitatively evaluated the image quality of a conventional chest radiography using DL-FPD and visually verified the characteristics of the chest anthropomorphic phantom images. METHODS: The physical characteristics of the system were evaluated using the pre-sampled modulation transfer function (MTF), normalized noise power spectrum (NNPS), and detective quantum efficiency (DQE), for beam quality RQA 7 and RQA 9. In addition, the subjective visibility of the anthropomorphic chest phantom and simple objects images were compared with those of a conventional single-layer flat-panel detector (SL-FPD). RESULTS: No significant differences were found in the MTF between the SL-FPD and DL-FPD images. In addition, a higher DQE was observed at some exposure doses and in the high spatial frequency regions wherein NNPSs were lower for DL-FPD than for SL-FPD. Furthermore, no significant differences were found in the subjective visibility of the chest phantoms in each system. CONCLUSIONS: We concluded that the image quality of the conventional radiography acquired with DL-FPD is comparable to or better than that of the SL-FPD.

    DOI: 10.1016/j.ejmp.2022.02.004

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  • 少量造影剤による低管電圧TAVI-CTにおけるDeep Learning Reconstructionの有用性

    小島 宰, 山崎 誘三, 松浦 由布子, 白坂 崇, 加藤 豊幸, 藪内 英剛, 石神 康生

    日本放射線技術学会総会学術大会予稿集   78回   232 - 233   2022年3月   ISSN:1884-7846

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    記述言語:日本語   出版者・発行元:(公社)日本放射線技術学会  

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  • Chronic thromboembolic pulmonary hypertension after acute pulmonary thromboembolism revealed by dynamic chest radiography 国際誌

    Yamasaki, Y; Moriyama, S; Tatsumoto, R; Abe, K; Ishigami, K

    EUROPEAN HEART JOURNAL-CARDIOVASCULAR IMAGING   23 ( 6 )   e264-e265 - E265   2022年2月   ISSN:2047-2404 eISSN:2047-2412

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:European Heart Journal Cardiovascular Imaging  

    DOI: 10.1093/ehjci/jeac027

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  • 軟部腫瘍診療における生検と画像診断の役割

    鷺山 幸二, 神谷 武志, 山崎 誘三, 樋田 知之, 松浦 由布子, 藪内 英剛, 牛島 泰宏, 石神 康生

    日本インターベンショナルラジオロジー学会雑誌   36 ( 2 )   119 - 125   2022年   ISSN:13404520 eISSN:21856451

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    記述言語:日本語   出版者・発行元:一般社団法人日本インターベンショナルラジオロジー学会  

    軟部腫瘍の発生部位は四肢をはじめ全身に及び、皮下や筋間、筋肉、後腹膜など深度も様々である。良性腫瘍、中間悪性腫瘍、希少癌の悪性軟部腫瘍に分けられる。診断は病理診断により確定されるが、不適切な生検手技は患者の予後を悪化させる。軟部腫瘍の病理診断と根治的治療の手術に関して簡単に述べ、現在大きな問題になっている無計画切除に言及した。各生検技法の概要と注意点を述べ、その補助となる画像モダリティーの特徴を解説した。画像ガイド下針生検が奏効した症例を紹介した。

    DOI: 10.11407/ivr.36.119

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  • Evaluation of MR imaging findings differentiating parotid basal cell adenomas from other parotid tumors. 国際誌

    Yuriko Murayama, Takeshi Kamitani, Koji Sagiyama, Yuzo Yamasaki, Tomoyuki Hida, Yuko Matsuura, Ryuji Yasumatsu, Hidetaka Yamamoto, Hidetake Yabuuchi, Kousei Ishigami

    European journal of radiology   144   109980 - 109980   2021年9月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    PURPOSE: To evaluate the usefulness of magnetic resonance imaging (MRI) to differentiate basal cell adenomas (BCAs) from other parotid tumors. METHOD: A total of 136 patients with histologically proven parotid gland tumors (13 BCAs, 66 pleomorphic adenomas [PAs], 30 Warthin tumors [WTs], and 27 parotid cancers [PCs]) who underwent a cervical MRI study between December 2011 and March 2019 were retrospectively enrolled. The MRI findings of the tumors were evaluated by two board-certified radiologists. RESULTS: All 13 of the BCAs showed smooth margins, while 19 of the 27 PCs showed irregular margins (p < 0.0001). Eleven BCAs had some cystic components, and five were cyst-dominant. The BCAs had significantly more cystic components than the PAs (p = 0.0077). The mean apparent diffusion coefficient (ADC) value of the BCAs was 1.21 ± 0.20 × 10-3 mm2/sec, which was equivalent to that of the PCs (1.12 ± 0.25 × 10-3 mm2/sec, p = 0.76), significantly lower than that of the PAs (1.61 ± 0.32 × 10-3 mm2/sec, p < 0.0001), and significantly higher than that of the WTs (0.81 ± 0.19 × 10-3 mm2/sec, p = 0.0004). The plateau time-intensity curve (TIC) was the most common type for both BCAs and PCs, seen in 8 of 12 BCAs and 21 of 26 PCs, with no significant difference between these groups (p = 0.34). CONCLUSIONS: BCA should be considered a possibility when a parotid lesion has smooth margins with an entire capsule and includes a cystic component, even if the TIC and diffusion-weighted MR images suggest a malignant pattern.

    DOI: 10.1016/j.ejrad.2021.109980

  • Unchanged right ventricular strain in repaired tetralogy of Fallot after pulmonary valve replacement with radial long-axis cine magnetic resonance images. 国際誌

    Masateru Kawakubo, Yuzo Yamasaki, Daisuke Toyomura, Kenichiro Yamamura, Ichiro Sakamoto, Tetsuhiro Moriyama, Hidetake Yabuuchi, Kousei Ishigami

    Scientific reports   11 ( 1 )   18879 - 18879   2021年9月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    We measured right ventricular (RV) strain by applying a novel postprocessing technique to conventional short-axis cine magnetic resonance imaging in the repaired tetralogy of Fallot (TOF) and investigated whether pulmonary valve replacement (PVR) changes the RV strain. Twenty-four patients with repaired TOF who underwent PVR and 16 healthy controls were enrolled. Global maximum and minimum principal strains (GPSmax, GPSmin) and global circumferential and longitudinal strains (GCS, GLS) were measured from short-axis cine images reconstructed radially along the long axis. Strain parameters before and after PVR were compared using paired t-tests. One-way ANOVA with Tukey post-hoc analysis was used for comparisons between the before and after PVR groups and the control group. There were no differences in strain parameters before and after PVR. The GPSmax before PVR was lower than that in the control group (P = 0.002). Before and after PVR, GCSs were higher and GLSs were lower than those in the control group (before and after GCSs: P = 0.002 for both, before and after GLSs: P < 0.0001 and P = 0.0003). RV strains from radially reconstructed short-axis cine images revealed unchanged myocardial motion after PVR. When compared to the control group, changes in GCS and GLS in TOF patients before and after PVR might be due to RV remodeling.

    DOI: 10.1038/s41598-021-98464-0

  • Usefulness of 18F-Fluorodeoxyglucose Positron Emission Tomography/Computed Tomography in the Diagnosis of Infective Endocarditis in Patients With Adult Congenital Heart Disease.

    Ayako Ishikita, Ichiro Sakamoto, Kenichiro Yamamura, Shintaro Umemoto, Hazumu Nagata, Yoshiyuki Kitamura, Yuzo Yamasaki, Hiromichi Sonoda, Hideki Tatewaki, Akira Shiose, Hiroyuki Tsutsui

    Circulation journal : official journal of the Japanese Circulation Society   85 ( 9 )   1505 - 1513   2021年8月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    BACKGROUND: Infective endocarditis (IE) in patients with adult congenital heart disease (ACHD) remains a diagnostic challenge due to difficulties in detecting endocardial lesions by echocardiography. 18F-fluorodeoxyglucose (18F-FDG) positron emission tomography/computed tomography (PET/CT) has shown good diagnostic performance in prosthetic valve IE. This study aimed to assess its additional diagnostic value in ACHD-associated IE and to characterize its advantages.Methods and Results:Overall, 22 patients with ACHD and clinical suspicion of IE were retrospectively studied. 18F-FDG PET/CT was performed in addition to conventional assessment based on the modified Duke criteria. The final IE diagnosis was determined by an expert team during a 3-month clinical course, resulting in 18 patients diagnosed with IE. Seven patients (39%) were diagnosed with definite IE only by initial echocardiography. An 18F-FDG PET/CT assessment revealed endocardial involvement in the other 9 patients, resulting in the diagnosis of definite IE in 16 in total (88%). Right-sided endocardial lesions were more common (n=12, 67%) but rarely identified by echocardiography, whereas 18F-FDG PET/CT revealed right-sided lesions in 9 patients. A negative 18F-FDG PET/CT (n=7, 39%) assessment was associated with a native valve IE (71% vs. 0%). In 4 patients who were identified with not-IE, neither echocardiography nor 18F-FDG PET/CT detected any suspicious cardiac involvement. CONCLUSIONS: In the diagnosis of ACHD-associated IE, characterized by right-sided IE, 18F-FDG PET/CT assessment should be useful.

    DOI: 10.1253/circj.CJ-20-1067

  • Dynamic Chest Radiography of Pulmonary Arteriovenous Malformation. 国際誌

    Yuzo Yamasaki, Kousei Ishigami

    Radiology   300 ( 2 )   285 - 285   2021年8月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    Online supplemental material is available for this article.

    DOI: 10.1148/radiol.2021204631

  • Diagnosis of Pulmonary Hypertension Using Dynamic Chest Radiography. 国際誌

    Yuzo Yamasaki, Takeshi Kamitani, Kohtaro Abe, Kazuya Hosokawa, Koji Sagiyama, Tomoyuki Hida, Yuko Matsuura, Yoshiyuki Kitamura, Yasuhiro Maruoka, Takuro Isoda, Shingo Baba, Hideki Yoshikawa, Taku Kuramoto, Hidetake Yabuuchi, Kousei Ishigami

    American journal of respiratory and critical care medicine   204 ( 11 )   1336 - 1337   2021年6月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    DOI: 10.1164/rccm.202102-0387IM

  • A multistage strategy of perfusion SPECT and CT pulmonary angiogram in balloon pulmonary angioplasty for totally occluded lesions. 国際誌

    Kazuya Hosokawa, Kohtaro Abe, Yuzo Yamasaki, Hiroyuki Tsutsui

    EuroIntervention : journal of EuroPCR in collaboration with the Working Group on Interventional Cardiology of the European Society of Cardiology   17 ( 2 )   e167-e168   2021年6月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    DOI: 10.4244/EIJ-D-20-00652

  • New transluminal attenuation gradient derived from dynamic coronary CT angiography: diagnostic ability of ischemia detected by 13N-ammonia PET.

    Tsukasa Kojima, Michinobu Nagao, Hidetake Yabuuchi, Yuzo Yamasaki, Takashi Shirasaka, Masateru Kawakubo, Kenji Fukushima, Toyoyuki Kato, Atsushi Yamamoto, Risako Nakao, Akiko Sakai, Eri Watanabe, Shuji Sakai

    Heart and vessels   36 ( 4 )   433 - 441   2021年4月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    Coronary computed tomography angiography (CCTA) has low specificity for detecting significant functional coronary stenosis. We developed a new transluminal attenuation gradient (TAG)-derived dynamic CCTA with dose modulation, and we investigated its diagnostic performance for myocardial ischemia depicted by 13N-ammonia positron emission tomography (PET). Data from 48 consecutive patients who had undergone both dynamic CCTA and 13N-ammonia PET were retrospectively analyzed. Dynamic CCTA was continuously performed in mid-diastole for five cardiac cycles with prospective electrocardiography gating after a 10-s contrast medium injection. One scan of the dynamic CCTA was performed as a boost scan for conventional CCTA at the peak phase of the ascending aorta. Absolute TAG values at five phases around the boost scan were calculated. The dynamic TAG index (DTI) was defined as the ratio of the maximum absolute TAG to the standard deviation of five TAG values. We categorized the coronary territories as non-ischemia or ischemia based on the 13N-ammonia PET results. A receiver operating characteristic (ROC) analysis was performed to determine the optimal cutoff of the DTI for identifying ischemia. The DTI was significantly higher for ischemia compared to non-ischemia (8.8 ± 3.9 vs. 4.6 ± 2.0, p < 0.01). The ROC analysis revealed 5.60 as the optimal DTI cutoff to detect ischemia, with an area under the curve of 0.87, 85.7% sensitivity, and 76.2% specificity. TAG provided no additional diagnostic value for the detection of ischemia. We propose the DTI derived from dynamic CCTA as a novel coronary flow index. The DTI is a valid technique for detecting functional coronary stenosis.

    DOI: 10.1007/s00380-020-01712-y

  • Right Ventricular Extracellular Volume with Dual-Layer Spectral Detector CT: Value in Chronic Thromboembolic Pulmonary Hypertension. 国際誌

    Yuzo Yamasaki, Kohtaro Abe, Takeshi Kamitani, Koji Sagiyama, Tomoyuki Hida, Kazuya Hosokawa, Yuko Matsuura, Kazuhito Hioki, Michinobu Nagao, Hidetake Yabuuchi, Kousei Ishigami

    Radiology   298 ( 3 )   589 - 596   2021年3月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    Background Right ventricular (RV) extracellular volumes (ECVs), as a surrogate for histologic fibrosis, have not been sufficiently investigated. Purpose To evaluate and compare RV and left ventricular (LV) ECVs obtained with dual-layer spectral detector CT (DLCT) in chronic thromboembolic pulmonary hypertension (CTEPH) and investigate the clinical importance of RV ECV. Materials and Methods Retrospective analysis was performed on data from 31 patients with CTEPH (17 were not treated with pulmonary endarterectomy [PEA] or balloon pulmonary angioplasty [BPA] and 14 were) and eight control subjects who underwent myocardial delayed enhancement (MDE) DLCT from January 2019 to June 2020. The ECVs in the RV and LV walls were calculated by using iodine density as derived from spectral data pertaining to MDE. Statistical analyses were performed with one-way repeated analysis of variance with the Tukey post hoc test or the Kruskal-Wallis test with the Steel-Dwass test and linear regression analysis. Results The PEA- and BPA-naive group showed significantly higher ECVs than the PEA- or BPA-treated group and control group in the septum (28.2% ± 2.9 vs 24.3% ± 3.6, P = .005), anterior right ventricular insertion point (RVIP) (32.9% ± 4.6 vs 25.3% ± 3.6, P < .001), posterior RVIP (35.2% ± 5.2 vs 27.3% ± 4.2, P < .001), mean RVIP (34.0% ± 4.2 vs 26.3% ± 3.4, P < .001), RV free wall (29.5% ± 3.3 vs 25.9% ± 4.1, P = .036), and mean RV wall (29.1% ± 3.0 vs 26.1% ± 3.1, P = .029). There were no significant differences between the PEA- or BPA-treated group and control subjects in these segments (septum, P = .93; anterior RVIP, P = .38; posterior RVIP, P = .52; mean RVIP, P = .36; RV free wall, P = .97; and mean RV, P = .33). There were significant correlations between ECV and mean pulmonary artery pressure (PAP) or brain natriuretic peptide (BNP) in the mean RVIP (mean PAP: R = 0.66, P < .001; BNP: R = 0.44, P = .014) and the mean RV (mean PAP: R = 0.49, P = .005; BNP: R = 0.44, P = .013). Conclusion Right ventricular and right ventricular insertion point extracellular volumes could be noninvasive surrogate markers of disease severity and reverse tissue remodeling in chronic thromboembolic pulmonary hypertension. © RSNA, 2021 Online supplemental material is available for this article. See also the editorial by Sandfort and Bluemke in this issue.

    DOI: 10.1148/radiol.2020203719

  • RADspeed Pro style editionと胸部動態撮影の使用経験について

    倉本 卓, 吉川 英樹, 服部 昭子, 山崎 誘三, 樋田 知之, 神谷 武志, 加藤 豊幸, 石神 康生

    MEDICAL NOW   ( 88 )   17 - 22   2021年2月

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    記述言語:日本語  

  • Model-based iterative reconstruction for 320-detector row CT angiography reduces radiation exposure in infants with complex congenital heart disease. 国際誌

    Yuzo Yamasaki, Takeshi Kamitani, Koji Sagiyama, Yuko Matsuura, Tomoyuki Hida, Hazumu Nagata

    Diagnostic and interventional radiology (Ankara, Turkey)   27 ( 1 )   42 - 49   2021年1月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    PURPOSE: We investigated the impact of model-based iterative reconstruction (MBIR) on 320-detector row computed tomography angiography (CTA) in infants with complex congenital heart disease (CHD). METHODS: Seventy infants with complex CHD who underwent 320-detector row CTA (40 boys and 30 girls; age range, 0-22 months; median age, 60 days) were retrospectively evaluated. First, the images were reconstructed by filtered back projection (FBP), hybrid iterative reconstruction (HIR), or MBIR in 20 cases, and variables were compared among the three iterative reconstruction methods (IR test). Second, the variables were compared between 25 cases scanned using HIR and 25 cases scanned using MBIR, with a 20 standard deviation noise level for both. Attenuation values and contrast-to-noise ratios (CNRs) of the great vessels and heart chambers were calculated. Total dose-length products were recorded for all patients (radiation dose: RD test). RESULTS: In the IR test, the mean CNR values were 4.8±1.3 for FBP, 6.9±1.4 for HIR, and 8.2±1.7 for MBIR (P < 0.0001). The best subjective image qualities in the great vessels and heart chambers were obtained with MBIR. In RD testing, no significant differences between HIR and MBIR in image quality (CNR: HIR, 8.4±2.4; MBIR, 8.3±2.4) were observed. The effective dose was significantly lower for MBIR than for HIR (0.7±0.2 vs. 1.1±0.3 mSv; P < 0.001). CONCLUSION: The MBIR algorithm significantly improved image quality and decreased radiation exposure in 320-row CTA of infants with complex CHD, providing an alternative to FBP or HIR that is both safer and produces better results.

    DOI: 10.5152/dir.2020.19633

  • Pulmonary ventilation-perfusion mismatch demonstrated by dynamic chest radiography in giant cell arteritis. 国際誌

    Yuzo Yamasaki, Kazuya Hosokawa, Hiroyuki Tsutsui, Kousei Ishigami

    European heart journal   42 ( 2 )   208 - 209   2021年1月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    DOI: 10.1093/eurheartj/ehaa443

  • Active Cardiac Sarcoidosis Imitating Cardiac Metastases. 国際誌

    Yuzo Yamasaki, Mayumi Yoshikawa, Koji Sagiyama, Takeshi Kamitani

    Radiology. Cardiothoracic imaging   2 ( 6 )   e200310   2020年12月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    DOI: 10.1148/ryct.2020200310

  • Amide proton transfer (APT) imaging of parotid tumors Differentiation of malignant and benign tumors 査読 国際誌

    Takeshi Kamitani, Koji Sagiyama, Osamu Togao, Yuzo Yamasaki, Tomoyuki Hida, Yuko Matsuura, Yuriko Murayama, Ryuji Yasumatsu, Hidetaka Yamamoto, Hidetake Yabuuchi

    European Journal of Radiology   129   109047 - 109047   2020年8月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    Purpose: To assess the usefulness of amide proton transfer (APT) imaging in differentiating parotid tumors. Material and methods: We retrospectively analyzed 43 histopathologically proven parotid solid tumors with diameters ≥2 cm. Twenty-one tumors were benign and 12 tumors were malignant. Two-dimensional APT imaging was performed using a saturation pulse with a duration of 2 s and a saturation power level of 2 μT. For acquiring Z-spectra, the imaging was repeated at 25 saturation frequency offsets from ω = −6 to +6 ppm with a step of 0.5 ppm as well as one scan acquired far off-resonance (−1560 ppm) for signal normalization. For the APT imaging, the asymmetry analysis at 3.5 ppm downfield from the water signal was calculated. The mean APT signal intensity (SI) was compared between the benign and malignant tumors. Results: The mean APT SI was 2.23 ± 0.80 &#37; in the benign tumors and significantly higher at 2.99 ± 0.99 &#37; in the malignant tumors (P = 0.01). A receiver operating curve analysis revealed that the optimal APT SI threshold was 2.40 for distinguishing malignant tumors from benign tumors with an area under the curve of 0.74. The sensitivity, specificity, and accuracy were 83.3&#37;, 61.3&#37;, and 67.4&#37;, respectively. Conclusion: The mean APT SI of the malignant parotid tumors was significantly higher than that of the benign parotid tumors.

    DOI: 10.1016/j.ejrad.2020.109047

  • Balloon pulmonary angioplasty improves right atrial reservoir and conduit functions in chronic thromboembolic pulmonary hypertension 査読 国際誌

    Yuzo Yamasaki, Kohtaro Abe, Takeshi Kamitani, Kazuya Hosokawa, Masateru Kawakubo, Koji Sagiyama, Tomoyuki Hida, Yuko Matsuura, Yuriko Murayama, Ryohei Funatsu, Hiroyuki Tsutsui, Hidetake Yabuuchi

    European heart journal cardiovascular Imaging   21 ( 8 )   855 - 862   2020年8月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    Aims Right atrial (RA) function largely contributes to the maintenance of right ventricular (RV) function. This study investigated the effect of balloon pulmonary angioplasty (BPA) on RA functions in patients with inoperable chronic thromboembolic pulmonary hypertension (CTEPH) using cardiac magnetic resonance imaging (CMRI). Methods and results CMRI and RV catheterization were performed before BPA sessions and at the follow-up periods in 29 CTEPH patients. Reservoir [RA longitudinal strain (RA-LS)], passive conduit [RA early LS rate (LSR)], and active (RA late LSR) phases were assessed by using cine CMRI and a feature-tracking algorithm. The relationships between the changes in RA functions and in brain natriuretic peptide (BNP) were evaluated in both the dilated and non-dilated RA groups. RA-LS (32.4&#37; vs. 42.7&#37;), RA LSR (6.3&#37; vs. 8.3&#37;), and RA early LSR (-2.3&#37; vs. -4.3&#37;) were improved after BPA, whereas no significant change was seen in RA late LSR. The changes in RA peak LS and in RA early LSR were significantly correlated with the changes in BNP (ΔRA-LS: r = -0.63, DRA-early LSR: r = 0.65) and pulmonary vascular resistance (PVR) (ΔRA-LS: r = -0.69, DRA-early LSR: r = 0.66) in the nondilated RA group. Conclusion The RA reservoir and passive conduit functions were impaired in inoperable CTEPH, whereas RA active function was preserved. BPA markedly reversed these impaired functions. The improvements in RA reservoir and conduit functions were significantly correlated with the changes in BNP levels and PVR in CTEPH patients with normal RA sizes.

    DOI: 10.1093/ehjci/jeaa064

  • Characterization of parotid gland tumors added value of permeability MR imaging to DWI and DCE-MRI 査読 国際誌

    Hidetake Yabuuchi, Takeshi Kamitani, Koji Sagiyama, Yuzo Yamasaki, Tomoyuki Hida, Yuko Matsuura, Takuya Hino, Yuriko Murayama, Ryuji Yasumatsu, Hidetaka Yamamoto

    European Radiology   30 ( 12 )   6402 - 6412   2020年7月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    OBJECTIVES: To determine added value of permeability MRI in parotid tumor characterization to T2-weighted imaging (T2WI), semi-quantitative analysis of time-intensity curve (TIC), and intra-voxel incoherent motion diffusion-weighted imaging (IVIM-DWI).
    METHODS: This retrospective study was approved by the institutional review board, and the informed consent was waived. Sixty-one parotid tumors in 61 patients were examined using T2WI, IVIM-DWI, and permeability MRI. TIC patterns were categorized as persistent, washout, or plateau. Signal intensity ratio of lesion-to-muscle on T2WI, apparent diffusion coefficients (ADCs), D and f values from IVIM-DWI, and Ktrans, kep, Ve, and Vp values from permeability MRI were measured. Multiple comparisons were applied to determine whether any differences among 4 histopathologic types (pleomorphic adenomas, Warthin's tumors, other benign tumors, and malignant tumors) existed. Diagnostic accuracy was compared before and after modification diagnosis referring to permeability MRI. In a validation study, 60 parotid tumors in 60 patients were examined.
    RESULTS: ADC and D values of malignant tumors were significantly lower than those of benign tumors other than Warthin's tumors, but higher than those of Warthin's tumors. kep and Vp values of Warthin's tumors were significantly higher than those of malignant tumors. Multivariate analyses showed that TIC pattern, D, and kep values were suitable parameters. McNemar's test showed a significant increase of sensitivity (11/12, 92&#37;) and specificity (46/49, 94&#37;) with adding kep. The validation study yielded high sensitivity (14/16, 88&#37;) and specificity (41/44, 93&#37;).
    CONCLUSION: Permeability MRI offers added value to IVIM-MRI and semi-quantitative TIC analysis of DCE-MRI in characterization of parotid tumors KEY POINTS: • Permeability MR imaging offers added value in the characterization of parotid gland tumors in combination with semi-quantitative TIC analysis and IVIM analyses with D parameter. • The combination of TIC pattern, D, and kepmight facilitate accurate characterization of parotid gland tumor, thereby avoiding unnecessary surgery for benign tumors or delayed treatment for malignant tumors. • A combination of permeability and diffusion MR imaging can be used to guide the selection of an appropriate biopsy site.

    DOI: 10.1007/s00330-020-07004-3

  • A novel pulmonary circulation imaging using dynamic digital radiography for chronic thromboembolic pulmonary hypertension 査読 国際誌

    Yuzo Yamasaki, Kohtaro Abe, Kazuya Hosokawa, Takeshi Kamitani

    European heart journal   41 ( 26 )   2506 - 2506   2020年7月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    DOI: 10.1093/eurheartj/ehaa143

  • Frequency and Significance of Coronary Artery Disease and Myocardial Bridging in Patients With Hypertrophic Cardiomyopathy 査読 国際誌

    Nikki van der Velde, Roy Huurman, Yuzo Yamasaki, Isabella Kardys, Tjebbe W. Galema, Ricardo PJ Budde, Felix Zijlstra, Gabriel P. Krestin, Arend FL Schinkel, Michelle Michels, Alexander Hirsch

    American Journal of Cardiology   125 ( 9 )   1404 - 1412   2020年5月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    The etiology of chest pain in hypertrophic cardiomyopathy (HC) is diverse and includes coronary artery disease (CAD) as well as HC-specific causes. Myocardial bridging (MB) has been associated with HC, chest pain, and accelerated atherosclerosis. We compared HC patients with age-, gender- and CAD pre-test probability-matched outpatients presenting with chest pain to investigate differences in the presence of MB and CAD using coronary computed tomography angiography (CCTA). We studied 84 HC patients who underwent CCTA and compared these with 168 matched controls (age 54 ± 11 years, 70&#37; men, pre-test probability 12&#37; [5&#37; to 32&#37;]). MB, calcium score, plaque morphology and presence and extent of CAD were assessed for each patient. Linear mixed models were used to assess differences between cases and controls. MB was more often seen in HC patients (50&#37; vs 25&#37;, p <0.001). Calcium score and the presence of obstructive CAD were similar in both groups (9 [0 to 225] vs 4 [0 to 82] and 18&#37; vs 19&#37;; p = 0.22 and p = 0.82). In the HC group, MB was associated with pathogenic DNA variants (p = 0.04), but not with the presence of chest pain (74&#37; vs 76&#37;, p = 0.8), nor with worse outcome (log-rank p = 0.30). In conclusion, the prevalence and extent of CAD was equal among patients with and without HC, demonstrating that pre-test risk prediction using the CAD Consortium clinical risk score performs well in HC patients. MB was twice as prevalent in the HC group compared with matched controls, but was not associated with chest pain or decreased event-free survival in these patients.

    DOI: 10.1016/j.amjcard.2020.02.002

  • The reproducibility of measurements using a standardization phantom for the evaluation of fractional anisotropy (FA) derived from diffusion tensor imaging (DTI) 査読 国際誌

    Mitsuhiro Kimura, Hidetake Yabuuchi, Ryoji Matsumoto, Koji Kobayashi, Yasuo Yamashita, Kazuya Nagatomo, Ryoji Mikayama, Takeshi Kamitani, Koji Sagiyama, Yuzo Yamasaki

    Magnetic Resonance Materials in Physics, Biology and Medicine   33 ( 2 )   293 - 298   2020年4月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    Objectives: It is necessary to standardize the examination procedure and diagnostic criteria of diffusion tensor imaging (DTI). Thus, the purpose of this study was to examine the reproducibility of measurements using a standardization phantom composed of different fibre materials with different fibre densities (FDs) for the evaluation of fractional anisotropy (FA) derived from DTI. Materials and methods: Two types of fibre materials wrapped in heat-shrinkable tubes were used as fibre phantoms. We designed fibre phantoms with three different FDs of each fibre material. The standardization phantom was examined using DTI protocol six times a day, and each examination session was repeated once a month for 7 consecutive months. Fibre tracking was performed by setting regions of interest in the FA map, and FA was measured in each fibre phantom. Coefficients of variation (CVs) were used to evaluate the inter-examination reproducibility of FA values. Furthermore, Bland–Altman plots were used to evaluate the intra-operator reproducibility of FA measurements. Results: All CVs for each fibre phantom were within 2&#37; throughout the 7-month study of repeated DTI sessions. The high intra-operator reproducibility of the FA measurement was confirmed. Discussion: High reproducibility of measurements using a standardization phantom for the evaluation of FA was achieved.

    DOI: 10.1007/s10334-019-00776-w

  • 広範な梗塞を伴った乳腺葉状腫瘍の1例

    岩政 理花, 神谷 武志, 鷺山 幸二, 日野 卓也, 本田 浩, 山崎 誘三, 久保 真, 甲斐 昌也, 山元 英崇, 古賀 裕

    Japanese Journal of Radiology   38 ( Suppl. )   84 - 84   2020年2月

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    記述言語:日本語  

  • Detectability of the artery of Adamkiewicz on computed tomography angiography of the aorta by using ultra-high-resolution computed tomography 査読

    Takuya Hino, Takeshi Kamitani, Koji Sagiyama, Yuzo Yamasaki, Yuko Matsuura, Soichiro Tsutsui, Yuki Sakai, Tadashi Furuyama, Hidetake Yabuuchi

    Japanese Journal of Radiology   38 ( 7 )   658 - 665   2020年1月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    Purpose: To evaluate the detectability of AKA on aortic computed tomography angiography (CTA) using ultra-high-resolution computed tomography (UHRCT). Materials and methods: Twenty-eight patients were enrolled. They underwent aortic CTA with UHRCT (UHRCTA) and had previously undergone aortic conventional CTA (CCTA). The injection protocol of UHRCTA was the same as that of CCTA. The bolus tracking technique was used. UHRCTA images were reconstructed with adaptive iterative dose reduction (strong) and with forward-projected model-based iterative reconstruction solution. The matrix size and slice thickness on UHRCT were 1024 and 0.25 mm, respectively, and those on conventional CT were 512 and 0.5 or 0.67 mm, respectively. The UHRCTA and CCTA images were visually compared by using four scales. A score of 4 or 3 indicated that the AKA was assessable. In this instance, the contrast-to-noise ratios of each UHRCTA were measured. The exposure dose and signal-to-noise ratios were also investigated. Results: The AKA visualization scores obtained with UHRCTA with forward-projected model-based iterative reconstruction solution were significantly higher than those with adaptive iterative dose reduction (p = 0.018) and CCTA (p = 0.0024). Conclusion: UHRCT can contribute to the better visualization of the AKA on aortic CTA.

    DOI: 10.1007/s11604-020-00943-3

  • Correction to Development of a new phantom simulating extracellular space of tumor cell growth and cell edema for diffusion-weighted magnetic resonance imaging (Magnetic Resonance Materials in Physics, Biology and Medicine, (2020), 10.1007/s10334-019-00823-6) 査読 国際誌

    Ryoji Mikayama, Hidetake Yabuuchi, Ryoji Matsumoto, Koji Kobayashi, Yasuo Yamashita, Mitsuhiro Kimura, Takeshi Kamitani, Koji Sagiyama, Yuzo Yamasaki

    Magnetic Resonance Materials in Physics, Biology and Medicine   33 ( 4 )   515 - 516   2020年1月

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    記述言語:英語  

    The original version of this article unfortunately contained a mistake. In Table 1, second column of “Cell edema” should read as: 5&#37; (10 μm) 17&#37; (15 μm) 40&#37; (20 μm) The corrected Table 1 is placed in the next page.

    DOI: 10.1007/s10334-020-00830-y

  • Development of a new phantom simulating extracellular space of tumor cell growth and cell edema for diffusion-weighted magnetic resonance imaging 査読 国際誌

    Ryoji Mikayama, Hidetake Yabuuchi, Ryoji Matsumoto, Koji Kobayashi, Yasuo Yamashita, Mitsuhiro Kimura, Takeshi Kamitani, Koji Sagiyama, Yuzo Yamasaki

    Magnetic Resonance Materials in Physics, Biology and Medicine   33 ( 4 )   507 - 513   2020年1月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    Objective: A phantom for diffusion-weighted imaging is required to standardize quantitative evaluation. The objectives were to develop a phantom simulating various cell densities and to evaluate repeatability. Materials and methods: The acrylic fine particles with three different diameters were used to simulate human cells. Four-degree cell density components were developed by adjusting the volume of 10-μm particles (5, 20, 35, and 50&#37; volume, respectively). Two-degree components to simulate cell edema were also developed by adjusting the diameter without changing number (17&#37; and 40&#37; volume, respectively). Spearman’s rank correlation coefficient was used to find a significant correlation between apparent diffusion coefficient (ADC) and particle density. Coefficient of variation (CV) for ADC was calculated for each component for 6 months. A p value < 0.05 represented a statistically significance. Results: Each component (particle ratio of 5, 17, 20, 35, 40, and 50&#37; volume, respectively) presented ADC values of 1.42, 1.30, 1.30, 1.12, 1.09, and 0.89 (× 10−3 mm2/s), respectively. A negative correlation (r = − 0.986, p < 0.05) was observed between ADC values and particle ratio. CV for ADC was less than 5&#37;. Discussion: A phantom simulating the diffusion restriction correlating with cell density and size could be developed.

    DOI: 10.1007/s10334-019-00823-6

  • Low Radiation Dose and High Image Quality of 320-Row Coronary Computed Tomography Angiography Using a Small Dose of Contrast Medium and Refined Scan Timing Prediction

    Takashi Shirasaka, Michinobu Nagao, Yuzo Yamasaki, Tsukasa Kojima, Masatoshi Kondo, Hiroshi Hamasaki, Takeshi Kamitani, Toyoyuki Kato, Yoshiki Asayama

    JOURNAL OF COMPUTER ASSISTED TOMOGRAPHY   44 ( 1 )   7 - 12   2020年1月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    Objective The aim of the study was to investigate the feasibility of coronary computed tomography (CT) angiography with a low kilovoltage peak scan and a refined scan timing prediction using a small contrast medium (CM) dose. Methods In protocol A, 120-kVp scanning and a standard CM dose were used. The scan timing was fixed. In protocol B, 80 kVp and a 60% CM dose were used. The scan timing was determined according to the interval from the CM arrival to the peak time in the ascending aorta. We measured the CT number and recorded the radiation dose. Results Higher CT numbers were observed in the left circumflex (proximal, P = 0.0235; middle, P = 0.0007; distal, P < 0.0001) in protocol B compared with protocol A. The radiation dose in protocol B was significantly lower than in protocol A (2.2 +/- 0.9 vs 4.3 +/- 1.7 mSv). Conclusions Low-contrast, low-radiation dose, high-image quality coronary CT angiography can be performed with low kilovoltage peak scanning and a refined scan timing prediction.

    DOI: 10.1097/RCT.0000000000000951

  • Impact of machine-learning CT-derived fractional flow reserve for the diagnosis and management of coronary artery disease in the randomized CRESCENT trials 査読 国際誌

    Fay M.A. Nous, Ricardo P.J. Budde, Marisa M. Lubbers, Yuzo Yamasaki, Isabella Kardys, Tobias A. Bruning, Jurgen M. Akkerhuis, Marcel J.M. Kofflard, Bas Kietselaer, Tjebbe W. Galema, Koen Nieman

    European Radiology   30 ( 7 )   3692 - 3701   2020年1月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    Objective: To determine the potential impact of on-site CT-derived fractional flow reserve (CT-FFR) on the diagnostic efficiency and effectiveness of coronary CT angiography (CCTA) in patients with obstructive coronary artery disease (CAD) on CCTA. Methods: This observational cohort study included patients with suspected CAD who had been randomized to cardiac CT in the CRESCENT I and II trials. On-site CT-FFR was blindly performed in all patients with at least one ≥ 50&#37; stenosis on CCTA and no exclusion criteria for CT-FFR. We retrospectively assessed the effect of adding CT-FFR to the CT protocol in patients with a stenosis ≥ 50&#37; on CCTA in terms of diagnostic effectiveness, i.e., the number of additional tests required to determine the final diagnosis, reclassification of the initial management strategy, and invasive coronary angiography (ICA) efficiency, i.e., ICA rate without ≥ 50&#37; CAD. Results: Fifty-three patients out of the 372 patients (14&#37;) had at least one ≥ 50&#37; stenosis on CCTA of whom 42/53 patients (79&#37;) had no exclusion criteria for CT-FFR. CT-FFR showed a hemodynamically significant stenosis (≤ 0.80) in 27/53 patients (51&#37;). The availability of CT-FFR would have reduced the number of patients requiring additional testing by 57&#37;-points compared with CCTA alone (37/53 vs. 7/53, p < 0.001). The initial management strategy would have changed for 30 patients (57&#37;, p < 0.001). Reserving ICA for patients with a CT-FFR ≤ 0.80 would have reduced the number of ICA following CCTA by 13&#37;-points (p = 0.016). Conclusion: Implementation of on-site CT-FFR may change management and improve diagnostic efficiency and effectiveness in patients with obstructive CAD on CCTA. Key Points: • The availability of on-site CT-FFR in the diagnostic evaluation of patients with obstructive CAD on CCTA would have significantly reduced the number of patients requiring additional testing compared with CCTA alone. • The implementation of on-site CT-FFR would have changed the initial management strategy significantly in the patients with obstructive CAD on CCTA. • Restricting ICA to patients with a positive CT-FFR would have significantly reduced the ICA rate in patients with obstructive CAD on CCTA.

    DOI: 10.1007/s00330-020-06778-w

  • Characterization of parotid gland tumors added value of permeability MR imaging to DWI and DCE-MRI 査読

    Hidetake Yabuuchi, Takeshi Kamitani, Koji Sagiyama, Yuzo Yamasaki, Tomoyuki Hida, Yuko Matsuura, Takuya Hino, Yuriko Murayama, Ryuji Yasumatsu, Hidetaka Yamamoto

    European Radiology   2020年

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    Objectives: To determine added value of permeability MRI in parotid tumor characterization to T2-weighted imaging (T2WI), semi-quantitative analysis of time-intensity curve (TIC), and intra-voxel incoherent motion diffusion-weighted imaging (IVIM-DWI). Methods: This retrospective study was approved by the institutional review board, and the informed consent was waived. Sixty-one parotid tumors in 61 patients were examined using T2WI, IVIM-DWI, and permeability MRI. TIC patterns were categorized as persistent, washout, or plateau. Signal intensity ratio of lesion-to-muscle on T2WI, apparent diffusion coefficients (ADCs), D and f values from IVIM-DWI, and Ktrans, kep, Ve, and Vp values from permeability MRI were measured. Multiple comparisons were applied to determine whether any differences among 4 histopathologic types (pleomorphic adenomas, Warthin’s tumors, other benign tumors, and malignant tumors) existed. Diagnostic accuracy was compared before and after modification diagnosis referring to permeability MRI. In a validation study, 60 parotid tumors in 60 patients were examined. Results: ADC and D values of malignant tumors were significantly lower than those of benign tumors other than Warthin’s tumors, but higher than those of Warthin’s tumors. kep and Vp values of Warthin’s tumors were significantly higher than those of malignant tumors. Multivariate analyses showed that TIC pattern, D, and kep values were suitable parameters. McNemar’s test showed a significant increase of sensitivity (11/12, 92%) and specificity (46/49, 94%) with adding kep. The validation study yielded high sensitivity (14/16, 88%) and specificity (41/44, 93%). Conclusion: Permeability MRI offers added value to IVIM-MRI and semi-quantitative TIC analysis of DCE-MRI in characterization of parotid tumors Key Points: • Permeability MR imaging offers added value in the characterization of parotid gland tumors in combination with semi-quantitative TIC analysis and IVIM analyses with D parameter. • The combination of TIC pattern, D, and kepmight facilitate accurate characterization of parotid gland tumor, thereby avoiding unnecessary surgery for benign tumors or delayed treatment for malignant tumors. • A combination of permeability and diffusion MR imaging can be used to guide the selection of an appropriate biopsy site.

    DOI: 10.1007/s00330-020-07004-3

  • Preoperative threshold for normalizing right ventricular volume after transcatheter closure of adult atrial septal defect 査読

    Shintaro Umemoto, Ichiro Sakamoto, Kohtaro Abe, Ayako Ishikita, Yuzo Yamasaki, Ken Ichi Hiasa, Tomomi Ide, Hiroyuki Tsutsui

    Circulation Journal   84 ( 8 )   1312 - 1319   2020年

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    Background: The latest guidelines recommend early intervention in adult atrial septal defect (ASD) patients with signs of right ventricular (RV) enlargement. However, the criteria of RV enlargement for optimal intervention remain unclear. We investigated the preoperative determinants for normalizing the RV volume after transcatheter closure of ASD in adults. Methods and Results: We retrospectively analyzed 52 ASD patients who underwent transcatheter closure. Cardiac magnetic resonance imaging (CMR) measured RV volume before and 1 year after the closure. The patients were divided into normalized (postoperative RV end-systolic volume index [RVESVI] <47 mL/m2 and end-diastolic volume index [RVEDVI] <108 mL/m2) and non-normalized (postoperative RVESVI ≥47 mL/m2 or RVEDVI ≥108 mL/m2) groups. Preoperative RVESVI was significantly smaller (72 mL/m2 vs. 80 mL/m2) and RVEF was higher (56% vs. 51%) in the normalized group compared with the non-normalized group. Receiver-operating characteristic analysis for the normalization of postoperative RV volume showed that the preoperative threshold value of RVESVI was 75 mL/m2. In addition, multivariate analysis showed that preoperative RVESVI was an independent predictor for normalization of RV volume. Conclusions: Preoperative RVESVI is an independent predictor for normalization of RV volume at 1 year after transcatheter closure of ASD in adults. Early intervention before RVESVI reaches 75 mL/m2 may confer optimal timing for normalizing RV volume.

    DOI: 10.1253/circj.CJ-20-0136

  • Feature-Tracking MRI Fractal Analysis of Right Ventricular Remodeling in Adults with Congenitally Corrected Transposition of the Great Arteries. 国際誌

    Masateru Kawakubo, Michinobu Nagao, Umiko Ishizaki, Yumi Shiina, Kei Inai, Yuzo Yamasaki, Masami Yoneyama, Shuji Sakai

    Radiology. Cardiothoracic imaging   1 ( 4 )   e190026   2019年10月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    PURPOSE: To assess a recently available technique for quantification of right ventricular (RV) trabeculae that is based on fractal analysis performed by using cardiac MRI feature tracking, in patients with congenitally corrected transposition of the great arteries (cc-TGA). MATERIALS AND METHODS: A total of 19 patients (eight men, 11 women; mean age, 35 years ± 10 [standard deviation]) with consecutive cc-TGA who underwent cardiac MRI were enrolled in the study. For analysis, patients were divided into two groups: six patients (four men, two women; mean age, 34 years ± 14) with an end-systolic RV volume index higher than 72 mL/m2 (indicative of adverse RV remodeling) and 13 patients (four men, nine women; mean age, 36 years ± 9) in whom this index was lower than or equal to 72 mL/m2 (indicative of adapted RV). The following outcomes were quantified in the midsection of the RV: fractional fractal dimension (FD) and diastolic FD, circumferential strain, and radial strain. Receiver operating characteristic (ROC) analysis was performed to determine the cutoff FD values for the detection of adverse RV remodeling. Correlations among fractional FD, diastolic FD, circumferential strain, and radial strain were calculated by using Pearson correlation coefficient (r) analysis. RESULTS: The following ROC values were identified for fractional and diastolic FD: cutoff, 0.09 and 1.39, respectively; area under the ROC curve, 0.95 and 0.68, respectively; sensitivity, 1.00 and 0.33, respectively; and specificity, 0.92 and 1.00, respectively. Fractional FD correlated with circumferential strain and radial strain (r = -0.70 and 0.69, respectively; P < .01), as did diastolic FD (r = 0.37 and -0.38, respectively; P < .05). CONCLUSION: The fractional FD derived from cardiac MRI feature-tracking analysis correlates with adverse RV remodeling, including a changed strain pattern and trabeculae, in patients with cc-TGA.© RSNA, 2019.

    DOI: 10.1148/ryct.2019190026

  • Clinical usefulness of right ventricular 3D area strain in the assessment of treatment effects of balloon pulmonary angioplasty in chronic thromboembolic pulmonary hypertension comparison with 2D feature-tracking MRI 査読 国際誌

    Masateru Kawakubo, Yuzo Yamasaki, Takeshi Kamitani, Koji Sagiyama, Yuko Matsuura, Takuya Hino, Kohtaro Abe, Kazuya Hosokawa, Hidetake Yabuuchi, Hiroshi Honda

    European Radiology   29 ( 9 )   4583 - 4592   2019年9月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    Objectives: To evaluate the usefulness of right ventricular (RV) area strain analysis via cardiac MRI (CMRI) as a tool for assessing the treatment effects of balloon pulmonary angioplasty (BPA) in inoperable chronic thromboembolic pulmonary hypertension (CTEPH), RV area strain was compared to two-dimensional (2D) strain with feature-tracking MRI (FTMRI) before and after BPA. Methods: We retrospectively analyzed 21 CTEPH patients who underwent BPA. End-systolic global area strain (GAS), longitudinal strain (LS), circumferential strain (CS), and radial strain (RS) were measured before and after BPA. Changes in GAS and RV ejection fraction (RVEF) values after BPA were defined as ΔGAS and ΔRVEF. Receiver operating characteristic (ROC) analyses were performed to determine the optimal cutoff of the strain at after BPA for detection of improved patients with decreased mean pulmonary artery pressure (mPAP) less than 30 mmHg and increased RVEF more than 50&#37;. Results: ROC analysis revealed the optimal cutoffs of strains (GAS, LS, CS, and RS) for identifying improved patients with mPAP < 30 mmHg (cutoff (&#37;) = − 41.2, − 13.8, − 16.7, and 14.4: area under the curve, 0.75, 0.56, 0.65, and 0.75) and patients with RVEF > 50&#37; (cutoff (&#37;) = − 37.2, − 29.5, − 2.9, and 14.4: area under the curve, 0.81, 0.60, 0.56, and 0.56). Conclusions: Area strain analysis via CMRI may be a more useful tool for assessing the treatment effects of BPA in patients with CTEPH than 2D strains with FTMRI. Key Points: • Area strain values can detect improvement of right ventricular (RV) pressure and function after balloon pulmonary angioplasty (BPA) equally or more accurately than two-dimensional strains. • Area strain analysis is a useful analytical method that reflects improvements in complex RV myocardial deformation by BPA. • Area strain analysis is a robust method with reproducibility equivalent to that of 2D strain analysis.

    DOI: 10.1007/s00330-019-6008-3

    リポジトリ公開URL: http://hdl.handle.net/2324/4479727

  • Elevated non-invasive liver fibrosis markers and risk of liver carcinoma in adult patients after repair of tetralogy of Fallot 査読 国際誌

    Kenichiro Yamamura, Ichiro Sakamoto, Eiji Morihana, Yuichiro Hirata, Hazumu Nagata, Yuzo Yamasaki, Yukihiko Okumura, Kenichi Kouhashi, Kazuhiro Koto, Hiroyuki Tsutsui, Shoichi Ohga

    International Journal of Cardiology   287   121 - 126   2019年7月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    Background: Congestive hepatopathy and hepatocellular carcinoma is a serious complication after Fontan procedure. Liver fibrosis due to hepatic congestion could occur also in adult patients after repair of tetralogy of Fallot (rTOF). However, the incidence and severity remain unclear. Methods: A total of 111 patients with adult congenital heart disease between 2009 and 2016 were enrolled. Liver fibrosis markers and hemodynamic parameters assessed by cardiac magnetic resonance imaging and catheterization were analyzed in 50 rTOF patients having significant pulmonary regurgitation and/or stenosis, 50 Fontan patients and 11 controls. Results: Liver fibrosis markers in patients with rTOF were significantly higher than controls, and tended to be lower than Fontan patients (median, hyaluronic acid: 25.8 vs. 15.9 vs. 40.8, type IV collagen: 129 vs. 113 vs. 166, ng/mL, p < 0.05, respectively). Patients with rTOF showed abnormal hyaluronic acid levels more frequently than controls, and less frequently than Fontan patients (22&#37; vs. 0&#37; vs. 38&#37;, respectively, p < 0.05). Multivariate analyses indicated a positive association of right atrial pressure with type IV-collagen or hyaluronic acid levels (each, p < 0.001, p = 0.003). Abdominal ultrasonography revealed hepatic congestion in 50&#37; of rTOF patients tested. Liver biopsy of the two rTOF patients with highest hyaluronic acid levels showed pathological evidence of moderate and severe (F2 and F3)liver fibrosis and one had combined hepatocellular and cholangiocarcinoma. Conclusions: We first demonstrated elevated liver fibrosis markers in adult patients with rTOF. These levels may help to predict the progressive liver disease as well as consider the timing of pulmonary valve replacement.

    DOI: 10.1016/j.ijcard.2019.04.032

  • Evaluation of coronary artery variations using dual-source coronary computed tomography angiography in neonates with transposition of the great arteries 査読

    Yuko Odawara, Nobuko Kawamura, Yuzo Yamasaki, Joji Hashimoto, Shiro Ishikawa, Hiroshi Honda

    Japanese Journal of Radiology   37 ( 4 )   308 - 314   2019年4月

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    記述言語:英語  

    Objective: The purpose of this study was to investigate whether the origins and courses of the coronary arteries could be better assessed using ECG-gated dual-source computed tomography (CT) than with echocardiography in neonates with transposition of the great arteries (TGA). Methods: A total of 17 neonates within 14 days old who underwent both echocardiography and retrospective ECG-gated coronary CT angiography were retrospectively reviewed. The patients were sedated and intubated during CT examinations, and CT images were obtained with a breath-hold. CT images were reconstructed by multiple cardiac phases, and the coronary artery assessment was performed in the most static phase. Coronary anomalies were classified by Shaher’s classification and validated by surgical findings. Results: CT correctly classified 16 of 17 cases (Shaher type 1: 7, type 2: 4, type 9: 3, type 3: 1, type 4: 2), whereas echocardiography classified only 8 of 17 cases correctly. Dual-source CT had a significantly higher diagnostic ability than echocardiography (p = 0.0078). Conclusion: Dual-source coronary CT angiography has a higher diagnostic ability than echocardiography in the assessment of the origins and courses of the coronary arteries in neonates with TGA.

    DOI: 10.1007/s11604-018-00807-x

  • Feasible scan timing for 320-row coronary CT angiography generated by the time to peak in the ascending aorta 査読

    Takashi Shirasaka, Michinobu Nagao, Yuzo Yamasaki, Tsukasa Kojima, Masatoshi Kondo, Yamato Shimomiya, Takeshi Kamitani, Hiroshi Honda

    Clinical Imaging   54   153 - 158   2019年3月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    Purpose: A 320-row CT scanner can briefly scan the entire heart. Therefore, the feasible scan timing is required. The aim of this study was to propose a refined method for feasible scan timing for coronary CT angiography (CCTA) using a time-density curve of the ascending aorta (AAo). Methods: One-hundred and twenty-nine patients were prospectively enrolled. All patients were performed test-bolus method. For the initial 65 patients, the scan timing was determined as a 3.0 s delay at the peak time in the AAo, which was defined as the conventional protocol (COV-P). For the next 64 patients, a scan timing of 1.0, 3.0, or 5.0 s delay was determined according to the interval from the contrast media arrival to peak time in the AAo, which was defined as the arrival to peak protocol (AP-P). The optimal scan timing was identified by the measurement of CT number in the left atrium, left ventricle, AAo, and descending aorta. The coronary enhancement and heterogeneity were compared between the two protocols. Results: The optimal scan timing was significantly higher in the AP-P than in the COV-P (85.9&#37; vs. 61.5&#37;, p = 0.0017). The CT number in the left circumflex artery (LCX) was significantly higher in the AP-P than the COV-P (344.5 Hounsfield units vs. 316.3 Hounsfield units, p = 0.0484). The heterogeneous index of the LCX was significantly greater for the COV-P than the AP-P (−36.8 vs. –25.8, p = 0.0028). Conclusions: The AP-P can be used to determine the optimal scan timing for CCTA and contributes to stable coronary enhancement.

    DOI: 10.1016/j.clinimag.2019.01.005

  • Denosumab治療後の骨巨細胞腫の画像所見

    進 政太郎, 神谷 武志, 鷺山 幸二, 山崎 誘三, 馬場 眞吾, 本田 浩, 川波 哲, 松本 嘉寛, 小田 義直, 藪内 英剛

    Japanese Journal of Radiology   37 ( Suppl. )   62 - 62   2019年2月

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    記述言語:日本語  

  • PET/MRIが病変内部の評価に有用であった胸壁由来軟部腫瘍の1例

    日野 卓也, 神谷 武志, 鷺山 幸二, 山崎 誘三, 本田 浩, 川波 哲, 渡邊 祐司, 大塚 洋, 藪内 英剛

    Japanese Journal of Radiology   37 ( Suppl. )   74 - 74   2019年2月

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    記述言語:日本語  

  • 低体温症死亡例のCT所見

    進 政太郎, 池田 典昭, 牛島 泰宏, 神谷 武志, 鷺山 幸二, 山崎 誘三, 本田 浩, 川波 哲

    Japanese Journal of Radiology   37 ( Suppl. )   69 - 69   2019年2月

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    記述言語:日本語  

  • Localized malignant pleural mesothelioma mimicking an anterior mediastinal tumor 査読

    Takuya Hino, Takeshi Kamitani, Koji Sagiyama, Yuzo Yamasaki, Isamu Okamoto, Tetsuzo Tagawa, Kayo Ijichi, Hidetaka Yamamoto, Hidetake Yabuuchi, Hiroshi Honda

    European Journal of Radiology Open   6   72 - 77   2019年1月

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    記述言語:英語  

    Localized malignant pleural mesothelioma (LMPM) is an extremely rare tumor. We report the case of a 40-year-old Japanese male with an LMPM mimicking an anterior mediastinal tumor due to invasion to the anterior mediastinum, and we discuss mainly the differentiation of LMPM from an anterior mediastinal tumor. The present tumor had a long shape along the pleura, and LMPM could be one of the differential diagnoses.

    DOI: 10.1016/j.ejro.2019.01.006

  • Clinical application of radiation dose reduction for head and neck CT 査読 国際誌

    Hidetake Yabuuchi, Takeshi Kamitani, Koji Sagiyama, Yuzo Yamasaki, Yuko Matsuura, Takuya Hino, Soichiro Tsutsui, Masatoshi Kondo, Takashi Shirasaka, Hiroshi Honda

    European Journal of Radiology   107   209 - 215   2018年10月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    CT has advantages over MRI including rapid acquisition, and high spatial resolution for detailed anatomical information on the head and neck region. Therefore, CT is the first choice of imaging modality for the larynx, hypopharynx, sinonasal region, and temporal bone. Introduction of multi-detector CT (MDCT) scanning has allowed reduction in scan time, availability of isovoxel image, and relevant 3D image reconstruction; however, it leads to over-ranging due to helical scanning, and increased radiation dose due to 3D-volume imaging, and small detector size. In head and neck CT, reduction and optimization of radiation dose is very important, especially for prevention of the occurrence of cataract development due to radiation to lens, and prevention of the development of malignant tumour development from radiosensitive organs such as the salivary gland, thyroid gland, and retina, especially in children. The goal of dose reduction is “as low as reasonably achievable” (ALARA) level with preservation of appropriate image quality in clinical practice. Reduction of radiation dose per examination is essential; however, indication of repeat examination such as perfusion CT, dynamic contrast-enhanced CT, and follow-up study of malignant tumours should be optimized.

    DOI: 10.1016/j.ejrad.2018.08.021

  • Computed tomography features of resected lung adenocarcinomas with spread through air spaces 査読 国際誌

    Y. Yamada, G. Toyokawa, T. Tagawa, T. Kamitani, Y. Yamasaki, F. Shoji, K. Yamazaki, S. Takeo, Y. Oda

    Annals of oncology : official journal of the European Society for Medical Oncology   29 ( 4 )   viii643 - 1676   2018年10月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    BACKGROUND: Spread through air spaces (STAS) is a recently recognized invasive pattern of lung cancer defined as "micropapillary clusters, solid nests, or single cells beyond the edge of the tumor into air spaces." Since STAS has been shown to be a significant prognosticator for the postoperative survival, predicting STAS preoperatively by computed tomography (CT) might help determine the optimum surgical procedures. METHODS: Information on STAS and preoperative CT was available in 327 patients with resected lung adenocarcinomas. STAS was defined as tumor cells within air spaces in the lung parenchyma beyond the edge of the main tumor. The association of STAS with CT characteristics, such as vascular convergence, ground-glass opacity (GGO), air bronchogram, notch, pleural indentation, spiculation, and cavitation, was analyzed. RESULTS: Among the 327 patients with resected adenocarcinoma, 191 (58.4&#37;) were positive for STAS. A univariable analysis demonstrated that STAS-positive adenocarcinomas were significantly associated with a larger radiologic tumor diameter (P = .02), the presence of vascular convergence (P < .01), notch (P < .01), pleural indentation (P = .03), spiculation (P < .01), and the absence of GGO (P < .01) compared with STAS-negative ones. In a multivariable analysis, the presence of notch (P = .01) and the absence of GGO (P < .01) were shown to be significantly associated with the STAS phenomenon. The odds ratio for STAS of notch-positive and GGO-negative adenocarcinomas against notch-negative and GGO-positive ones was 5.01 (P < .01). CONCLUSIONS: The presence of notch and the absence of GGO were independently associated with the STAS phenomenon. These results will prove helpful in identifying STAS-positive adenocarcinoma by CT before surgical resection.

    DOI: 10.1093/annonc/mdy301.008

  • Computed tomography features of resected lung adenocarcinomas with spread through air spaces 査読 国際誌

    Gouji Toyokawa, Yuichi Yamada, Tetsuzo Tagawa, Takeshi Kamitani, Yuzo Yamasaki, Mototsugu Shimokawa, Yoshinao Oda, Yoshihiko Maehara

    Journal of Thoracic and Cardiovascular Surgery   156 ( 4 )   1670 - 1676.e4   2018年10月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    Background: Spread through air spaces (STAS) is a recently recognized invasive pattern of lung cancer defined as “micropapillary clusters, solid nests, or single cells beyond the edge of the tumor into air spaces.” Since STAS has been shown to be a significant prognosticator for the postoperative survival, predicting STAS preoperatively by computed tomography (CT) might help determine the optimum surgical procedures. Methods: Information on STAS and preoperative CT was available in 327 patients with resected lung adenocarcinomas. STAS was defined as tumor cells within air spaces in the lung parenchyma beyond the edge of the main tumor. The association of STAS with CT characteristics, such as vascular convergence, ground-glass opacity (GGO), air bronchogram, notch, pleural indentation, spiculation, and cavitation, was analyzed. Results: Among the 327 patients with resected adenocarcinoma, 191 (58.4&#37;) were positive for STAS. A univariable analysis demonstrated that STAS-positive adenocarcinomas were significantly associated with a larger radiologic tumor diameter (P =.02), the presence of vascular convergence (P <.01), notch (P <.01), pleural indentation (P =.03), spiculation (P <.01), and the absence of GGO (P <.01) compared with STAS-negative ones. In a multivariable analysis, the presence of notch (P =.01) and the absence of GGO (P <.01) were shown to be significantly associated with the STAS phenomenon. The odds ratio for STAS of notch-positive and GGO-negative adenocarcinomas against notch-negative and GGO-positive ones was 5.01 (P <.01). Conclusions: The presence of notch and the absence of GGO were independently associated with the STAS phenomenon. These results will prove helpful in identifying STAS-positive adenocarcinoma by CT before surgical resection.

    DOI: 10.1016/j.jtcvs.2018.04.126

  • Patient-related factors influencing detectability of coronary arteries in 320-row CT angiography in infants with complex congenital heart disease 査読 国際誌

    Yuzo Yamasaki, Satoshi Kawanami, Takeshi Kamitani, Koji Sagiyama, Seitaro Shin, Takuya Hino, Hazumu Nagata, Hidetake Yabuuchi, Michinobu Nagao, Hiroshi Honda

    International Journal of Cardiovascular Imaging   34 ( 9 )   1485 - 1491   2018年9月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    To investigate the performance of second-generation 320-row computed tomographic (CT) angiography (CTA) in detecting coronary arteries and identify factors influencing visibility of the coronary arteries in infants with complex congenital heart disease (CHD). Data of 60 infants (aged 0–2 years, median 2 months) with complex CHD who underwent examination using 320-row CTA with low-dose prospective electrocardiogram-triggered volume target scanning were reviewed. The coronary arteries of each infant were assessed using a 0–4-point scoring system based on the number of coronary segments with a visible course. Clinical parameters, the CT value in the ascending aorta, image noise, and the radiation dose were subjected to univariate and multivariate analyses. The mean coronary score for all examinations was 2.6 ± 1.5 points. The mean attenuation in the ascending aorta was 306.7 ± 66.2 HU and the mean standard deviation was 21.7 ± 4.4. The mean effective radiation dose was 1.27 ± 0.39 mSv. Multivariate regression analysis showed significant correlations between coronary score and body weight (p < 0.05) and between coronary score and the CT value in the ascending aorta (p < 0.02). Second-generation 320-row CTA with prospective electrocardiogram-triggered volume target scanning and hybrid iterative reconstruction allows good visibility of the coronary arteries in infants with complex CHD. Body weight and the CT value in the ascending aorta are important factors influencing the visibility of the coronary arteries in infants.

    DOI: 10.1007/s10554-018-1363-8

  • Free-breathing 320-row computed tomographic angiography with low-tube voltage and hybrid iterative reconstruction in infants with complex congenital heart disease 査読

    Yuzo Yamasaki, Satoshi Kawanami, Takeshi Kamitani, Koji Sagiyama, Seitaro Shin, Takuya Hino, Kenichiro Yamamura, Hidetake Yabuuchi, Michinobu Nagao, Hiroshi Honda

    Clinical Imaging   50   147 - 156   2018年7月

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    記述言語:英語  

    We explored the clinical value of low-tube voltage prospective second-generation ECG-triggered 320-row CT angiography in infants with complex CHD (37 male, 23 female, aged 0–2 years). The diagnostic accuracy of 320-row CT in complex CHD was 99.4&#37; for intracardiac cardiovascular malformations, 99.8&#37; for extracardiac cardiovascular malformations, and 100&#37; for other malformations. The average subjective overall image quality score for cardiac structures was 3.7 ± 0.5 points. Second-generation 320-row CT angiography with low-tube voltage and prospective ECG-triggered volume target scanning allows accurate diagnosis of cardiovascular anomalies in infants with complex CHD.

    DOI: 10.1016/j.clinimag.2018.02.008

  • Noninvasive quantification of left-to-right shunt by phase contrast magnetic resonance imaging in secundum atrial septal defect the effects of breath holding and comparison with invasive oximetry 査読 国際誌

    Yuzo Yamasaki, Satoshi Kawanami, Takeshi Kamitani, Koji Sagiyama, Ichiro Sakamoto, Hiasa Ken-Ichi, Hidetake Yabuuchi, Michinobu Nagao, Hiroshi Honda

    International Journal of Cardiovascular Imaging   34 ( 6 )   931 - 937   2018年6月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    To investigate the effect of breath-holding on left-to-right shunts in patients with a secundum atrial septal defect (ASD). Thirty-five consecutive patients with secundum ASDs underwent right heart catheterization and invasive oximetry. Phase-contrast magnetic resonance imaging (MRI) was performed for the main pulmonary artery and ascending aorta. All measurements were obtained during free breathing (FB) (quiet breathing; no breath-hold), expiratory breath-hold (EBH), and inspiratory breath-hold (IBH). Pulmonary circulation flow (Qp) and systemic circulation flow (Qs) were calculated by multiplying the heart rate by the stroke volume. Measurements during FB, EBH, and IBH were compared, and the differences compared to invasive oximetry were evaluated. There were significant differences among the measurements during FB, EBH, and IBH for Qp (FB, 7.70 ± 2.68; EBH, 7.18 ± 2.34; IBH, 6.88 ± 2.51 l/min); however, no significant difference was found for Qs (FB, 3.44 ± 0.74; EBH, 3.40 ± 0.83; IBH, 3.40 ± 0.86 l/min). There were significant differences among the measurements during FB, EBH, and IBH for Qp/Qs (FB, 2.38 ± 1.12; EBH, 2.24 ± 0.95; IBH, 2.14 ± 0.97). Qp/Qs during FB and EBH correlated better with Qp/Qs measured by invasive oximetry than did IBH. The limit of agreement was smaller for EBH than for FB and IBH. In patients with secundum ASDs, Qp/Qs significantly decreased with breath-holding. The accuracy of the Qp/Qs measurement by MRI compared with invasive oximetry during EBH was higher than during FB and IBH.

    DOI: 10.1007/s10554-018-1297-1

  • Balloon pulmonary angioplasty relieves haemodynamic stress towards untreated-side pulmonary vasculature and improves its resistance in patients with chronic thromboembolic pulmonary hypertension 査読 国際誌

    Kazuya Hosokawa, Kotaro Abe, Koshin Horimoto, Yuzo Yamasaki, Michinobu Nagao, Hiroyuki Tsutsui

    EuroIntervention   13 ( 17 )   2069 - 2076   2018年4月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    Aims: Chronic thromboembolic pulmonary hypertension (CTEPH) is characterised by organised thrombotic obliteration of major vessels and small-vessel arteriopathy in the non-thrombosed vessels. The aim of this study was to investigate the impact of balloon pulmonary angioplasty (BPA) on the non-BPA-side pulmonary vasculature in patients with CTEPH. Methods and results: This study explored the outcomes of 20 unilateral BPA sessions in 13 CTEPH patients. We measured the pulmonary vascular resistance (PVR), pulmonary artery (PA) flow in the BPA-side and non-BPA-side lungs, respectively, using phase contrast MRI and cardiac catheterisation. The interval from BPA to the follow-up evaluation was 92.8±52.0 days. A single session of BPA decreased mean PA pressure from 37.4±6.2 to 30.9±6.5 mmHg (p<0.001). In the BPA side, BPA increased the PA flow from 1.58±0.65 to 1.95±0.62 L/min (p=0.001) and decreased the PVR from 27.3±27.4 to 14.4±9.0 Wood units (p=0.004). In contrast, it decreased both the non-BPA-side PA flow from 2.25±0.64 to 1.90±0.23 L/min (p=0.008) and the non-BPA-side PVR from 14.8±6.6 to 12.8±3.9 Wood units (p=0.01). Conclusions: BPA could relieve haemodynamic stress towards the non-BPA-side vasculature and decrease its PVR in patients with CTEPH, suggesting that it can suppress or regress the progression of the small-vessel arteriopathy in non-BPA-side vasculature, presumably due to haemodynamic unloading.

    DOI: 10.4244/EIJ-D-17-00888

  • Dynamic flow imaging using 320-detector row CT and motion coherence analysis in coronary aneurysms associated with Kawasaki disease 査読 国際誌

    Yamato Shimomiya, Michinobu Nagao, Yuzo Yamasaki, Takashi Shirasaka, Masatoshi Kondo, Tsukasa Kojima, Akihiro Nishie, Kenichiro Yamamura, Hiroshi Honda

    Cardiology in the Young   28 ( 3 )   416 - 420   2018年3月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    Introduction We propose a new dynamic flow imaging using 320-detector row CT, and investigate the assessment of coronary flow in aneurysms of Kawasaki disease in adulthood. Methods Six patients with Kawasaki disease and coronary aneurysms associated (26.7 years old) and six controls were enrolled. Dynamic coronary CT angiography with 320-row CT was continuously performed at mid-diastole throughout 15-25 cardiac cycles with prospective Electrocardiogram gating after injection of contrast media. Dynamic data sets of 15-25 cycles were computed into 90-100 data sets by motion coherence image processing. Next, time-density curves for coronary arteries were calculated for all the phases. On the basis of the maximum slope method, coronary flow index was defined as the ratio of the maximum upslope of the attenuation of coronary arteries to the upslope of the attenuation of ascending aorta on the time-density curves. Coronary flow indexes for the proximal and distal sites of coronary arteries and intra-aneurysm were measured.

    DOI: 10.1017/S1047951117002293

  • 頭頸部滑膜肉腫の1例

    岸川 浩尚, 神谷 武志, 鷺山 幸二, 山崎 誘三, 亀井 俊祐, 大賀 才路, 本田 浩, 川波 哲, 藪内 英剛, 佐藤 方宣

    Japanese Journal of Radiology   36 ( Suppl. )   76 - 76   2018年2月

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    記述言語:日本語  

  • CTとMRIでの心室容積計測に関するin vitroでの検討

    山崎 誘三, 神谷 武志, 鷺山 幸二, 亀井 俊佑, 本田 浩, 川波 哲, 坂本 一郎, 山村 健一郎, 薮内 英剛

    Japanese Journal of Radiology   36 ( Suppl. )   72 - 72   2018年2月

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    記述言語:日本語  

  • 非動脈硬化性高齢大動脈弁狭窄の大動脈基部形態

    長尾 充展, 川波 哲, 山崎 誘三, 神谷 武志, 山之内 寅彦, 鷺山 幸二, 本田 浩

    Japanese Journal of Radiology   36 ( Suppl. )   68 - 68   2018年2月

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    記述言語:日本語  

  • Prediction of therapeutic effect of chemotherapy for NSCLC using dual-input perfusion CT analysis Comparison among bevacizumab treatment, two- agent platinum-based therapy without bevacizumab, and other non- bevacizumab treatment groups 査読 国際誌

    Hidetake Yabuuchi, Satoshi Kawanami, Eiji Iwama, Isamu Okamoto, Takeshi Kamitani, Koji Sagiyama, Yuzo Yamasaki, Hiroshi Honda

    Radiology   286 ( 2 )   685 - 695   2018年2月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    Purpose: To determine whether dual-input perfusion computed tomography (CT) can predict therapeutic response and prognosis in patients who underwent chemotherapy for non-small cell lung cancer (NSCLC). Materials and Methods: The institutional review board approved this study and informed consent was obtained. Sixty-six patients with stage III or IV NSCLC (42 men, 24 women; mean age, 63.4 years) who underwent chemotherapy were enrolled. Patients were separated into three groups: those who received chemotherapy with bevacizumab (BV) (n = 20), those who received two-agent platinum-based therapy without BV (n = 25), and those who received other non-BV treatment (n = 21). Before treatment, pulmonary artery perfusion (PAP) and bronchial artery perfusion (BAP) of the tumors were calculated. Predictors of tumor reduction after two courses of chemotherapy and prognosis were identified by using univariate and multivariate analyses. Covariates included were age, sex, patient's performance status, baseline maximum diameter of the tumor, clinical stage, pretreatment PAP, and pretreatment BAP. For multivariate analyses, multiple linear regression analysis for tumor reduction rate and Cox proportional hazards model for prognosis were performed, respectively. Results: Pretreatment BAP was independently correlated with tumor reduction rate after two courses of chemotherapy in the BV treatment group (P = .006). Pretreatment BAP was significantly associated with a highly cumulative risk of death (P = .006) and disease progression after chemotherapy (P = .015) in the BV treatment group. Pretreatment PAP and clinical parameters were not significant predictors of therapeutic effect or prognosis in three treatment groups. Conclusion: Pretreatment BAP derived from dual-input perfusion CT seems to be a promising tool to help predict responses to chemotherapy with BV in patients with NSCLC.

    DOI: 10.1148/radiol.2017162204

  • 心房中隔欠損におけるPhase contrast MRIを用いたQp/Qs評価 息止めの違いによる比較

    山崎 誘三, 川波 哲, 神谷 武志, 鷺山 幸二, 進 政太郎, 坂本 一郎, 藪内 英剛, 本田 浩

    日独医報   62 ( 1 )   84 - 84   2017年9月

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    記述言語:日本語  

  • 限局性悪性中皮腫の1例

    日野 卓也, 川波 哲, 神谷 武志, 鷺山 幸二, 山崎 誘三, 藪内 英剛, 田川 哲三, 岡本 勇, 川元 英崇, 本田 浩

    日本医学放射線学会秋季臨床大会抄録集   53回   S528 - S528   2017年8月

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    記述言語:日本語  

  • Quantification of myocardial oxygenation in heart failure using blood-oxygen-level-dependent T2* magnetic resonance imaging Comparison with cardiopulmonary exercise test 査読 国際誌

    Michinobu Nagao, Yuzo Yamasaki, Satoshi Kawanami, Takeshi Kamitani, Koji Sagiyama, Taiki Higo, Tomomi Ide, Atsushi Takemura, Umiko Ishizaki, Kenji Fukushima, Yuji Watanabe, Hiroshi Honda

    Magnetic Resonance Imaging   39   138 - 143   2017年6月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    Purpose Quantification of myocardial oxygenation (MO) in heart failure (HF) has been less than satisfactory. This has necessitated the use of invasive techniques to measure MO directly or to determine the oxygen demand during exercise using the cardiopulmonary exercise (CPX) test. We propose a new quantification method for MO using blood-oxygen-level-dependent (BOLD) myocardial T2* magnetic resonance imaging (M-T2* MRI), and investigate its correlation with CPX results. Methods Thirty patients with refractory HF who underwent cardiac MRI and CPX test for heart transplantation, and 24 healthy, age-matched volunteers as controls were enrolled. M-T2* imaging was performed using a 3-Tesla and multi-echo gradient-echo sequence. M-T2* was calculated by fitting the signal intensity data for the mid-left ventricular septum to a decay curve. M-T2* was measured under room-air (T2*-air) and after inhalation of oxygen for 10 min at a flow rate of 10 L/min (T2*-oxy). MO was defined as the difference between the two values (ΔT2*). Changes in M-T2* at the two conditions and ΔT2* between the two groups were compared. Correlation between ΔT2* and CPX results was analyzed using the Pearson coefficient. Results T2*-oxy was significantly greater than T2*-air in patients with HF (29.9 ± 7.3 ms vs. 26.7 ± 6.0 ms, p < 0.001), whereas no such difference was observed in controls (25.5 ± 4.0 ms vs. 25.4 ± 4.4 ms). ΔT2* was significantly greater for patients with HF than for controls (3.2 ± 4.5 ms vs. -0.1 ± 1.3 ms, p < 0.001). A significant correlation between ΔT2* and CPX results (peak VO2, r = − 0.46, p < 0.05; O2 pulse, r = − 0.54, p < 0.005) was observed. Conclusion ΔT2* is increased T2*-oxy is greater in patients with HF, and is correlated with oxygen metabolism during exercise as measured by the CPX test. Hence, ΔT2* can be used as a surrogate marker of MO instead of CPX test.

    DOI: 10.1016/j.mri.2017.02.005

  • Three-dimensional phase contrast magnetic resonance imaging validated to assess pulmonary artery flow in patients with chronic thromboembolic pulmonary hypertension 査読

    Masateru Kawakubo, Hiroshi Akamine, Yuzo Yamasaki, Atsushi Takemura, Kohtaro Abe, Kazuya Hosokawa, Junji Morishita, Michinobu Nagao

    Radiological physics and technology   10 ( 2 )   249 - 255   2017年6月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    In this study, three-dimensional phase contrast magnetic resonance imaging (3D-PC MRI), a novel technique, was validated to assess pulmonary artery (PA) flow in patients with chronic thromboembolic pulmonary hypertension (CTEPH). The MR data of PAs from 3D-PC and two-dimensional PC (2D-PC) from before and after treatment for 3 patients with CTEPH were retrospectively analyzed. Additionally, 3D- and 2D-PC MR scans of PA were performed in 5 healthy volunteers. Correlation of stroke volumes (SVs) obtained by 3D-PC and 2D-PC was analyzed using Pearson’s correlation coefficients. There was an excellent correlation in the SV of main PA, left PA and right PA between 3D-PC and 2D-PC (main PA: r = 0.91, p < 0.01, left PA: r = 0.72, p < 0.01 and right PA: r = 0.77, p < 0.01). In conclusion, 3D-PC MRI was able to accurately quantify the PA flow in patients with CTEPH.

    DOI: 10.1007/s12194-016-0383-0

  • Geometrical characteristics of aortic root and left ventricular dysfunction in aortic stenosis quantification of 256-slice coronary CT angiography 査読

    Michinobu Nagao, Yuzo Yamasaki, Takeshi Kamitani, Satoshi Kawanami, Masatoshi Kondo, Hiromichi Sonoda, Taisuke Fujioka, Hiroshi Honda

    Heart and Vessels   32 ( 5 )   558 - 565   2017年5月

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    記述言語:英語  

    The purpose of this study is to analyze the geometrical characteristics of aortic root and left ventricular (LV) function in aortic stenosis (AS) using 256-slice coronary-computed tomography angiography (CCTA). Retrospective ECG-gated 256-slice CCTA data from 32 patients with tricuspid AS scheduled for aortic valve replacement, and 11 controls were analyzed. Aortic root geometry was measured using multiplanar reconstruction CT images. CCTA data set was transformed into 100 phases/cycle using motion coherence image processing. Systolic shortening (SS, mm/ms) and diastolic relaxation (DR, mm/ms2) in the circumferential and longitudinal directions on time curves of myocardial length were calculated, and were used as estimates of geometric LV function. Comparison of parameters was analyzed by Mann–Whitney U test. Receiver-operating-characteristic (ROC) analysis was performed to determine the optimal cutoff of parameters for differentiating AS patients. Height of the right coronary cusp was significantly lower for AS patients than controls (11.4 ± 2.4 vs. 13.9 ± 2.0 mm/m2, p < 0.005). Vertical–longitudinal SS was significantly lower for AS patients than for controls (1.7 ± 0.8 vs. 2.7 ± 0.7 mm/ms/m2, p < 0.001). ROC analysis revealed optimal height of the right coronary cusp of 12.4 mm/m2 and vertical–longitudinal SS of 2.4 mm/ms/m2 for differentiating AS patients from controls, with C statistics of 0.82 and 0.85. In AS patients, ROC analysis revealed optimal vertical–longitudinal DR of 0.05 mm/ms2/m2 for predicting patients with stroke volume index <35 ml with C statistics of 0.93. Quantification of CCTA demonstrates that AS is characterized by small coronary cusps as aortic root remodeling and vertical–longitudinal LV dysfunction related to restrictive physiology.

    DOI: 10.1007/s00380-016-0902-2

  • Three-dimensional fractal analysis of 99m Tc-MAA SPECT images in chronic thromboembolic pulmonary hypertension for evaluation of response to balloon pulmonary angioplasty Association with pulmonary arterial pressure 査読 国際誌

    Yasuhiro Maruoka, Michinobu Nagao, Shingo Baba, Takuro Isoda, Yoshiyuki Kitamura, Yuzo Yamazaki, Koichiro Abe, Masayuki Sasaki, Kohtaro Abe, Hiroshi Honda

    Nuclear medicine communications   38 ( 6 )   480 - 486   2017年5月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    Objective Balloon pulmonary angioplasty (BPA) is used for inoperable chronic thromboembolic pulmonary hypertension (CTEPH), but its effect cannot be evaluated noninvasively. We devised a noninvasive quantitative index of response to BPA using three-dimensional fractal analysis (3D-FA) of technetium-99m-macroaggregated albumin (99m Tc-MAA) single-photon emission computed tomography (SPECT). Patients and methods Forty CTEPH patients who underwent pulmonary perfusion scintigraphy and mean pulmonary arterial pressure (mPAP) measurement by right heart catheterization before and after BPA were studied. The total uptake volume (TUV) in bilateral lungs was determined from maximum intensity projection 99m Tc-MAA SPECT images. Fractal dimension was assessed by 3D-FA. Parameters were compared before and after BPA, and between patients with post-BPA mPAP more than 30 mmHg and less than or equal to 30 mmHg. Receiver operating characteristic analysis was carried out. Results BPA significantly improved TUV (595±204-885±214 ml, P<0.001) and reduced the laterality of uptake (238±147-135±131 ml, P<0.001). Patients with poor therapeutic response (post-BPA mPAP≥30 mmHg, n=16) showed a significantly smaller TUV increase (P=0.044) and a significantly greater post-BPA fractal dimension (P<0.001) than the low-mPAP group. Fractal dimension correlated with mPAP values before and after BPA (P=0.013 and 0.001, respectively). A post-BPA fractal dimension threshold of 2.4 distinguished between BPA success and failure with 75&#37; sensitivity, 79&#37; specificity, 78&#37; accuracy, and area under the curve of 0.85. Conclusion 3D-FA using 99m Tc-MAA SPECT pulmonary perfusion scintigraphy enables a noninvasive evaluation of the response of CTEPH patients to BPA.

    DOI: 10.1097/MNM.0000000000000673

  • Detectability of BI-RADS category 3 or higher breast lesions and reading time on mammography Comparison between 5-MP and 8-MP LCD monitors 査読

    Hidetake Yabuuchi, Satoshi Kawanami, Takeshi Kamitani, Tomomi Matsumura, Yuzo Yamasaki, Junji Morishita, Hiroshi Honda

    Acta Radiologica   58 ( 4 )   403 - 407   2017年4月

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    記述言語:英語  

    Background Five-megapixel (MP) displays are recommended as soft copy devices for digital mammogram. An 8-MP liquid crystal display (LCD) (two 4-MP displays within one display) might offer the advantage of being able to view biplane mammography more easily than the dual planes of 5-MP LCDs. Purpose To compare detectability of Breast Imaging Reporting and Data System (BI-RADS) category 3 or higher lesions and reading time on mammography between 5- MP and 8-MP LCDs. Material and Methods The mammograms of 240 breasts of 120 patients including 60 breasts with BI-RADS category 3 or higher lesions and 180 breasts with normal or category 2 lesions were enrolled. All bilateral mammograms were displayed on bifacial 5-MP LCDs or an 8-MP LCD (two 4-MP displays within one display). Six radiologists assessed 240 breasts on each display. The observations were analyzed using receiver operating characteristic (ROC) analysis. A jack-knife method was used for statistical analysis. We employed a paired t-test to determine whether any significant differences existed in the reading time between two different displays. A P value < 0.05 was considered significant. Results The mean areas under the ROC curve obtained using 5-MP and 8-MP LCDs were 0.925 and 0.915, respectively, and there was no significant difference (P = 0.46). There was also no significant difference in the reading time between two types of displays (57.8 min. vs. 51.5 min, P = 0.39). Conclusion The detectability of BI-RADS category 3 or higher lesions and reading time using an 8-MP LCD were comparable to those using a 5-MP LCD.

    DOI: 10.1177/0284185116653279

  • バルーン肺動脈形成術により手術不可能な慢性血栓塞栓性肺高血圧症患者のRAリザーバーおよび導管機能が改善する(Balloon Pulmonary Angioplasty Improves RA Reservoir and Conduit Functions in Patients with Inoperable Chronic Thromboembolic Pulmonary Hypertension)

    山崎 誘三, 川波 哲, 阿部 弘太郎, 神谷 武志, 鷺山 幸二, 堀本 拡伸, 河窪 正照, 藪内 英剛, 本田 浩

    日本循環器学会学術集会抄録集   81回   PJ - 603   2017年3月

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    記述言語:英語  

  • 鑑別に苦慮した気管支放線菌症の1例

    山之内 寅彦, 神谷 武志, 米澤 政人, 山崎 誘三, 本田 浩, 川波 哲, 長尾 充展, 藪内 英剛, 諸富 洋介, 樋田 知之

    Japanese Journal of Radiology   35 ( Suppl. )   78 - 78   2017年2月

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    記述言語:日本語  

  • 256 slice CTを用いた心房中隔欠損症における非侵襲的肺体血流比評価

    山崎 誘三, 神谷 武志, 山之内 寅彦, 田中 祐子, 本田 浩, 長尾 充展, 川波 哲, 坂本 一郎, 山村 健一郎, 藪内 英剛

    Japanese Journal of Radiology   35 ( Suppl. )   94 - 94   2017年2月

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    記述言語:日本語  

  • 乳児先天性心疾患における心電図同期心臓CTの最適心位相の検討

    米澤 政人, 神谷 武志, 山崎 誘三, 山之内 寅彦, 本田 浩, 長尾 充展, 川波 哲, 藪内 英剛, 永田 弾, 山村 健一郎

    Japanese Journal of Radiology   35 ( Suppl. )   79 - 79   2017年2月

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    記述言語:日本語  

  • Balloon pulmonary angioplasty improves interventricular dyssynchrony in patients with inoperable chronic thromboembolic pulmonary hypertension a cardiac MR imaging study 査読 国際誌

    Yuzo Yamasaki, Michinobu Nagao, Kohtaro Abe, Kazuya Hosokawa, Satoshi Kawanami, Takeshi Kamitani, Torahiko Yamanouchi, Koshin Horimoto, Hidetake Yabuuchi, Hiroshi Honda

    International Journal of Cardiovascular Imaging   33 ( 2 )   229 - 239   2017年2月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    To use cardiac magnetic resonance imaging (MRI) to investigate the effect of balloon pulmonary angioplasty (BPA) on interventricular dyssynchrony and its associations with ventricular interaction, which impairs LV function in patients with inoperable chronic thromboembolic pulmonary hypertension (CTEPH). This prospective observational study was approved by our institutional review board. Cardiac MRI and right heart catheterization were conducted before BPA sessions and at the follow up after BPA in 20 patients with CTEPH. We measured right ventricular (RV) and left ventricular (LV) end-diastolic volume (EDV), end-systolic volume (ESV), stroke volume (SV), and ejection fraction (EF) using MRI. For the LV and RV free walls, the time to peak (Tpeak) of circumferential strain was calculated as a parameter for interventricular dyssynchrony. Following BPA, the RV-EDV and -ESV were significantly decreased, and the RVEF was significantly increased. Conversely, BPA led to significantly increased LV EDV and SV without changing LVESV. The left-to-right free wall delay (L–R delay) in Tpeak strain decreased from 105 ± 44 ms to 47 ± 67 ms (p < 0.001). Increased LV EDV (r = 0.65, p < 0.01), SV (r = 0.74, p < 0.001) and 6-minute walk distance (6MWD) (r = 0.54, p < 0.05) were correlated to the reduction in L–R delay. In patients with inoperable CPEPH, BPA improved interventricular dyssynchrony, which was strongly associated with increased SV and 6MWD. The assessment of interventricular dyssynchrony using cardiac MRI has an important role in evaluating ventricular interaction, which reduces LVSV and exercise tolerance.

    DOI: 10.1007/s10554-016-0985-y

  • 浸潤性微小乳頭癌に粘液癌成分を伴った乳癌の1例

    田中 祐子, 神谷 武志, 山崎 誘三, 山之内 寅彦, 本田 浩, 川波 哲, 長尾 充展, 鷺山 幸二, 藪内 英剛, 久保 真, 山元 英崇, 大石 善丈

    Japanese Journal of Radiology   35 ( Suppl. )   95 - 95   2017年2月

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    記述言語:日本語  

  • One-stop shop assessment for atrial septal defect closure using 256-slice coronary CT angiography 査読

    Yuzo Yamasaki, Michinobu Nagao, Satoshi Kawanami, Takeshi Kamitani, Koji Sagiyama, Torahiko Yamanouchi, Ichiro Sakamoto, Kenichiro Yamamura, Hidetake Yabuuchi, Hiroshi Honda

    European Radiology   27 ( 2 )   697 - 704   2017年2月

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    記述言語:英語  

    Objectives: To investigate the feasibility and accuracy of measurement of the pulmonary to systemic blood flow ratio (Qp/Qs) and defect and rim sizes in secundum atrial septal defects (ASDs) using 256-slice CT, compared to the reference transoesophageal echocardiography (TEE) and right heart catheterization (RHC) measurements. Methods: Twenty-three consecutive adult patients with secundum ASDs who underwent retrospective ECG-gated coronary CT angiography (CCTA), TEE and RHC were enrolled in this study. Right ventricular (RV) and left ventricular (LV) stroke volumes (SV) were calculated by biventricular volumetry of CCTA. Qp/Qs-CT was defined as RVSV/LVSV. The sizes of the defect and rim were measured by multi-planar reconstruction CT images. Correlations between Qp/Qs-CT and Qp/Qs–RHC and between the defect diameter obtained by CT and TEE were analyzed by Pearson’s coefficient analysis. Rim sizes by CT and TEE were compared by paired t-test. Results: Qp/Qs-CT was significantly correlated with Qp/Qs-RHC (r = 0.83, p < 0.0001), and the defect diameter by CT was significantly correlated with that by TEE (r = 0.95, p < 0.0001). There was no significant difference between CT and TEE in measurements of rim size. Conclusions: 256-slice CCTA allows measuring Qp/Qs and size of defects and rims in patients with secundum ASDs, accomplishing pretreatment evaluation non-invasively and comprehensively. Key Points: • Quantification of left-to-right shunting can be performed reliably and accurately by CT. • The sizes of defects and rims can be measured accurately using 256-slice CT. • 256-slice CT permits pretreatment evaluation of ASD non-invasively and comprehensively.

    DOI: 10.1007/s00330-016-4407-2

  • Energy efficiency and pulmonary artery flow after balloon pulmonary angioplasty for inoperable, chronic thromboembolic pulmonary hypertension Analysis by phase-contrast MRI 査読 国際誌

    Michinobu Nagao, Yuzo Yamasaki, Kohtaro Abe, Kazuya Hosokawa, Satoshi Kawanami, Takeshi Kamitani, Torahiko Yamanouchi, Hidetake Yabuuchi, Kenji Fukushima, Hiroshi Honda

    European Journal of Radiology   87   99 - 104   2017年2月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    Purpose The aims of this study were to propose a new quantitative method for pulmonary artery (PA) flow energetics using phase-contrast magnetic resonance imaging (PC-MRI), and to investigate how balloon pulmonary angioplasty (BPA) impacts energetics in chronic thromboembolic pulmonary hypertension (CTEPH). Materials and methods PC-MRI at 3-Teslar and with a flow sensitive gradient echo was used to examine energetics prior to and following BPA for 24 CTEPH patients. Stroke volume (m; ml) and mean velocity (V; mm/s) for the main pulmonary artery (PA), right PA, and left PA were calculated from a time-flow curve derived from PC-MRI. Based on the Bernoulli principle, PA energy was identified as 1/2 mV2 (μj/kg), and energy loss was defined as the following equation “energy loss = main PA energy − (rt. PA energy + lt. PA energy)”. Results Right PA energy was significantly greater post-BPA than pre-BPA (61 ± 55 vs. 32 ± 40 μj/kg). There was no difference in main PA and left PA energies. Energy loss was significantly decreased post-BPA (18 ± 97 μj/kg) than pre-BPA (79 ± 125 μj/kg). An optimal cutoff of left PA energy of 45 μj/kg pre-BPA can be used to predict patients with mPAP ≥ 30 mmHg after BPA, with an area under the curve of 0.91, 78&#37; sensitivity, and 92&#37; specificity. Conclusion Analysis of PA energetics using phase-contrast MRI demonstrates that BPA improves energy loss in CTEPH. In addition, BPA responses can be predicted by PA energy status pre-treatment.

    DOI: 10.1016/j.ejrad.2016.12.015

  • Silent Progression of Coronary Artery Thrombosis in a Pregnant Woman With Anomalous Origin of Left Coronary Artery From the Pulmonary Artery 査読

    Yamamura Kenichiro, Sakamoto Ichiro, Yamasaki Yuzo, Fujiwara Arisa, Nagao Michinobu, Takada Hidetoshi

    Circulation Journal   81 ( 8 )   1236 - 1237   2017年1月

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    記述言語:英語  

    Silent progression of coronary artery thrombosis in a pregnant woman with anomalous origin of left coronary artery from the pulmonary artery

    DOI: 10.1253/circj.CJ-16-1248

  • こだわりのCT画像処理 各領域の画像処理エキスパートによる、"こだわり"と"こだわらない"CT画像処理のポイント・ノウハウを伝授 PhyZiodynamicsを用いた新たな冠動脈血流イメージング

    小島 宰, 下宮 大和, 長尾 充展, 白坂 崇, 山崎 誘三, 中村 泰彦

    映像情報Medical   48 ( 13 )   86 - 91   2016年12月

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    記述言語:日本語  

  • Lymphomatoid granulomatosis 査読

    Torahiko Yamanouchi, Satoshi Kawanami, Takeshi Kamitani, Koji Sagiyama, Yuzo Yamasaki, Yuko Tanaka, Michinobu Nagao, Hidetake Yabuuchi, Naoki Hamada, Tatsuro Okamoto, Hidetaka Yamamoto, Hiroshi Honda

    Journal of Thoracic Imaging   31 ( 6 )   W80 - W82   2016年11月

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    記述言語:英語  

    DOI: 10.1097/RTI.0000000000000243

  • Lymphomatoid Granulomatosis: Two Different Phenotypes of Computed Tomography Findings. 査読 国際誌

    Torahiko Yamanouchi, Satoshi Kawanami, Takeshi Kamitani, Koji Sagiyama, Yuzo Yamasaki, Yuko Tanaka, Michinobu Nagao, Hidetake Yabuuchi, Naoki Hamada, Tatsuro Okamoto, Hidetaka Yamamoto, Hiroshi Honda

    Journal of thoracic imaging   31 ( 6 )   W80-W82   2016年11月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

  • Prediction of post-operative pulmonary function after lobectomy for primary lung cancer A comparison among counting method, effective lobar volume, and lobar collapsibility using inspiratory/expiratory CT 査読

    Hidetake Yabuuchi, Satoshi Kawanami, Takeshi Kamitani, Masato Yonezawa, Yuzo Yamasaki, Torahiko Yamanouchi, Michinobu Nagao, Tatsuro Okamoto, Hiroshi Honda

    European Journal of Radiology   85 ( 11 )   1956 - 1962   2016年11月

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    記述言語:英語  

    Purpose To compare the predictabilities of postoperative pulmonary function after lobectomy for primary lung cancer among counting method, effective lobar volume, and lobar collapsibility. Methods Forty-nine patients who underwent lobectomy for primary lung cancer were enrolled. All patients underwent inspiratory/expiratory CT and pulmonary function tests 2 weeks before surgery and postoperative pulmonary function tests 6–7 months after surgery. Pulmonary function losses (ΔFEV1.0 and ΔVC) were calculated from the pulmonary function tests. Predictive postoperative pulmonary function losses (ppoΔFEV1.0 and ppoΔVC) were calculated using counting method, effective volume, and lobar collapsibility. Correlations and agreements between ΔFEV1.0 and ppoFEV1.0 and those between ΔVC and ppoΔVC were tested among three methods using Spearman's correlation coefficient and Bland-Altman plots. Results ΔFEV1.0 and ppoΔFEV1.0insp-exp were strongly correlated (r = 0.72), whereas ΔFEV1.0 and ppoΔFEV1.0count and ΔFEV1.0 and Pred. ΔFEV1.0eff.vol. were moderately correlated (r = 0.50, 0.56). ΔVC and ppoΔVCeff.vol. (r = 0.71) were strongly correlated, whereas ΔVC and ppoΔVCcount, and ΔVC and ppoΔVC insp-exp were moderately correlated (r = 0.55, 0.42). Conclusions Volumetry from inspiratory/expiratory CT data could be useful to predict postoperative pulmonary function after lobectomy for primary lung cancer.

    DOI: 10.1016/j.ejrad.2016.08.017

  • Clinical impact of left ventricular eccentricity index using cardiac MRI in assessment of right ventricular hemodynamics and myocardial fibrosis in congenital heart disease 査読

    Yuzo Yamasaki, Michinobu Nagao, Takeshi Kamitani, Torahiko Yamanouchi, Satoshi Kawanami, Kenichiro Yamamura, Ichiro Sakamoto, Hidetake Yabuuchi, Hiroshi Honda

    European Radiology   26 ( 10 )   3617 - 3625   2016年10月

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    記述言語:英語  

    Objectives: To investigate the utility of eccentricity index (EI) using cardiac cine MRI for the assessment of right ventricular (RV) hemodynamics in congenital heart disease (CHD). Methods: Fifty-five patients with CHD (32 women; mean age, 40.7 ± 20.9 years) underwent both cardiac MRI and right heart catheterization. EI was defined as the ratio of the distance between the anterior-posterior wall and the septal-lateral wall measured in the short-axis of mid-ventricular cine MRI. Correlations between EIs and RV hemodynamic parameters were analyzed. EIs were compared between patients with and without late gadolinium enhancement (LGE). Results: A strong correlation between mean pulmonary artery pressure (PAP) and systolic EI (r = 0.81, p < 0.0001) and a moderate negative correlation between diastolic EI and RV ejection fraction (EF) (r = -0.62, p < 0.0001) were observed. Receiver operating characteristic analysis revealed optimal EI thresholds for detecting patients with mean PAP ≥40 mmHg with C-statistics of 0.90 and patients with RVEF <40 &#37; with C-statistics of 0.78. Systolic EIs were significantly greater for patients with LGE (1.45 ± 0.05) than for those without LGE (1.15 ± 0.07; p < 0.001). Conclusions:: EI offers a simple, comprehensive index that can predict pulmonary hypertension and RV dysfunction in CHD. Key points:: • EI offers a simple and comprehensive index of RV hemodynamics. • EI could predict pulmonary hypertension and RV dysfunction. • Left ventricular deformation expressed as high EI is related to myocardial fibrosis.

    DOI: 10.1007/s00330-015-4199-9

  • Efficacy of periodically rotated overlapping parallel lines with enhanced reconstruction (PROPELLER) for shoulder magnetic resonance (MR) imaging 査読

    Kazuya Nagatomo, Hidetake Yabuuchi, Yuzo Yamasaki, Hiroshi Narita, Seiji Kumazawa, Tsukasa Kojima, Noriyuki Sakai, Masahumi Masaki, Hiroshi Kimura

    European Journal of Radiology   85 ( 10 )   1735 - 1743   2016年10月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    Objectives To elucidate the utility of PROPELLER for motion artefact reduction on shoulder MRI and to examine the influence of streak artefacts on diagnosis of clinical images. Methods 15 healthy volunteers and 48 patients underwent shoulder MRI with/without PROPELLER (coronal oblique proton density-fast spin echo [PD-FSE], sagittal oblique T2-FSE). In a volunteer study, all sequences were performed in both static and exercise-loaded conditions. Two radiologists graded artefacts and delineation of various anatomical structures in the volunteer study and motion and streak artefacts in the clinical study. Mean scores were compared between sequences with/without PROPELLER. In the clinical study, mean scores of motion artefacts were compared with mean scores of streak artefacts. Wilcoxon signed-rank test was used for all comparisons. Results In both studies, PROPELLER significantly reduced motion artefacts (P < 0.05). In the volunteer study, it significantly improved delineations in sagittal oblique images in the exercise-loaded condition (P < 0.05). In the clinical study, streak artefacts appeared dominantly on images with PROPELLER (P < 0.05), but influenced diagnosis to a lesser extent than motion artefacts. Conclusion PROPELLER can reduce motion artefacts in shoulder MRI. While it does cause streak artefacts, it affects diagnosis to a lesser extent.

    DOI: 10.1016/j.ejrad.2016.07.008

  • 感染を合併した末梢気道疾患のCT所見(CT Findings of Small Airway Diseases Associated with Infection)

    川波 哲, 神谷 武志, 鷺山 幸二, 山崎 誘三, 亀井 俊祐, 藪内 英剛, 本田 浩

    日本医学放射線学会秋季臨床大会抄録集   52回   S433 - S434   2016年8月

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    記述言語:英語  

  • 前縦隔粘液性腺癌の1例

    亀井 俊佑, 川波 哲, 神谷 武志, 鷺山 幸二, 山崎 誘三, 薮内 英剛, 岡本 龍郎, 山元 英崇, 樋田 知之, 本田 浩

    日本医学放射線学会秋季臨床大会抄録集   52回   S553 - S553   2016年8月

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    記述言語:日本語  

  • Quantification of coronary flow using dynamic angiography with 320-detector row CT and motion coherence image processing Detection of ischemia for intermediate coronary stenosis 査読 国際誌

    Michinobu Nagao, Yuzo Yamasaki, Takeshi Kamitani, Satoshi Kawanami, Koji Sagiyama, Torahiko Yamanouchi, Yamato Shimomiya, Tetsuya Matoba, Yasushi Mukai, Keita Odashiro, Shingo Baba, Yasuhiro Maruoka, Yoshiyuki Kitamura, Akihiro Nishie, Hiroshi Honda

    European Journal of Radiology   85 ( 5 )   996 - 1003   2016年5月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    Objectives Anatomical coronary stenosis is not always indicative of functional stenosis, particularly for intermediate coronary lesions. The purpose of this study is to propose a new method for quantifying coronary flow using dynamic CT angiography for the whole heart (heart-DCT) and investigate its ability for detecting ischemia from intermediate coronary stenosis. Methods Participants comprised 36 patients with coronary artery disease who underwent heart-DCT using 320-detector CT with tube voltage of 80 kV and myocardial perfusion scintigraphy (MPS). Heart-DCT was continuously performed at mid-diastole throughout 15-25 cardiac cycles with prospective ECG-gating after bolus injection of contrast media (12-24 ml). Dynamic datasets were computed into 90-100 data sets by motion coherence image processing (MCIP). Next, time-density curves (TDCs) for coronary arteries with a diameter >3 mm were automatically calculated for all phases using MCIP. On the basis of the maximum slope method, coronary flow index (CFI) was defined as the ratio of the maximum upslope of coronary artery attenuation to the upslope of ascending aorta attenuation on the TDC, and was used to quantify coronary flow. CFIs for the proximal and distal sites of coronary arteries with mild-to-moderate stenosis were calculated. Coronary territories were categorized as non-ischemic or ischemic by MPS. Receiver-operating-characteristic (ROC) analysis was performed to determine the optimal cutoff for CFI to detect ischemia. Results Distal CFI was significantly lower for ischemia (0.26 ± 0.08) than for non-ischemia (0.50 ± 0.17, p < 0.0001). No significant difference in proximal CFI was seen between ischemia (0.55 ± 0.23) and non-ischemia (0.62 ± 0.24). ROC analysis revealed 0.39 as the optimal cutoff for distal CFI to detect ischemia, with C-statistics of 0.91, 100&#37; sensitivity, and 75&#37; specificity. Conclusions This novel imaging technique allows coronary flow quantification using heart-DCT. Distal CFI can detect myocardial ischemia derived from intermediate coronary stenosis.

    DOI: 10.1016/j.ejrad.2016.02.027

  • ファロー四徴症術後の右室機能解析における256-slice MSCTの有用性 MRIとの比較

    山崎 誘三, 松尾 芳雄, 神谷 武志, 米澤 政人, 本田 浩, 長尾 充展, 川波 哲, 山村 健一郎, 坂本 一郎, 藪内 英剛

    Japanese Journal of Radiology   34 ( Suppl. )   86 - 86   2016年2月

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    記述言語:日本語  

  • シネMRIの左心室Eccentricity Indexによる右心不全評価

    山崎 誘三, 神谷 武志, 米澤 政人, 藤田 陽子, 本田 浩, 長尾 充展, 川波 哲, 阿部 弘太郎, 坂本 一郎, 藪内 英剛

    Japanese Journal of Radiology   34 ( Suppl. )   98 - 98   2016年2月

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    記述言語:日本語  

  • Evaluation of ventricular dysfunction using semi-automatic longitudinal strain analysis of four-chamber cine MR imaging 査読 国際誌

    Masateru Kawakubo, Michinobu Nagao, Seiji Kumazawa, Yuzo Yamasaki, Akiko S. Chishaki, Yasuhiko Nakamura, Hiroshi Honda, Junji Morishita

    International Journal of Cardiovascular Imaging   32 ( 2 )   283 - 289   2016年2月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    The aim of this study was to evaluate ventricular dysfunction using the longitudinal strain analysis in 4-chamber (4CH) cine MR imaging, and to investigate the agreement between the semi-automatic and manual measurements in the analysis. Fifty-two consecutive patients with ischemic, or non-ischemic cardiomyopathy and repaired tetralogy of Fallot who underwent cardiac MR examination incorporating cine MR imaging were retrospectively enrolled. The LV and RV longitudinal strain values were obtained by semi-automatically and manually. Receiver operating characteristic (ROC) analysis was performed to determine the optimal cutoff of the minimum longitudinal strain value for the detection of patients with cardiac dysfunction. The correlations between manual and semi-automatic measurements for LV and RV walls were analyzed by Pearson coefficient analysis. ROC analysis demonstrated the optimal cut-off of the minimum longitudinal strain values (εL_min) for diagnoses the LV and RV dysfunction at a high accuracy (LV εL_min = −7.8 &#37;: area under the curve, 0.89; sensitivity, 83 &#37;; specificity, 91 &#37;, RV εL_min = −15.7 &#37;: area under the curve, 0.82; sensitivity, 92 &#37;; specificity, 68 &#37;). Excellent correlations between manual and semi-automatic measurements for LV and RV free wall were observed (LV, r = 0.97, p < 0.01; RV, r = 0.79, p < 0.01). Our semi-automatic longitudinal strain analysis in 4CH cine MR imaging can evaluate LV and RV dysfunction with simply and easy measurements. The strain analysis could have extensive application in cardiac imaging for various clinical cases.

    DOI: 10.1007/s10554-015-0771-2

  • Feeding Arteries of Primary Tongue Cancers on Intra-arterial Infusion Chemotherapy 査読 国際誌

    Takeshi Kamitani, Satoshi Kawanami, Yoshiki Asayama, Yoshio Matsuo, Masato Yonezawa, Yuzo Yamasaki, Michinobu Nagao, Torahiko Yamanouchi, Hidetake Yabuuchi, Katsumasa Nakamura, Torahiko Nakashima, Hiroshi Honda

    CardioVascular and Interventional Radiology   39 ( 2 )   227 - 232   2016年2月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    Purpose: To evaluate the frequency and the predictive factor of each feeding artery on intra-arterial infusion chemotherapy (IAIC) in primary tongue cancer. Materials and Methods: We retrospectively evaluated 20 patients who received IAIC for primary tongue cancer. The main and accompanying feeding arteries were identified on super-selective angiography of the branches of the external carotid artery. Tumor diameter, and extension to the contralateral side, tongue extrinsic muscles (TEMs), and lateral mesopharyngeal wall were determined based on magnetic resonance imaging or computed tomography findings. Results: The main feeding artery was the ipsilateral lingual artery (LA) in 15 of the 20 examined tumors and the contralateral LA in the other 5. Ten cancers had only one feeding artery, and multiple feeding arteries were detected in the remaining 10. Tumors >4 cm (n = 9), those with extension to the contralateral side (n = 13), and those with extension to TEMs (n = 15) were supplied by significantly larger numbers of feeding arteries compared to tumors without these features (P = 0.01, 0.049, and 0.02, respectively). The frequency of feeding from the contralateral LA was 64 &#37; (9/14) and 17 &#37; (1/6) in tumors with and without extension to the contralateral side, respectively. Feeding from a facial artery (FA) was not detected in tumors ≤4 cm, while 5 of the 9 (56 &#37;) tumors >4 cm were supplied by a FA (P = 0.01). Conclusion: A careful search for feeding arteries is required, especially in large tumors with extension to the contralateral side or to TEMs.

    DOI: 10.1007/s00270-015-1159-3

  • Efficacy of the radial acquisition regime (RADAR) for acquiring head and neck MR images 査読

    Tsukasa Kojima, Hidetake Yabuuchi, Hiroshi Narita, Seiji Kumazawa, Yuzo Yamasaki, Yuki Yano, Noriyuki Sakai, Yoichi Kurihara, Kiyoshi Hisada, Masafumi Masaki, Hiroshi Kimura

    British Journal of Radiology   89 ( 1067 )   20160007 - 20160007   2016年1月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    Objective: To investigate the efficacy of the radial acquisition regime (RADAR) for acquiring head and neck MR images. Methods: 15 healthy volunteers underwent imaging with 4 sequences [fast spin echo T2 weighted imaging (FSET2WI), RADAR T2 weighted imaging (RADAR-T2WI), single-shot echo planar imaging diffusion-weighted imaging (SS-EPI-DWI) and RADAR diffusion-weighted imaging (RADAR-DWI)]. Both standard images and images during periodic mouth motion were acquired. Two radiologists scored the overall image artefacts and detectability of several anatomical structures without knowledge of sequence type. For each sequence, image distortion was quantitatively compared by the anteroposterior to right-left ratio of several anatomical structures. The mean scores of artefacts and distortion of several anatomical structures were compared using the multiple comparison test. The detectabilities were compared using the Wilcoxon signed-rank test. Results: Regardless of mouth motion, RADAR-T2WI was significantly superior to FSE-T2WI in artefacts and oralarea detectability (p,0.01), and RADAR-DWI was significantly superior to SS-EPI-DWI in terms of artefacts (p,0.01). In terms of image distortion, RADAR-DWI was significantly superior to SS-EPI-DWI (p,0.01). Conclusion: RADAR-T2WI could replace FSE-T2WI as a conventional T2WI protocol for the head and neck. For the RADAR-DWI sequence, validation studies are needed.

    DOI: 10.1259/bjr.20160007

  • Anterior mediastinal solid tumours in adults Characterisation using dynamic contrast-enhanced MRI, diffusion-weighted MRI, and FDG-PET/CT 査読

    H. Yabuuchi, Y. Matsuo, K. Abe, S. Baba, S. Sunami, T. Kamitani, M. Yonezawa, Y. Yamasaki, S. Kawanami, M. Nagao, T. Okamoto, K. Nakamura, H. Yamamoto, M. Sasaki, H. Honda

    Clinical Radiology   70 ( 11 )   1289 - 1298   2015年11月

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    記述言語:英語  

    Aim To find significant parameters to characterise anterior mediastinal solid tumours in adults using dynamic contrast-enhanced magnetic resonance imaging (DCE-MRI), diffusion-weighted MRI (DWI), and combined 2-[18F]-fluoro-2-deoxy-d-glucose positron-emission tomography/computed tomography (FDG-PET/CT). Materials and methods Forty-eight histologically confirmed anterior mediastinal solid tumours in 48 patients (24 men, 24 women; age range 21-83 years, mean 50.7 years) were examined. The parameters analysed were maximal diameter, presence of capsule/septa on T2-weighted images, time-signal intensity curves (TICs), apparent diffusion coefficient (ADC), and maximum standardised uptake value (SUVmax). Also examined was whether any differences between histological types could be seen in these parameters. In a validation study, 42 anterior mediastinal solid tumours in 42 patients were examined consecutively. Results The washout pattern on TIC was seen only in thymic epithelial tumours (20/32). SUVmax of lymphoma (mean, 17.9), malignant germ cell tumours (14.2), and thymic carcinomas (15.6) were significantly higher than that of thymomas (6.1). The mean maximal diameter of thymic epithelial tumours was significantly smaller than that of lymphomas (p<0.01) and malignant germ cell tumours (p<0.05). The validation study also yielded high accuracy (38/42, 91&#37;) in differentiation among the anterior mediastinal solid tumours. Conclusion The SUVmax, TIC pattern on DCE-MRI, and maximal diameter might be useful to differentiate anterior mediastinal solid tumours in adults.

    DOI: 10.1016/j.crad.2015.07.004

  • Right Ventricular Pressure-Volume Relationship to Evaluate Right Ventricular-Pulmonary Arterial Coupling and Energetics

    Takafumi Sakamoto, Kohtaro Abe, Kazuya Hosokawa, Keiji Oi, Yasushi Mukai, Yuzo Yamazaki, Michinobu Nagao, Tomomi Ide, Kenji Sunagawa

    JOURNAL OF CARDIAC FAILURE   21 ( 10 )   S152 - S152   2015年10月

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    記述言語:英語  

    DOI: 10.1016/j.cardfail.2015.08.041

  • Mediastinal paraganglioma 査読

    Yoko Takashima, Takeshi Kamitani, Satoshi Kawanami, Michinobu Nagao, Masato Yonezawa, Yuzo Yamasaki, Shingo Baba, Hidetake Yabuuchi, Tomoyuki Hida, Kenichi Kohashi, Katsuya Nakamura, Hiromichi Sonoda, Yoshinao Oda, Hiroshi Honda

    Japanese Journal of Radiology   33 ( 7 )   433 - 436   2015年7月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    We present a case of mediastinal paraganglioma with radiologic–pathologic correlation. A 48-year-old woman was found incidentally to have a middle mediastinal mass on CT. The mass showed iso-signal intensity compared to that of muscle on T1-weighted images and high signal intensity on T2-weighted images. The lesion showed intermediate intensity on diffusion-weighted imaging, and its apparent diffusion coefficient was 1.72 × 10−3 mm2/s. A contrast-enhanced dynamic study revealed a rapid peak and washout enhancement pattern. 18F-FDG-PET revealed abnormal uptake in the mediastinal tumor with a maximal standardized uptake value of 7.88. 123I-meta-iodobenzylguanidine scintigraphy also showed abnormal uptake in the tumor. These findings corresponded to the hypervascularity, rich stroma, low nuclear/cytoplasmic ratio, and nest-forming proliferation of tumor cells with positive neuroendocrine markers.

    DOI: 10.1007/s11604-015-0436-z

  • Interventricular Dyssynchrony Using Tagging Magnetic Resonance Imaging Predicts Right Ventricular Dysfunction in Adult Congenital Heart Disease 査読

    Michinobu Nagao, Yuzo Yamasaki, Masato Yonezawa, Yoshio Matsuo, Takeshi Kamitani, Kenichiro Yamamura, Ichiro Sakamoto, Kohtaro Abe, Satoshi Kawanami, Hiroshi Honda

    Congenital Heart Disease   10 ( 3 )   271 - 280   2015年5月

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    記述言語:英語  

    Purpose: Right ventricular (RV) failure and ventricular dyssynchrony are strong determinants of prognosis in patients with adult congenital heart disease (ACHD). The aim of this study was to investigate the relationship between interventricular dyssynchrony (IVD) using cine-tagged magnetic resonance imaging (MRI) and RV dysfunction in ACHD patients. Materials and Methods: Sixty-seven patients with ACHD (38 with repaired tetralogy of Fallot; 22 with atrial septal defect; seven with ventricular septal defect) underwent tagging MRI. Time curves of myocardial circumferential strains for RV and left ventricular (LV) free walls were delivered from short-axis cine-tagging images. Contraction delay between RV and LV free walls was computed by cross-correlation analysis of the two strain time curves and was defined as the IVD time (msec). Results: IVD was significantly greater for patients with RV ejection fraction (RVEF) <40&#37; (116 ± 58 msec) than for patients with RVEF ≥40&#37; (65 ± 54 msec) and was significantly greater for patients with RV systolic pressure ≥40 mmHg (112 ± 59 msec) than for patients with RV systolic pressure <40 mmHg (49 ± 28 msec). Receiver operating characteristic analysis revealed optimal IVD thresholds for detecting patients with RVEF <40&#37; with C-statistics of 0.76 and patients with RV systolic pressure ≥40 mmHg with C-statistics of 0.81. Conclusion: Quantification of IVD was possible using RV and LV strains derived from tagging MRI. IVD, represented as the time difference between LV and RV contractions, correlates with RV dysfunction. IVD may thus offer an indicator for RV failure in ACHD.

    DOI: 10.1111/chd.12217

  • 【Cardiac imaging 2015】シネタギングMRIの臨床応用

    長尾 充展, 米澤 政人, 山崎 誘三, 神谷 武志, 山之内 寅彦, 川波 哲, 本田 浩

    臨床画像   31 ( 4月増刊 )   148 - 158   2015年4月

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    記述言語:日本語  

  • 放射線照射に伴う急性期両心室機能変化の検討

    米澤 政人, 松尾 芳雄, 神谷 武志, 陣内 三佳子, 山崎 誘三, 吉浦 敬, 中村 和正, 本田 浩, 長尾 充展, 川波 哲

    Japanese Journal of Radiology   33 ( Suppl. )   113 - 113   2015年2月

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    記述言語:日本語  

  • Prediction of adverse cardiac events in dilated cardiomyopathy using cardiac T2* MRI and MIBG scintigraphy 査読

    Michinobu Nagao, Shingo Baba, Masato Yonezawa, Yuzo Yamasaki, Takeshi Kamitani, Takuro Isoda, Satoshi Kawanami, Yasuhiro Maruoka, Yoshiyuki Kitamura, Kohtaro Abe, Taiki Higo, Kenji Sunagawa, Hiroshi Honda

    International Journal of Cardiovascular Imaging   31 ( 2 )   399 - 407   2015年2月

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    記述言語:英語  

    Iron deficiency and cardiac sympathetic impairment play a role in the worsening of heart failure, and these two conditions may be linked. The present study aimed to clarify the relationship between myocardial iron deficiency, cardiac sympathetic activity, and major adverse cardiac events (MACE) in patients with dilated cardiomyopathy (DCM). Cardiac T2* MRI for iron deficiency and 123I-Metaiodobenzylguanidine (MIBG) imaging for cardiac sympathetic activity were performed in 46 patients with DCM. Myocardial T2* value (M-T2*) was calculated by fitting signal intensity data for mid-left ventricular septum to a decay curve using 3-Tesla scanner. 123I-MIBG washout rate (MIBG-WR) was calculated using a polar-map technique with tomographic data. We analyze the ability of M-T2* and MIBG-WR to predict MACE. MIBG-WR and M-T2* were significantly greater in DCM patients with MACE than in patients without MACE. Receiver-operating-characteristics curve analysis showed that the optimal MIBG-WR and M-T2* thresholds of 35 &#37; and 28.1 ms, and the two combination predict MACE with C-statics of 0.69, 0.73, and 0.82, respectively. Patients with MIBG-WR <35 &#37; and M-T2* <28.1 ms had significantly lower event-free rates than those with MIBG-WR ≥35 &#37; or M-T2* ≥28.1 ms (log-rank value = 4.35, p < 0.05). Cox hazard regression analysis showed that χ2 and the hazard ratio were 3.99 and 2.15 for development of MACE in patients with MIBG-WR ≥35 &#37; or M-T2* ≥28.1 ms (p < 0.05). Iron deficiency, expressed by a high M-T2*, and MIBG-WR were both independent predictors of MACE in patients with DCM. The two combination was a more powerful predictor of MACE than either parameter alone.

    DOI: 10.1007/s10554-014-0562-1

  • 成人先天性心疾患においてTagging MRIによる心室同期不全から予測される右室機能不全(Interventricular Dyssynchrony Using Tagging MRI Predicts Right Ventricular Dysfunction in Adult Congenital Heart Disease)

    長尾 充展, 米澤 政人, 山崎 誘三, 神谷 武志, 山村 健一郎, 坂本 一郎, 川波 哲, 本田 浩

    日本成人先天性心疾患学会雑誌   4 ( 1 )   111 - 111   2015年1月

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    記述言語:英語  

  • 【胸部の最新画像情報2015】転移性肺腫瘍の非典型的CT所見

    神谷 武志, 松尾 芳雄, 久保 雄一郎, 川波 哲, 長尾 充展, 米澤 政人, 山崎 誘三, 藤田 陽子, 藪内 英剛, 本田 浩

    臨床放射線   60 ( 1 )   81 - 88   2015年1月

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    記述言語:日本語  

  • Atypical CT findings of metastatic lung tumor 査読

    T. Kamitani, M. Yonezawa, Y. Yamasaki, Y. Fujita, H. Honda, Y. Matsuo, Y. Kubo, S. Kawanami, M. Nagao, H. Yabuuchi

    Japanese Journal of Clinical Radiology   60 ( 1 )   81 - 88   2015年1月

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    記述言語:英語  

    Diagnosis of metastatic lung tumors is relatively easy due to the clinical and imaging features in most cases. However, atypical imaging findings of metastatic lung tumors are observed occasionally, which make diagnosis difficult. For a correct diagnosis, it is necessary to determine the nature of unusual imaging features and to understand the underlying histopathological change. Here we review the atypical imaging features with the pathologic correlation of metastatic lung tumors.

  • 心臓MRIとCTによる心筋ストレイン—Myocardial strain analysis by cardiac MRI and CT : Clinical Implication—特集 心臓CT/MRI update 査読

    長尾 充展, 米澤 政人, 山崎 誘三

    臨床放射線 / 金原出版株式会社 [編]   60 ( 2 )   230 - 237   2015年1月

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    記述言語:英語  

    Myocardial strain analysis by cardiac MRI and CT Clinical implication
    Myocardial strain analysis with cine-tagged MRI provides direct information of the timing of onset and peak of myocardial contraction, and allows evaluation of regional function and mechanical dyssynchrony. Cardiac MRI without restrictions of acoustic windows and narrow field of view has an advantage of measuremerits of right ventricular strain and the geometric difference in left ventricular contraction. We have reported that a contraction delay between right and left ventricle correlated with right ventricular dysfunction in adult congenital heart disease, and that spatial dyssynchrony was associated with reduction in cardiac sympathetic activity in non-ischemic heart failure. In addition, we propose to quantify CT myocardial strain using a new software named "motion coherence analysis". Motion coherence analysis processes the original 10-phase data set acquired at 10&#37; intervals over the R-R interval with the computationally intense optimal flow algorithm producing a three-dimensional 100-phase data set throughout a cardiac cycle, and measures automatically the length for the margin of short- and long-axis of left ventricle. This can demonstrate the detail information on left ventricular deformation in both systole and diastole. Here, we present the clinical implication on CT myocardial strain using motion coherence analysis for aortic valve disease.

  • Detectability of T1a lung cancer on digital chest radiographs An observer-performance comparison among 2-megapixel general-purpose, 2-megapixel medical-purpose, and 3-megapixel medical-purpose liquid-crystal display (LCD) monitors 査読

    Hidetake Yabuuchi, Yoshio Matsuo, Takeshi Kamitani, Mikako Jinnnouchi, Masato Yonezawa, Yuzo Yamasaki, Michinobu Nagao, Satoshi Kawanami, Tatsuro Okamoto, Masayuki Sasaki, Hiroshi Honda

    Acta Radiologica   56 ( 8 )   943 - 949   2015年1月

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    記述言語:英語  

    Background: There has been no comparison of detectability of small lung cancer between general and medical LCD monitors or no comparison of detectability of small lung cancer between solid and part-solid nodules. Purpose: To compare the detectabilities of T1a lung cancer on chest radiographs on three LCD monitor types: 2-megapixel (MP) for general purpose (General), 2-MP for medical purpose (Medical), and 3-MP-Medical. Material and Methods: Radiographs from forty patients with T1aN0M0 primary lung cancer (27 solid nodules, 13 part-solid nodules) and 60 patients with no abnormalities on both chest X-ray and computed tomography (CT) were consecutively collected. Five readers assessed 100 cases for each monitor. The observations were analyzed using receiver operating characteristic (ROC) analysis. A jackknife method was used for statistical analysis. A P value of <0.05 was considered significant. Results: The average AUC for all T1a lung cancer nodule detection using the 2-MP-General, 2-MP-Medical, and 3-MP-Medical LCD monitors were 0.86, 0.89, and 0.89, respectively; there were no significant differences among them. The average AUC for part-solid nodule detection using a 2-MP-General, 2-MP-Medical, and 3-MP-Medical LCD monitors were 0.77, 0.86, and 0.89, respectively. There were significant differences between the 2-MP-General and 2-MP-Medical LCD monitors (P=0.043) and between the 2-MP-General and 3-MP-Medical LCD monitors (P=0.027). There was no significant difference between the 2-MP-Medical and 3-MP-Medical LCD monitors. The average AUC for solid nodule detection using a 2-MP-General, 2-MP-Medical, and 3-MP-Medical LCD monitors were 0.90, 0.90, and 0.88, respectively; there were no significant differences among them. The mean AUC values for all and part-solid nodules of the low-experienced readers were significantly lower than those of the high-experienced readers with the 2 M-GP color LCD monitor (P<0.05). Conclusion: Detectability of part-solid nodules using a general-purpose LCD monitor was significantly lower than those using medical-purpose LCD monitors.

    DOI: 10.1177/0284185114544244

  • 【形態画像を用いた核医学画像解析】心臓核医学とMRIの融合 心筋症における新たな可能性

    長尾 充展, 馬場 眞吾, 米澤 政人, 山崎 誘三, 神谷 武志, 川波 哲, 磯田 拓郎, 丸岡 保博, 北村 宣之, 本田 浩

    臨床放射線   59 ( 13 )   1812 - 1820   2014年12月

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    記述言語:日本語  

  • Quantitative assessment of right ventricular function and pulmonary regurgitation in surgically repaired tetralogy of Fallot using 256-slice CT comparison with 3-Tesla MRI 査読

    Yuzo Yamasaki, Michinobu Nagao, Kenichiro Yamamura, Masato Yonezawa, Yoshio Matsuo, Satoshi Kawanami, Takeshi Kamitani, Ko Higuchi, Ichiro Sakamoto, Yuichi Shiokawa, Hidetake Yabuuchi, Hiroshi Honda

    European Radiology   24 ( 12 )   3289 - 3299   2014年11月

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    記述言語:英語  

    Objectives: To compare 256-slice cardiac computed tomography (CCT) with cardiac magnetic resonance (CMR) imaging to assess right ventricular (RV) function and pulmonary regurgitant fraction (PRF) in patients with repaired tetralogy of Fallot (TOF).
    Methods: Thirty-three consecutive patients with repaired TOF underwent retrospective ECG-gated CCT and 3-Tesla CMR. RV and left ventricular (LV) end-diastolic volume (EDV), end-systolic volume (ESV), stroke volume (SV) and ejection fraction (EF) were measured using CCT and CMR. PRF-CCT (&#37;) was defined as (RVSV − LVSV)/RVSV. PRF-CMR (&#37;) was measured by the phase-contrast method. Repeated measurements were performed to determine intra- and interobserver variability.
    Results: CCT measurements, including PRF, correlated highly with the CMR reference (r = 0.71–0.96). CCT overestimated RVEDV (mean difference, 17.1 ± 2.9 ml), RVESV (12.9 ± 2.1 ml) and RVSV (4.2 ± 2.0 ml), and underestimated RVEF (−2.6 ± 1.0 &#37;) and PRF (−9.1 ± 2.0 &#37;) compared with CMR. The limits of agreement between CCT and CMR were in a good range for all measurements. The variability in CCT measurements was lower than those in CMR. The estimated effective radiation dose was 7.6 ± 2.6 mSv.
    Conclusions: 256-slice CCT can assess RV function and PRF with relatively low dose radiation exposure in patients with repaired TOF, but overestimates RV volume and underestimates PRF.
    Key points: • 256-slice CT assessment of RV function is highly reproducible in repaired TOF.
    • Pulmonary regurgitation can be evaluated by biventricular systolic volume difference.
    • CT overestimates RV volume and underestimates pulmonary regurgitation, compared with MRI.

    DOI: 10.1007/s00330-014-3344-1

  • Detectability of simulated interstitial pneumonia on chest radiographs Comparison between irradiation side sampling indirect flat-panel detector and computed radiography 査読

    Y. Yano, H. Yabuuchi, A. Kairada, N. Tanaka, J. Morishita, T. Akasaka, Y. Matsuo, T. Kamitani, Y. Yamasaki, M. Nagao, M. Sasaki

    British Journal of Radiology   87 ( 1040 )   2014年8月

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    記述言語:英語  

    Objective: To compare the detectability of simulated interstitial pneumonia on chest radiographs between an irradiation side sampling indirect flat-panel detector (ISSFPD) and computed radiography (CR).
    Methods: Simulated interstitial pneumonia findings (ground-glass opacity, reticular opacity and honeycomb lung) were superimposed on an anthropomorphic chest phantom. Chest radiographs were acquired under three exposure levels (4.0, 3.2 and 2.0mAs) with an ISS-FPD and with CR. 5 thoracic radiologists evaluated 72 images for the presence or absence of a lesion over each of 6 areas. A total of 1296 observations were analysed in a receiver-operating characteristic analysis. A jackknife method was used for the statistical analysis.
    Results: The areas under the curves (AUCs) for the detection of simulated honeycomb lung obtained with the ISS-FPD were significantly larger than those obtained with CR at all exposure conditions. For the detection of simulated ground-glass opacity and reticular opacity, there were no significant differences between the two systems. In addition, the AUCs for the detectability of simulated honeycomb lung obtained with the ISS-FPD at all exposure levels were significantly larger than those obtained with CR at 4mAs.
    Conclusion: The ISS-FPD was superior to CR for the detection of simulated honeycomb lung. Provided that the chosen model is representative of interstitial pneumonia, the use of an ISS-FPD might reduce a patient's exposure dose during the detection of interstitial pneumonia.
    Advances in knowledge: The ISS-FPD has shown its advantage compared with CR in the detection of honeycombing, one sign of interstitial pneumonia.

    DOI: 10.1259/bjr.20140075

  • Differentiation between benign phyllodes tumors and fibroadenomas of the breast on MR imaging 査読 国際誌

    Takeshi Kamitani, Yoshio Matsuo, Hidetake Yabuuchi, Nobuhiro Fujita, Michinobu Nagao, Satoshi Kawanami, Masato Yonezawa, Yuzo Yamasaki, Eriko Tokunaga, Makoto Kubo, Hidetaka Yamamoto, Hiroshi Honda

    European Journal of Radiology   83 ( 8 )   1344 - 1349   2014年8月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    Purpose The purpose of this study was to determine the factors that contribute to the differentiation between phyllodes tumors (PTs) and fibroadenomas (FAs) on MR imaging. Materials and methods This retrospective study included 19 PTs and 18 FAs with ≥2 cm diameter. The presence or absence of a capsule and internal septum, the extent of lobulation, and the apparent diffusion coefficient (ADC) values were determined. The presence or absence of a cystic component, the time-intensity curve, and the signal intensity on delayed-phase contrast-enhanced T1WI were also evaluated in 31 patients (16 PTs and 17 FAs) who underwent a contrast-enhanced study. Results Cystic components were seen in 10 of the 16 PTs (63&#37;) and in 4 of the 17 FAs (24&#37;; P = 0.03). The PTs showed strong lobulation more frequently compared to the FAs (14/19 [74&#37;] vs. 7/18 [39&#37;], respectively; P = 0.04). Though there was no significant difference, PT tended to be heterogeneous more frequently on the delayed phase of the contrast-enhanced T1WI compared to the FA (11/16 [69&#37;] vs. 7/17 [41&#37;], respectively). No significant difference was found in the other findings. Conclusions Although PTs and FAs show similar MR findings, the presence of a cystic component, strong lobulation, and heterogeneity on delayed-phase contrast-enhanced T1WI suggests a PT.

    DOI: 10.1016/j.ejrad.2014.04.031

  • Improvement of automated right ventricular segmentation using dual-bolus contrast media injection with 256-slice coronary CT angiography 査読 国際誌

    Masatoshi Kondo, Michinobu Nagao, Masato Yonezawa, Yuzo Yamazaki, Takashi Shirasaka, Yasuhiko Nakamura, Hiroshi Honda

    Academic Radiology   21 ( 5 )   648 - 653   2014年5月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    Rationale and Objectives: To investigate the effect of dual-bolus contrast media injection (dual-CM) on the accuracy of automated right ventricular (RV) segmentation on coronary computed tomography angiography (CCTA). Materials and Methods: A total of 104 patients with suspected and known coronary artery disease underwent 256-slice CCTA with retrospective electrocardiographic (ECG) gating. The patients were divided into 51 patients who underwent single-bolus CM injection (single-CM) and 53 patients who underwent dual-CM. The dual-CM method consisted of an initial bolus of CM followed by an injection of dilute CM with saline (CM:saline, 1:9). Three-dimensional CCTA images were automatically segmented into the RV, left ventricle (LV), and myocardium using commercially available software (Comprehensive Cardiac Analysis; Philips Medical Systems, Cleveland, OH). Prevalence and locations of segmentation errors were compared between single-CM and dual-CM. Segmentation errors were defined as segment deviation of >1cm from the actual ventricular margin. Results: Prevalence of segmentation errors was significantly lower with dual-CM than with single-CM in the diastolic phase (4/41 vs. 20/41, respectively; P<.01), and there was no difference between the two methods in the systolic phase (2/12 vs. 2/10, respectively). With dual-CM and single-CM, the locations of segmentation errors were mostly the RV wall (4/53 and 18/51, respectively) and secondly the LV wall (2/53 and 9/51, respectively). Conclusions: Dual-CM improved the accuracy of automated ventricular segmentation using diastolic data from 256-slice CCTA.

    DOI: 10.1016/j.acra.2014.01.022

  • Quantification of myocardial iron deficiency in nonischemic heart failure by cardiac T2* magnetic resonance imaging 査読

    Michinobu Nagao, Yoshio Matsuo, Takeshi Kamitani, Masato Yonezawa, Yuzo Yamasaki, Satoshi Kawanami, Kohtaro Abe, Yasushi Mukai, Taiki Higo, Hidetake Yabuuchi, Atsushi Takemura, Takashi Yoshiura, Kenji Sunagawa, Hiroshi Honda

    American Journal of Cardiology   113 ( 6 )   1024 - 1030   2014年3月

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    記述言語:英語  

    The aim of this study was to use T2* cardiac magnetic resonance (CMR) imaging to quantify myocardial iron content in patients with heart failure (HF) and to investigate the relation between iron content, cardiac function, and the cause of HF. CMR data were analyzed from 167 patients with nonischemic and 31 with ischemic HF and 50 patients with normal ventricular function. Short-axis T2* imaging was accomplished using 3-T scanner and multiecho gradient-echo sequence. Myocardial T2* value (M-T2*) was calculated by fitting the signal intensity data for the mid-left ventricular (LV) septum to a decay curve. Patients with nonischemic HF were categorized into patients with LV ejection fraction (LVEF) <35&#37; or ≥35&#37;. The relation between nonischemic HF with LVEF <35&#37; and the risk for major adverse cardiac events was analyzed by multivariate logistic regression analysis using M-T2* and HF biomarkers. M-T2* was significantly greater for patients with nonischemic HF (LVEF <35&#37;: 29 ± 7 ms, LVEF ≥35&#37;: 26 ± 5 ms) than for patients with normal LV function (22 ± 3 ms, p <0.0001) or ischemic HF (22 ± 4 ms, p <0.001). The odds ratio was 1.21 for M-T2* (p <0.0001) and 1.0015 for brain natriuretic peptide (p <0.0001) in relation to nonischemic HF with LVEF <35&#37;. Furthermore, this value was 0.96 for systolic blood pressure (p = 0.012) and 1.02 for M-T2* (p = 0.03) in relation to the risk for major adverse cardiac events in patients with nonischemic HF. In conclusion, T2* CMR demonstrated the robust relation between myocardial iron deficiency and nonischemic HF. M-T2* is a biomarker that can predict adverse cardiac function in patients with nonischemic HF.

    DOI: 10.1016/j.amjcard.2013.11.061

  • Geometrical characteristics of left ventricular dyssynchrony in advanced heart failure Myocardial strain analysis by tagged MRI 査読

    Michinobu Nagao, Yuzo Yamasaki, Masato Yonezawa, Takeshi Kamitani, Satoshi Kawanami, Yasushi Mukai, Taiki Higo, Hidetake Yabuuchi, Kenji Sunagawa, Hiroshi Honda

    International heart journal   55 ( 6 )   512 - 518   2014年1月

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    記述言語:英語  

    The aims of this study were to quantify the geometrical differences in left ventricular (LV) dyssynchrony in patients with heart failure (HF) using cine-tagged MRI, and to investigate the relationship between dyssynchrony and major adverse cardiac events (MACE) in HF.
    In 67 patients with HF [mean LV ejection fraction (LVEF), 34&#37;], cardiac MRI using a 3-Tesla scanner was performed. The dyssynchrony time between septal and lateral segments (SL-DT) and between basal and apical segments (BA-DT) was computed by cross-correlation analysis of the strain time-curves from the cine-tagged MRI. After receiving optimal medical treatment, all patients were followed-up for a mean period of 27 months. The primary endpoint was MACE that consisted of cardiac death or HF hospitalization or a left ventricular assist device due to refractory pump failure. Multivariate logistic regression analysis was performed to determine the ability of SL-DT, BA-DT, and HF biomarkers to predict MACE.
    Multivariate logistic regression analysis showed that the odds ratio to predict MACE was 0.935 for LVEF (P = 0.021), 1.016 for BA-DT (P = 0.026), and 0.971 for systolic blood pressure (P = 0.126).
    The results show that basal-apical dyssynchrony is an independent predictor of MACE in HF patients.

    DOI: 10.1536/ihj.14-137

  • Fusion of cardiac nuclear medicine and MRI New insight in cardiomyopathy 査読

    M. Nagao, S. Kawanami, S. Baba, M. Yonezawa, Y. Yamasaki, T. Kamitani, T. Isoda, Y. Maruoka, N. Kitamura, H. Honda

    Japanese Journal of Clinical Radiology   59 ( 13 )   1812 - 1820   2014年1月

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    記述言語:英語  

    Here we propose the fusion imaging of myocardial SPECT/PET and MRI, and demonstrate new insights in dilated cardiomyopathy (DCM) and cardiac sarcoidosis. In DCM, impaired cardiac sympathetic activity expressed by MIBG scintigraphy was associated with spatial dyssynchrony obtained from tagging MRI. Myocardial T2 value and MIBG uptake were independents predictors of major cardiac adverse events in DCM. Fusion image of late gadolinium enhanced MRI and FDG-PET helps to differentiate cardiac sarcoidosis from myocarditis and DCM. Myocardial thickening and T2 high intensity on MRI and high myocardial uptake on FDG-PET were often seen in non-responder to steroid therapy in cardiac sarcoidosis.

  • Prosthetic valve dysfunction in repaired tetralogy of Fallot Assessment by FDG-PET and 256-slice 4D-CT 査読

    Yuzo Yamasaki, Michinobu Nagao, Ichiro Sakamoto, Masato Yonezawa, Hiroshi Honda

    European heart journal cardiovascular Imaging   15 ( 11 )   2014年1月

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    記述言語:英語  

    DOI: 10.1093/ehjci/jeu108

  • Geometrical characteristics of left ventricular dyssynchrony in advanced heart failure Myocardial strain analysis by tagged MRI 査読

    Michinobu Nagao, Yuzo Yamasaki, Masato Yonezawa, Takeshi Kamitani, Satoshi Kawanami, Yasushi Mukai, Taiki Higo, Hidetake Yabuuchi, Kenji Sunagawa, Hiroshi Honda

    International heart journal   55 ( 6 )   512 - 518   2014年1月

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    記述言語:英語  

    The aims of this study were to quantify the geometrical differences in left ventricular (LV) dyssynchrony in patients with heart failure (HF) using cine-tagged MRI, and to investigate the relationship between dyssynchrony and major adverse cardiac events (MACE) in HF.
    In 67 patients with HF [mean LV ejection fraction (LVEF), 34&#37;], cardiac MRI using a 3-Tesla scanner was performed. The dyssynchrony time between septal and lateral segments (SL-DT) and between basal and apical segments (BA-DT) was computed by cross-correlation analysis of the strain time-curves from the cine-tagged MRI. After receiving optimal medical treatment, all patients were followed-up for a mean period of 27 months. The primary endpoint was MACE that consisted of cardiac death or HF hospitalization or a left ventricular assist device due to refractory pump failure. Multivariate logistic regression analysis was performed to determine the ability of SL-DT, BA-DT, and HF biomarkers to predict MACE.
    Multivariate logistic regression analysis showed that the odds ratio to predict MACE was 0.935 for LVEF (P = 0.021), 1.016 for BA-DT (P = 0.026), and 0.971 for systolic blood pressure (P = 0.126).
    The results show that basal-apical dyssynchrony is an independent predictor of MACE in HF patients.

    DOI: 10.1536/ihj.14-137

  • Prosthetic valve dysfunction in repaired tetralogy of Fallot Assessment by FDG-PET and 256-slice 4D-CT 査読

    Yuzo Yamasaki, Michinobu Nagao, Ichiro Sakamoto, Masato Yonezawa, Hiroshi Honda

    European heart journal cardiovascular Imaging   15 ( 11 )   2014年1月

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    記述言語:英語  

    DOI: 10.1093/ehjci/jeu108

  • Detectability of simulated pulmonary nodules on chest radiographs Comparison between irradiation side sampling indirect flat-panel detector and computed radiography 査読

    Yuki Yano, Hidetake Yabuuchi, Nobukazu Tanaka, Junji Morishita, Tsutomu Akasaka, Yoshio Matsuo, Shunya Sunami, Takeshi Kamitani, Mikako Jinnouchi, Yuzo Yamasaki, Michinobu Nagao, Masayuki Sasaki

    European Journal of Radiology   82 ( 11 )   2050 - 2054   2013年11月

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    記述言語:英語  

    Objective To compare the detectability of simulated pulmonary nodules on chest radiographs between an irradiation side sampling indirect flat-panel detector (ISS-FPD) and computed radiography (CR). Materials and methods This study was an observer performance study. Simulated pulmonary nodules of 8 mm in diameter were superimposed on an anthropomorphic chest phantom. Chest radiographs were acquired under 2 exposure levels (4 and 3.2 mAs) with the ISS-FPD and the CR. Six thoracic radiologists evaluated all 40 images (10 patterns × 2 different exposure doses × 2 different systems) for the presence or absence of a lesion over each of 12 defined areas on a 3-megapixel monochrome liquid-crystal display. Receiver operating characteristic (ROC) curves were obtained for observation in predefined 480 areas. A jackknife method was used for statistical analysis. Differences with a P value of <0.05 were considered significant. Results The analysis of the observer detection of simulated pulmonary nodules showed larger areas under the ROC curve (AUC) by the ISS-FPD than by the CR. There was a statistically significant difference between the two systems at 3.2 mAs (P = 0.0330). Conclusion The ISS-FPD was superior to the CR for the detection of simulated pulmonary nodules at 3.2 mAs.

    DOI: 10.1016/j.ejrad.2013.05.036

  • Detectability of simulated pulmonary nodules on chest radiographs Comparison between irradiation side sampling indirect flat-panel detector and computed radiography 査読

    Yuki Yano, Hidetake Yabuuchi, Nobukazu Tanaka, Junji Morishita, Tsutomu Akasaka, Yoshio Matsuo, Shunya Sunami, Takeshi Kamitani, Mikako Jinnouchi, Yuzo Yamasaki, Michinobu Nagao, Masayuki Sasaki

    European Journal of Radiology   82 ( 11 )   2050 - 2054   2013年11月

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    記述言語:英語  

    Objective To compare the detectability of simulated pulmonary nodules on chest radiographs between an irradiation side sampling indirect flat-panel detector (ISS-FPD) and computed radiography (CR). Materials and methods This study was an observer performance study. Simulated pulmonary nodules of 8 mm in diameter were superimposed on an anthropomorphic chest phantom. Chest radiographs were acquired under 2 exposure levels (4 and 3.2 mAs) with the ISS-FPD and the CR. Six thoracic radiologists evaluated all 40 images (10 patterns × 2 different exposure doses × 2 different systems) for the presence or absence of a lesion over each of 12 defined areas on a 3-megapixel monochrome liquid-crystal display. Receiver operating characteristic (ROC) curves were obtained for observation in predefined 480 areas. A jackknife method was used for statistical analysis. Differences with a P value of <0.05 were considered significant. Results The analysis of the observer detection of simulated pulmonary nodules showed larger areas under the ROC curve (AUC) by the ISS-FPD than by the CR. There was a statistically significant difference between the two systems at 3.2 mAs (P = 0.0330). Conclusion The ISS-FPD was superior to the CR for the detection of simulated pulmonary nodules at 3.2 mAs.

    DOI: 10.1016/j.ejrad.2013.05.036

  • Correlations between apparent diffusion coefficient values and prognostic factors of breast cancer 査読

    Takeshi Kamitani, Yoshio Matsuo, Hidetake Yabuuchi, Nobuhiro Fujita, Michinobu Nagao, Mikako Jinnouchi, Masato Yonezawa, Yuzo Yamasaki, Eriko Tokunaga, Makoto Kubo, Hidetaka Yamamoto, Takashi Yoshiura, Hiroshi Honda

    Magnetic Resonance in Medical Sciences   12 ( 3 )   193 - 199   2013年10月

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    記述言語:英語  

    Purpose: We investigated possible correlations between apparent diffusion coefficient (ADC) values and prognostic factors of breast cancer. Methods: We retrospectively evaluated 81 patients who underwent magnetic resonance (MR) imaging of the breast and were diagnosed pathologically with invasive ductal carcinoma (IDC) not otherwise specified with invasive foci one cm or larger. We excluded ductal carcinoma in situ and IDC with invasive foci smaller than one cm because small lesions decrease the reliability of signal intensity of diffusion-weighted imaging (DWI).We also excluded special type cancers. We used t-test to compare the mean ADC values of cancers of Stage pT1 (> 2 cm) versus pT2 or 3 (≤ 2 cm), cancers with versus without vascular invasion, axillary lymph node (N)-positive versus N-negative cancers, estrogen receptor (ER)- positive versus ER-negative cancers, and progesterone receptor (PgR)-positive versus PgRnegative cancers. We analyzed correlations between the ADC value with nuclear grade (NG) and human epidermal growth factor receptor 2 (HER2) score by rank test using Spearman's correlation coefficient. Results: The mean ADC value was significantly higher for N-positive (n=28; 0.97±0.20 ×10-3 mm2/s) than N-negative cancers (n=53; 0.87±0.17×10-3 mm2/s) (P=0.017); significantly lower for ER-positive (n=63; 0.88±0.15×10-3 mm2/s) than ER-negative cancers (n=18; 1.01±0.21×10-3 mm2/s) (P=0.005); and significantly lower for PgR-positive (n=47; 0.88±0.16×10-3 mm2/s) than PgR-negative cancers (n=34; 0.95±0.18×10-3 mm2/s) (P=0.048). Tumor size, vascular invasion, NG, and HER2 status showed no significant correlation with ADC values. Conclusion: ADC values were higher for N-positive and ER-negative breast cancers than N-negative and ER-positive cancers.

    DOI: 10.2463/mrms.2012-0095

  • Correlations between apparent diffusion coefficient values and prognostic factors of breast cancer 査読

    Takeshi Kamitani, Yoshio Matsuo, Hidetake Yabuuchi, Nobuhiro Fujita, Michinobu Nagao, Mikako Jinnouchi, Masato Yonezawa, Yuzo Yamasaki, Eriko Tokunaga, Makoto Kubo, Hidetaka Yamamoto, Takashi Yoshiura, Hiroshi Honda

    Magnetic Resonance in Medical Sciences   12 ( 3 )   193 - 199   2013年10月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    Purpose: We investigated possible correlations between apparent diffusion coefficient (ADC) values and prognostic factors of breast cancer. Methods: We retrospectively evaluated 81 patients who underwent magnetic resonance (MR) imaging of the breast and were diagnosed pathologically with invasive ductal carcinoma (IDC) not otherwise specified with invasive foci one cm or larger. We excluded ductal carcinoma in situ and IDC with invasive foci smaller than one cm because small lesions decrease the reliability of signal intensity of diffusion-weighted imaging (DWI).We also excluded special type cancers. We used t-test to compare the mean ADC values of cancers of Stage pT1 (> 2 cm) versus pT2 or 3 (≤ 2 cm), cancers with versus without vascular invasion, axillary lymph node (N)-positive versus N-negative cancers, estrogen receptor (ER)- positive versus ER-negative cancers, and progesterone receptor (PgR)-positive versus PgRnegative cancers. We analyzed correlations between the ADC value with nuclear grade (NG) and human epidermal growth factor receptor 2 (HER2) score by rank test using Spearman's correlation coefficient. Results: The mean ADC value was significantly higher for N-positive (n=28; 0.97±0.20 ×10-3 mm2/s) than N-negative cancers (n=53; 0.87±0.17×10-3 mm2/s) (P=0.017); significantly lower for ER-positive (n=63; 0.88±0.15×10-3 mm2/s) than ER-negative cancers (n=18; 1.01±0.21×10-3 mm2/s) (P=0.005); and significantly lower for PgR-positive (n=47; 0.88±0.16×10-3 mm2/s) than PgR-negative cancers (n=34; 0.95±0.18×10-3 mm2/s) (P=0.048). Tumor size, vascular invasion, NG, and HER2 status showed no significant correlation with ADC values. Conclusion: ADC values were higher for N-positive and ER-negative breast cancers than N-negative and ER-positive cancers.

    DOI: 10.2463/mrms.2012-0095

  • Relationship between impaired cardiac sympathetic activity and spatial dyssynchrony in patients with non-ischemic heart failure Assessment by MIBG scintigraphy and tagged MRI 査読

    Masato Yonezawa, Michinobu Nagao, Koichiro Abe, Yoshio Matsuo, Shingo Baba, Takeshi Kamitani, Takuro Isoda, Yasuhiro Maruoka, Mikako Jinnouchi, Yuzo Yamasaki, Kohtaro Abe, Taiki Higo, Takashi Yoshiura, Hiroshi Honda

    Journal of Nuclear Cardiology   20 ( 4 )   600 - 608   2013年8月

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    記述言語:英語  

    Background: Impairment of cardiac sympathetic activity has various detrimental effects on cardiac function. The purpose was to investigate the relationship between left ventricular (LV) dyssynchrony and cardiac sympathetic activity in non-ischemic heart failure (HF). Methods: Twenty-seven patients with non-ischemic HF were enrolled. Cardiac sympathetic activity was assessed by heart-to-mediastinum ratio (H/M ratio) on 123I- Metaiodobenzylguanidine scintigraphy. LV dyssynchrony was assessed by cross-correlation analysis of time curves of myocardial circumferential strains delivered from cine-tagging MR images. Temporal dyssynchrony was defined as contraction delay between septal and lateral segments >110 milliseconds. Spatial dyssynchrony was defined as the negative value of the maximum correlation for the two strain time curves. Results: H/M ratio was significantly lower for patients with spatial dyssynchrony compared to patients without (1.8 ± 0.3 vs 2.1 ± 0.3, P <.05). There was no difference between patients with and without temporal dyssynchrony (2.0 ± 0.2 vs 2.0 ± 0.3). The incidence of spatial dyssynchrony was significantly higher in patients with H/M ratio <2.0 than those whose ratios were ≥2.0 (75&#37; vs 20&#37;, P =.001). There was no difference in the incidence of temporal dyssynchrony between the two groups (17&#37; vs 20&#37;). Conclusion: Impairment of cardiac sympathetic activity was found to be associated with spatial dyssynchrony in patients with non-ischemic HF.

    DOI: 10.1007/s12350-013-9715-1

  • Relationship between impaired cardiac sympathetic activity and spatial dyssynchrony in patients with non-ischemic heart failure Assessment by MIBG scintigraphy and tagged MRI 査読

    Masato Yonezawa, Michinobu Nagao, Koichiro Abe, Yoshio Matsuo, Shingo Baba, Takeshi Kamitani, Takuro Isoda, Yasuhiro Maruoka, Mikako Jinnouchi, Yuzo Yamasaki, Kohtaro Abe, Taiki Higo, Takashi Yoshiura, Hiroshi Honda

    Journal of Nuclear Cardiology   20 ( 4 )   600 - 608   2013年8月

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    記述言語:英語  

    Background: Impairment of cardiac sympathetic activity has various detrimental effects on cardiac function. The purpose was to investigate the relationship between left ventricular (LV) dyssynchrony and cardiac sympathetic activity in non-ischemic heart failure (HF). Methods: Twenty-seven patients with non-ischemic HF were enrolled. Cardiac sympathetic activity was assessed by heart-to-mediastinum ratio (H/M ratio) on 123I- Metaiodobenzylguanidine scintigraphy. LV dyssynchrony was assessed by cross-correlation analysis of time curves of myocardial circumferential strains delivered from cine-tagging MR images. Temporal dyssynchrony was defined as contraction delay between septal and lateral segments >110 milliseconds. Spatial dyssynchrony was defined as the negative value of the maximum correlation for the two strain time curves. Results: H/M ratio was significantly lower for patients with spatial dyssynchrony compared to patients without (1.8 ± 0.3 vs 2.1 ± 0.3, P <.05). There was no difference between patients with and without temporal dyssynchrony (2.0 ± 0.2 vs 2.0 ± 0.3). The incidence of spatial dyssynchrony was significantly higher in patients with H/M ratio <2.0 than those whose ratios were ≥2.0 (75&#37; vs 20&#37;, P =.001). There was no difference in the incidence of temporal dyssynchrony between the two groups (17&#37; vs 20&#37;). Conclusion: Impairment of cardiac sympathetic activity was found to be associated with spatial dyssynchrony in patients with non-ischemic HF.

    DOI: 10.1007/s12350-013-9715-1

  • Detection of ground-glass opacities by use of hybrid iterative reconstruction (iDose) and low-dose 256-section computed tomography A phantom study 査読

    Ko Higuchi, Michinobu Nagao, Yoshio Matsuo, Shunya Sunami, Takeshi Kamitani, Mikako Jinnouchi, Masato Yonezawa, Yuzo Yamasaki, Hidetake Yabuuchi, Masamitsu Hatkenaka, Hiroshi Honda

    Radiological physics and technology   6 ( 2 )   299 - 304   2013年7月

     詳細を見る

    記述言語:英語  

    The detection of ground-glass opacities (GGOs) is an important issue in lung cancer screening with low-dose CT. The iterative reconstruction (IR) technique has the ability to improve the image quality relative to the filtered back projection (FBP) technique with low-dose CT. Our purpose was to investigate the ability to detect GGO in a chest phantom using a low-dose CT and hybrid IR, named iDose. Simulated GGOs in a chest phantom were scanned with 256-section CT at tube current second products of 20, 50, 100, and 200 mAs. Five radiologists visually assessed the detectability of GGOs in the phantom. The contrast-to-noise ratio (CNR) for GGOs was used as an estimate of image quality. Comparison of the detectability and CNR between standard images with 200 mAs-FBP and low-dose images with 20, 50, and 100-mAs FBP/iDose were performed by ANOVA with Dunnett's and Tukey's test. The detectability was significantly lower at 20-mAs FBP/iDose and 50-mAs FBP than that at 200-mAs FBP (p < 0.05). There was no significant difference between 50-mAs iDose and 200-mAs FBP and between 100-mAs iDose/FBP and 200-mAs FBP. The CNR was significantly higher on iDose images than that on FBP images at each mAs value. The CNR at 200-mAs FBP was the same as that at 50-mAs iDose (CNR:1.8). The hybrid IR technique and low-dose CT imaging with 50 mAs enabled noise and to maintain the detectability for GGOs in a chest phantom that is equivalent to the reference acquisitions of 200 mAs with FBP.

    DOI: 10.1007/s12194-013-0200-y

  • Detection of ground-glass opacities by use of hybrid iterative reconstruction (iDose) and low-dose 256-section computed tomography A phantom study 査読

    Ko Higuchi, Michinobu Nagao, Yoshio Matsuo, Shunya Sunami, Takeshi Kamitani, Mikako Jinnouchi, Masato Yonezawa, Yuzo Yamasaki, Hidetake Yabuuchi, Masamitsu Hatkenaka, Hiroshi Honda

    Radiological physics and technology   6 ( 2 )   299 - 304   2013年7月

     詳細を見る

    記述言語:英語  

    The detection of ground-glass opacities (GGOs) is an important issue in lung cancer screening with low-dose CT. The iterative reconstruction (IR) technique has the ability to improve the image quality relative to the filtered back projection (FBP) technique with low-dose CT. Our purpose was to investigate the ability to detect GGO in a chest phantom using a low-dose CT and hybrid IR, named iDose. Simulated GGOs in a chest phantom were scanned with 256-section CT at tube current second products of 20, 50, 100, and 200 mAs. Five radiologists visually assessed the detectability of GGOs in the phantom. The contrast-to-noise ratio (CNR) for GGOs was used as an estimate of image quality. Comparison of the detectability and CNR between standard images with 200 mAs-FBP and low-dose images with 20, 50, and 100-mAs FBP/iDose were performed by ANOVA with Dunnett's and Tukey's test. The detectability was significantly lower at 20-mAs FBP/iDose and 50-mAs FBP than that at 200-mAs FBP (p < 0.05). There was no significant difference between 50-mAs iDose and 200-mAs FBP and between 100-mAs iDose/FBP and 200-mAs FBP. The CNR was significantly higher on iDose images than that on FBP images at each mAs value. The CNR at 200-mAs FBP was the same as that at 50-mAs iDose (CNR:1.8). The hybrid IR technique and low-dose CT imaging with 50 mAs enabled noise and to maintain the detectability for GGOs in a chest phantom that is equivalent to the reference acquisitions of 200 mAs with FBP.

    DOI: 10.1007/s12194-013-0200-y

  • Evaluation of chronic ischemic heart disease with myocardial perfusion and regional contraction analysis by contrast-enhanced 256-MSCT 査読

    Ko Higuchi, Michinobu Nagao, Yoshio Matsuo, Takeshi Kamitani, Masato Yonezawa, Mikako Jinnouchi, Yuzo Yamasaki, Koichiro Abe, Shingo Baba, Yasushi Mukai, Taiki Higo, Kenji Sunagawa, Hiroshi Honda

    Japanese Journal of Radiology   31 ( 2 )   123 - 132   2013年2月

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    記述言語:英語  

    Purpose: To investigate myocardial viability in chronic ischemic heart disease by myocardial perfusion and regional contraction analysis using 256-slice MSCT coronary angiography (CCTA). Methods: In 30 patients with prior myocardial infarction (MI), CCTA with retrospective ECG-gating and stress-redistribution thallium-201 SPECT were performed. Using the same raw data as used for CCTA, myocardial perfusion imaging (CT-MPI) was reconstructed at four phases during the cardiac cycle. Mean myocardial attenuation and wall thickness at end-systole and end-diastole were measured in the MI areas depicted by SPECT, and they were compared between viable and non-viable segments categorized by SPECT. Results: End-systolic thickness was significantly greater for viable than for non-viable segments (12.0 ± 3.2 vs. 9.6 ± 3.5 mm, p = 0.0017). There was no difference in end-diastolic thickness. Myocardial attenuation was significantly higher for viable than for non-viable segments in the subendocardium (62 ± 13 vs. 70 ± 11 HU, p = 0.003) and the epicardium (65 ± 13 vs. 80 ± 15 HU, p = 0.0002). Conclusion: The systolic wall thinning and epicardial low-attenuation areas were the indicative findings of CT-MPI for non-viable segments in the prior MI.

    DOI: 10.1007/s11604-012-0159-3

  • Evaluation of chronic ischemic heart disease with myocardial perfusion and regional contraction analysis by contrast-enhanced 256-MSCT 査読

    Ko Higuchi, Michinobu Nagao, Yoshio Matsuo, Takeshi Kamitani, Masato Yonezawa, Mikako Jinnouchi, Yuzo Yamasaki, Koichiro Abe, Shingo Baba, Yasushi Mukai, Taiki Higo, Kenji Sunagawa, Hiroshi Honda

    Japanese Journal of Radiology   31 ( 2 )   123 - 132   2013年2月

     詳細を見る

    記述言語:英語  

    Purpose: To investigate myocardial viability in chronic ischemic heart disease by myocardial perfusion and regional contraction analysis using 256-slice MSCT coronary angiography (CCTA). Methods: In 30 patients with prior myocardial infarction (MI), CCTA with retrospective ECG-gating and stress-redistribution thallium-201 SPECT were performed. Using the same raw data as used for CCTA, myocardial perfusion imaging (CT-MPI) was reconstructed at four phases during the cardiac cycle. Mean myocardial attenuation and wall thickness at end-systole and end-diastole were measured in the MI areas depicted by SPECT, and they were compared between viable and non-viable segments categorized by SPECT. Results: End-systolic thickness was significantly greater for viable than for non-viable segments (12.0 ± 3.2 vs. 9.6 ± 3.5 mm, p = 0.0017). There was no difference in end-diastolic thickness. Myocardial attenuation was significantly higher for viable than for non-viable segments in the subendocardium (62 ± 13 vs. 70 ± 11 HU, p = 0.003) and the epicardium (65 ± 13 vs. 80 ± 15 HU, p = 0.0002). Conclusion: The systolic wall thinning and epicardial low-attenuation areas were the indicative findings of CT-MPI for non-viable segments in the prior MI.

    DOI: 10.1007/s11604-012-0159-3

  • 診療 256列CTを用いた冠動脈狭窄度とタリウム心筋血流SPECTによる虚血との関連 (胸部の最新画像情報2012) 査読

    米澤 政人, 長尾 充展, 樋口 江

    臨床放射線   57 ( 1 )   136 - 141   2012年1月

     詳細を見る

    記述言語:英語  

    Coronary stenosis severity assessed by 256-slice MDCT angiography in comparison with stress myocardial perfusion imaging
    We evaluated the feasibility of 256-slice MDCT for detecting coronary artery stenosis without beta blocker premedication, and assessed the diagnostic accuracy of MDCT for detecting myocardial ischemia by 201Tl SPECT. Fifty-three patients underwent both coronary CT angiography and stress myocardial perfusion SPECT. All coronary arteries were assessable with appropriate image quality. MDCT revealed high specificity, but only half of stenotic lesion by MDCT revealed ischemia on SPECT.

  • 診療 256列CTを用いた冠動脈狭窄度とタリウム心筋血流SPECTによる虚血との関連 (胸部の最新画像情報2012) 査読

    米澤 政人, 長尾 充展, 樋口 江

    臨床放射線   57 ( 1 )   136 - 141   2012年1月

     詳細を見る

    記述言語:英語  

    Coronary stenosis severity assessed by 256-slice MDCT angiography in comparison with stress myocardial perfusion imaging
    We evaluated the feasibility of 256-slice MDCT for detecting coronary artery stenosis without beta blocker premedication, and assessed the diagnostic accuracy of MDCT for detecting myocardial ischemia by 201Tl SPECT. Fifty-three patients underwent both coronary CT angiography and stress myocardial perfusion SPECT. All coronary arteries were assessable with appropriate image quality. MDCT revealed high specificity, but only half of stenotic lesion by MDCT revealed ischemia on SPECT.

▼全件表示

書籍等出版物

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    担当:共著 範囲:Technical Considerations for Performing Safe and Effective Balloon Pulmonary Angioplasty in Patients with Chronic Thromboembolic Pulmonary Hypertension)

    ELSEVIER  2023年7月    ISBN:9780443182075

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    山崎誘三, 鷺山幸二, 神谷武志

    2021年3月 

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  • 画像診断・放射線治療ビジュアルナーシング:MRI画像の見方(心・大血管)

    山崎誘三

    2021年1月 

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  • これだけは知っておきたい心臓・血管疾患の画像診断

    米澤政人, 山崎誘三(担当:共著)

    2021年1月 

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    記述言語:日本語   著書種別:学術書

  • ここから始める循環器疾患のCT・MRI

    長尾充展, 山崎誘三, 神谷武志, 藪内英剛(担当:共著)

    2020年4月 

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    記述言語:日本語  

講演・口頭発表等

  • Dynamic chest radiography for pulmonary vascular diseases 招待

    Yuzo Yamasaki

    Joint meeting of The 15th Meeting of the Japanese Society of Pulmonary Functional Imaging and The 11th International Workshop on Pulmonary Functional Imaging  2024年8月 

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    開催年月日: 2024年8月

    記述言語:英語   会議種別:シンポジウム・ワークショップ パネル(指名)  

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    山崎誘三

    第9回日本肺高血圧・肺循環学会学術集会  2024年8月 

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    開催年月日: 2024年8月

    会議種別:シンポジウム・ワークショップ パネル(指名)  

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  • Evaluation of pulmonary regurgitation using dynamic chest radiography in adult congenital heart disease

    Yuzo Yamasaki

    The 83rd Annual Meeting of the Japan Radiological Society  2024年4月 

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    開催年月日: 2024年4月

    会議種別:口頭発表(一般)  

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  • 最新画像診断手法を用いたCTEPH 診断法、評価法の開発 招待

    山崎誘三

    第8回日本肺高血圧・肺循環学会学術集会  2023年6月 

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    開催年月日: 2023年6月

    記述言語:その他  

    国名:その他  

  • 最新画像診断手法を用いたCTEPH 診断法、評価法の開発 招待

    山崎誘三

    第8回日本肺高血圧・肺循環学会学術集会  2023年6月 

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    開催年月日: 2023年6月

    会議種別:口頭発表(招待・特別)  

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  • 単純X線診断のパラダイムシフト:胸部X線動態撮影を用いた肺循環評価 招待

    山崎誘三

    第82回日本医学放射線学会総会  2023年4月 

     詳細を見る

    開催年月日: 2023年4月

    記述言語:その他  

    国名:その他  

  • 肺循環の画像診断 招待

    山崎誘三

    第82回日本医学放射線学会総会  2023年4月 

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    開催年月日: 2023年4月

    記述言語:その他  

    国名:その他  

    Diagnostic imaging of pulmonary circulation

  • 単純X線診断のパラダイムシフト:胸部X線動態撮影を用いた肺循環評価 招待

    山崎誘三

    第82回日本医学放射線学会総会  2023年4月 

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    開催年月日: 2023年4月

    会議種別:公開講演,セミナー,チュートリアル,講習,講義等  

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  • 肺循環の画像診断 招待

    山崎誘三

    第82回日本医学放射線学会総会  2023年4月 

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    開催年月日: 2023年4月

    会議種別:口頭発表(招待・特別)  

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  • マルチモダリティ時代のCTEPH画像診断update 招待

    山崎誘三

    第43回せとうち心臓CT・MRI勉強会  2023年4月 

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    開催年月日: 2023年4月

    記述言語:その他  

    国名:その他  

  • マルチモダリティ時代のCTEPH画像診断update 招待

    山崎誘三

    第43回せとうち心臓CT・MRI勉強会  2023年4月 

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    開催年月日: 2023年4月

    会議種別:口頭発表(招待・特別)  

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  • Dynamic chest radiography for chronic thromboembolic pulmonary hypertension

    Yuzo Yamasaki, Kohtaro Abe, Kazuya Hosokawa

    第87回日本循環器学会学術集会  2023年3月 

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    開催年月日: 2023年3月

    記述言語:英語  

    国名:その他  

  • Right Ventricular Myocardial Strain Derived from Cardiac Magnetic Resonance Imaging and Positron Emission Tomography

    M Kawakubo, Y Yamasaki, M Nagao, K Abe, K Hosokawa, H Nagata, K Yamamura, D Toyomura, A Yamamoto, H Arai, T Kadokami

    第87回日本循環器学会学術集会  2023年3月 

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    開催年月日: 2023年3月

    記述言語:その他  

    国名:その他  

  • Dynamic chest radiography for chronic thromboembolic pulmonary hypertension

    Yuzo Yamasaki, Kohtaro Abe, Kazuya Hosokawa

    第87回日本循環器学会学術集会  2023年3月 

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    開催年月日: 2023年3月

    記述言語:英語   会議種別:シンポジウム・ワークショップ パネル(公募)  

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  • Right Ventricular Myocardial Strain Derived from Cardiac Magnetic Resonance Imaging and Positron Emission Tomography

    M Kawakubo, Y Yamasaki, M Nagao, K Abe, K Hosokawa, H Nagata, K Yamamura, D Toyomura, A Yamamoto, H Arai, T Kadokami

    第87回日本循環器学会学術集会  2023年3月 

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    開催年月日: 2023年3月

    会議種別:シンポジウム・ワークショップ パネル(公募)  

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  • Added value of dynamic chest radiography for pulmonary embolism diagnosis

    Yuzo Yamasaki, Takeshi Kamitani, Koji Sagiyama, Takuya Hino, Megumi Kisanuki, Kohtaro Abe, Kazuya Hosokawa, Hidetake Yabuuchi, Kousei Ishigami

    European Congress of Radiology 2023 

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    開催年月日: 2023年3月

    記述言語:その他  

    国名:その他  

  • Added value of dynamic chest radiography for pulmonary embolism diagnosis

    Yuzo Yamasaki, Takeshi Kamitani, Koji Sagiyama, Takuya Hino, Megumi Kisanuki, Kohtaro Abe, Kazuya Hosokawa, Hidetake Yabuuchi, Kousei Ishigami

    European Congress of Radiology 2023 

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    開催年月日: 2023年3月

    会議種別:ポスター発表  

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  • Dynamic chest radiography for pulmonary vascular diseases: clinical applications and correlation with other imaging modalities

    Yuzo Yamasaki

    RSNA2022: 106th annual meeting of Radiological Society of North America 

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    開催年月日: 2022年11月 - 2022年12月

    記述言語:英語  

    国名:その他  

  • Dynamic chest radiography for pulmonary vascular diseases: clinical applications and correlation with other imaging modalities

    Yuzo Yamasaki

    RSNA2022: 106th annual meeting of Radiological Society of North America 

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    開催年月日: 2022年11月 - 2022年12月

    記述言語:英語   会議種別:ポスター発表  

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  • 日常診療で見かける肺血管・大血管の正常破格と先天奇形 招待

    山崎誘三

    第58回日本医学放射線学会秋季臨床大会 

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    開催年月日: 2022年9月

    記述言語:その他  

    国名:その他  

  • 日常診療で見かける肺血管・大血管の正常破格と先天奇形 招待

    山崎誘三

    第58回日本医学放射線学会秋季臨床大会 

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    開催年月日: 2022年9月

    会議種別:口頭発表(招待・特別)  

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  • 胸部X線動態撮影が慢性血栓塞栓性肺高血圧症の鑑別に有用であった二例

    木佐貫恵, 山崎誘三

    第95回日本心臓血管放射線研究会  2022年7月 

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    開催年月日: 2022年7月

    記述言語:その他  

    国名:その他  

  • 胸部X線動態撮影が慢性血栓塞栓性肺高血圧症の鑑別に有用であった二例

    木佐貫恵, 山崎誘三

    第95回日本心臓血管放射線研究会  2022年7月 

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    開催年月日: 2022年7月

    会議種別:口頭発表(一般)  

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  • 肺循環評価における動態解析の臨床応用 - 肺塞栓症を中心に - 招待

    山崎誘三

    第4回X線動態画像セミナー  2022年6月 

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    開催年月日: 2022年6月

    記述言語:その他  

    国名:その他  

  • 肺循環評価における動態解析の臨床応用 - 肺塞栓症を中心に - 招待

    山崎誘三

    第4回X線動態画像セミナー  2022年6月 

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    開催年月日: 2022年6月

    会議種別:口頭発表(招待・特別)  

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  • マルチモダリティ時代のCTEPH 画像診断 招待

    山崎誘三

    CTEPH clinical conference in Kyushu  2022年6月 

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    開催年月日: 2022年6月

    記述言語:その他  

    国名:その他  

  • マルチモダリティ時代のCTEPH 画像診断 招待

    山崎誘三

    CTEPH clinical conference in Kyushu  2022年6月 

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    開催年月日: 2022年6月

    会議種別:口頭発表(招待・特別)  

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  • 圧縮センシングと収縮期撮像による高分解能T1mappingを用いた右室心筋解析の検討

    西懸 大介, 山崎 誘三, 山村 健一郎, 舩津 亮平, 和田 達弘, 大賀 正浩, 小林 幸次, 加藤 豊幸, 石神 康生

    第86回日本循環器学会学術総会  2022年3月 

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    開催年月日: 2022年3月

    記述言語:その他  

    国名:その他  

  • 心臓MRIを用いた肺高血圧症における右室リモデリング評価

    河窪正照, 山崎誘三, 阿部弘太郎, 細川和也, 長尾充展, 新井英雄, 門上俊明

    第86回日本循環器学会学術総会  2022年3月 

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    開催年月日: 2022年3月

    記述言語:その他  

    国名:その他  

  • 圧縮センシングと収縮期撮像による高分解能T1mappingを用いた右室心筋解析の検討

    西懸 大介, 山崎 誘三, 山村 健一郎, 舩津 亮平, 和田 達弘, 大賀 正浩, 小林 幸次, 加藤 豊幸, 石神 康生

    第86回日本循環器学会学術総会  2022年3月 

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    開催年月日: 2022年3月

    会議種別:口頭発表(一般)  

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  • 心臓MRIを用いた肺高血圧症における右室リモデリング評価

    河窪正照, 山崎誘三, 阿部弘太郎, 細川和也, 長尾充展, 新井英雄, 門上俊明

    第86回日本循環器学会学術総会  2022年3月 

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    開催年月日: 2022年3月

    会議種別:シンポジウム・ワークショップ パネル(公募)  

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  • Amid proton transfer (APT) imaging of breast cancers: correlation with biological statuses.

    Kamitani T, Sagiyama K, Yamasaki Y, Hida T, Matsuura Y, Wada T, Yabuuchi H, Ishigami K

    European Congress of Radiology 2022 

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    開催年月日: 2022年3月

    記述言語:その他  

    国名:その他  

  • Amid proton transfer (APT) imaging of breast cancers: correlation with biological statuses.

    Kamitani T, Sagiyama K, Yamasaki Y, Hida T, Matsuura Y, Wada T, Yabuuchi H, Ishigami K

    European Congress of Radiology 2022 

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    開催年月日: 2022年3月

    会議種別:口頭発表(一般)  

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  • 胸部 X 線動態撮影による肺血流イメージング 招待

    山崎 誘三

    第13回呼吸機能イメージング研究会学術集会  2022年1月 

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    開催年月日: 2022年1月

    記述言語:その他  

    国名:その他  

  • 胸部 X 線動態撮影による肺血流イメージング 招待

    山崎 誘三

    第13回呼吸機能イメージング研究会学術集会  2022年1月 

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    開催年月日: 2022年1月

    会議種別:シンポジウム・ワークショップ パネル(指名)  

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  • 最新ガイドラインを踏まえた大血管の画像診断 招待

    山崎 誘三

    第35回JCRミッドウィンターセミナー  2022年1月 

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    開催年月日: 2022年1月

    記述言語:その他  

    国名:その他  

  • 最新ガイドラインを踏まえた大血管の画像診断 招待

    山崎 誘三

    第35回JCRミッドウィンターセミナー  2022年1月 

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    開催年月日: 2022年1月

    会議種別:口頭発表(招待・特別)  

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  • CT・MRIを用いた”右心”の評価 - なぜ?なにを?どのように? - 招待

    山崎誘三

    第21回 循環器CT・MR研究会  2021年10月 

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    開催年月日: 2021年10月

    記述言語:日本語  

    国名:その他  

  • CT・MRIを用いた”右心”の評価 - なぜ?なにを?どのように? - 招待

    山崎誘三

    第21回 循環器CT・MR研究会  2021年10月 

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    開催年月日: 2021年10月

    記述言語:日本語   会議種別:口頭発表(招待・特別)  

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  • High-resolution myocardial T1mapping with compressed sensing

    Daisuke Nishigake, Yuzo Yamasaki, Kenichiro Yamamura, Ryohei Funatsu, Tatsuhiro Wada, Masahiro Oga, Koji Kobayashi, Toyoyuki Kato

    第49回日本磁気共鳴医学会 

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    開催年月日: 2021年9月

    記述言語:その他  

    国名:その他  

  • Evaluation of Lung Perfusion by Dynamic Chest Radiography in Chronic Thromboembolic Pulmonary Hypertension: Comparison with Lung Perfusion Scintigraphy

    Yuzo Yamasaki, Takeshi Kamitani, Koji Sagiyama, Tomoyuki Hida, Yuko Matsuura, Yoshiyuki Kitamura, Kohtaro Abe, Kazuya Hosokawa, Hidetake Yabuuchi, Kousei Ishigami

    第80回日本医学放射線学会総会  2021年4月 

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    開催年月日: 2021年4月

    記述言語:その他  

    国名:その他  

    Evaluation of Lung Perfusion by Dynamic Chest Radiography in Chronic Thromboembolic Pulmonary Hypertension: Comparison with Lung Perfusion Scintigraphy

  • Detection of pulmonary arterial hypertension using gravity-dependent redistribution of lung perfusion in dynamic chest radiography 国際会議

    Yuzo Yamasaki, Takeshi Kamitani, Koji Sagiyama, Tomoyuki Hida, Yuko Matsuura, Kohtaro Abe, Kazuya Hosokawa, Hidetake Yabuuchi, Kousei Ishigami

    European Congress of Radiology  2021年3月 

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    開催年月日: 2021年3月

    記述言語:日本語  

    開催地:online   国名:日本国  

  • 肺高血圧症の画像診断update 招待

    山崎誘三

    AIMS cardiac imaging  2020年12月 

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    開催年月日: 2020年12月

    記述言語:日本語   会議種別:口頭発表(一般)  

    開催地:webinar   国名:日本国  

  • What should you write in a report of cardiac MRI? 招待

    Yuzo Yamasaki

    The 79th annual meeting of the Japan Radiological Society  2020年5月 

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    開催年月日: 2020年5月 - 2020年6月

    記述言語:英語   会議種別:口頭発表(一般)  

    開催地:webinar   国名:日本国  

  • ハイエンド機種を用いた心臓 CT の臨床応用<Congenital heart disease> 招待

    山崎誘三

    第19回循環器MDCT研究会  2019年11月 

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    開催年月日: 2019年11月

    記述言語:日本語   会議種別:口頭発表(一般)  

    開催地:東京都   国名:日本国  

  • 実臨床における有用性の報告・ディスカッション(5):肺血流 招待

    山崎誘三 樋田知之 神谷武志

    第2回X線動態画像セミナー  2019年11月 

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    開催年月日: 2019年11月

    記述言語:日本語   会議種別:口頭発表(一般)  

    開催地:東京都   国名:日本国  

  • Balloon pulmonary angioplasty improves right atrial reservoir function in patients with chronic thromboembolic pulmonary hypertension 国際会議

    Yuzo Yamasaki, Takeshi Kamitani, Koji Sagiyama, Tomoyuki Hida, Yuko Matsuura, Yuriko Murayama, Kazuya Hosokawa, Kohtaro Abe, Hidetake Yabuuchi

    The European Society of Cardiovascular Radiology  2020年12月 

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    開催年月日: 2019年10月

    記述言語:英語   会議種別:口頭発表(一般)  

    開催地:Antwerp   国名:ベルギー王国  

  • CT・MRIの循環器疾患への応用 招待

    山崎誘三

    筑後有明ct.mriセミナー  2019年7月 

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    開催年月日: 2019年7月

    記述言語:日本語   会議種別:口頭発表(招待・特別)  

    開催地:久留米市   国名:日本国  

  • 慢性血栓塞栓性肺高血圧に対するバルーン肺動脈形成術は右心房機能を改善する

    山崎誘三, 神谷武志, 鷺山幸二, 樋田知之, 松浦由布子, 村山佑里子, 阿部弘太郎, 細川和也, 河窪正照, 舩津亮平, 藪内英剛

    第89回日本心臓血管放射線研究会  2019年7月 

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    開催年月日: 2019年7月

    記述言語:その他  

    国名:その他  

  • 慢性血栓塞栓性肺高血圧に対するバルーン肺動脈形成術は右心房機能を改善する

    山崎誘三, 神谷武志, 鷺山幸二, 樋田知之, 松浦由布子, 村山佑里子, 阿部弘太郎, 細川和也, 河窪正照, 舩津亮平, 藪内英剛

    第89回日本心臓血管放射線研究会  2019年7月 

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    開催年月日: 2019年7月

    会議種別:口頭発表(一般)  

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  • Patient-related factors determining detectability of coronary arteries in 320-row CT angiography in infants with complex congenital heart disease

    Yamasaki Y, Kamitani T, Sagiyama K, Hino T, Nagata H, Yabuuchi H, Honda H

    European Congress of Radiology 2018  2019年7月 

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    開催年月日: 2019年7月

    記述言語:英語  

    国名:日本国  

  • Performance of Preoperative N-Staging for Non-Small Cell Lung Cancer Patients: Comparison Among Short Inversion Time Inversion Recovery (STIR), Diffusion-Weighted Imaging (DWI), and FDG-PET/CT in a Multi-Center Study

    Yamasaki Y, Yabuuchi H, Ohno Y, Iwasawa T, Honda N, Sasaki M, Abe K, Kamitani T, Baba S, Sagiyama K, Matsuura Y, Hino T, Tsutsui S, Honda H

    104rd Scientific Assembly and Annual Meeting of Radiological Society of North America 2018  2019年7月 

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    開催年月日: 2019年7月

    記述言語:英語  

    国名:日本国  

  • Forward projected model-based iterative reconstruction solution for 320-row CT angiography improves image quality and reduces radiation exposure in infants with complex congenial heart disease.

    Yamasaki Y, Kamitani T, Sagiyama K, Matsuura Y, Hino T, Tsutsui S, Yabuuchi H, Honda H

    104rd Scientific Assembly and Annual Meeting of Radiological Society of North America 2018  2019年7月 

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    開催年月日: 2019年7月

    記述言語:英語  

    国名:日本国  

  • 放射線技師に役立つ心臓CTのはなし 招待

    山崎誘三

    第75回CT検討会  2019年3月 

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    開催年月日: 2019年3月

    記述言語:日本語   会議種別:口頭発表(招待・特別)  

    開催地:福岡市   国名:日本国  

  • Quantitative MR Imaging in Pulmonary Hypertension: How to Evaluate the Hemodynamics and Treatment Effect 国際会議

    Yuzo Yamasaki, Satoshi Kawanami, Takeshi Kamitani, Koji Sagiyama, Seitaro Shin, Koshin Horimoto, Kohtaro Abe, Hidetake Yabuuchi, Hiroshi Honda

    102nd Scientific Assembly and Annual Meeting of Radiological Society of North America 2016  2016年12月 

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    開催年月日: 2016年12月

    記述言語:英語   会議種別:口頭発表(一般)  

    開催地:Chicago   国名:アメリカ合衆国  

  • Cardiovascular CT and MR imaging in adult congenital heart disease: A practical approach to the current state of the art 国際会議

    Yuzo Yamasaki, Satoshi Kawanami, Takeshi Kamitani, Koji Sagiyama, Seitaro Shin, Kenichiro Yamamura, Ichiro Sakamoto, Hidetake Yabuuchi, Hiroshi Honda

    102nd Scientific Assembly and Annual Meeting of Radiological Society of North America 2016  2016年12月 

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    開催年月日: 2016年12月

    記述言語:日本語   会議種別:口頭発表(一般)  

    開催地:Chicago   国名:アメリカ合衆国  

  • 冠動脈CTのfirst step-撮像の理解から読影の実際まで 招待

    山崎誘三

    福岡県診療放射線技師CT検討会  2016年8月 

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    開催年月日: 2016年8月

    記述言語:日本語   会議種別:口頭発表(招待・特別)  

    開催地:福岡市   国名:日本国  

  • 慢性血栓塞栓性肺高血圧へのバルーン肺動脈形成術は心室間同期不全、左室充満障害を改善する: MRIでの評価

    山崎誘三, 長尾充展, 川波 哲, 神谷武志, 鷺山幸二, 田中祐子, 山之内寅彦, 細川和也, 阿部弘太郎, 本田 浩

    第26回日本心血管画像動態学会  2016年1月 

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    開催年月日: 2016年1月

    記述言語:その他  

    国名:その他  

  • Clinical Impact of Left ventricular Eccentricity Index Using Cardiac Cine MRI for Assessment of Right Ventricular Hemodynamics in Adult Congenital Heart Disease

    Yamasaki Yuzo

    International Society for Magnetic Resonance in Medicine 23rd annual Meeting & Exhibition 

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    開催年月日: 2015年5月 - 2015年6月

    記述言語:その他  

    国名:その他  

  • Quantification of Myocardial Velocity Using 256-slice Cardiac CT and Motion Coherence and Functional Analysis: Mechanical Characteristics of Peri-infarct and Myocardial Infarction.

    Yuzo Yamasaki, et al.

    98th Scientific Assembly and annual Meeting of Radiological Society of North America 

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    開催年月日: 2012年11月

    記述言語:その他  

    国名:その他  

  • Subendocardial Systolic Hypoperfusion in Stenotic Coronary Territories: Demonstration by 256-slice MSCT Coronary Angiography

    Yuzo Yamasaki, et al.

    98th Scientific Assembly and annual Meeting of Radiological Society of North America 

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    開催年月日: 2012年11月

    記述言語:その他  

    国名:その他  

  • 画像診断 今月の症例 脳梗塞

    川村 暢子, 武藤 絵美, 山崎 誘三, チョン・ピンフィー, 吉良 龍太郎, 小田切 邦雄

    小児科臨床  2013年6月 

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    記述言語:日本語  

    国名:日本国  

    今月の症例 画像診断 脳梗塞

  • 個別化治療時代の肺癌画像診断 化学療法後の治療効果判定と予後予測

    藪内 英剛, 松尾 芳雄, 川波 哲, 神谷 武志, 米澤 政人, 山崎 誘三, 長尾 充展, 本田 浩

    画像診断  2014年1月 

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    記述言語:その他  

    国名:日本国  

  • 特集 知っておきたい循環器疾患のCT・MRI(1)-心臓・頸部血管疾患Case Review- 心臓 心筋炎

    長尾 充展, 川波 哲, 山崎 誘三, 米澤 政人, 神谷 武志, 山之内 寅彦, 本田 浩, 藪内 英剛

    画像診断  2015年6月 

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    記述言語:その他  

    国名:日本国  

  • 特集 知っておきたい循環器疾患のCT・MRI(1)-心臓・頸部血管疾患Case Review- 心臓 Fontan循環

    長尾 充展, 川波 哲, 山崎 誘三, 米澤 政人, 神谷 武志, 山之内 寅彦, 本田 浩, 藪内 英剛

    画像診断  2015年6月 

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    記述言語:その他  

    国名:日本国  

  • 特集 主要肺疾患の重要な非典型画像所見 肺水腫

    藪内 英剛, 川波 哲, 神谷 武志, 山崎 誘三, 山之内 寅彦, 長尾 充展, 鷺山 幸二, 田中 祐子, 本田 浩

    画像診断  2015年10月 

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    記述言語:その他  

    国名:日本国  

  • 特集 胸部の最新画像情報2017 総説 縦隔区分と機能画像による縦隔腫瘍の鑑別診断

    藪内 英剛, 川波 哲, 神谷 武志, 鷺山 幸二, 山崎 誘三, 馬場 眞吾, 亀井 俊佑, 本田 浩

    臨床放射線  2017年1月 

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    記述言語:日本語  

    国名:日本国  

  • 低管電圧撮影と新たなスキャンタイミング決定法による320列冠動脈CT検査 造影剤低減効果の検討

    白坂 崇, 長尾 充展, 山崎 誘三, 小島 宰, 下宮 大和, 近藤 雅敏, 吉川 英樹

    日本放射線技術学会総会学術大会予稿集  2018年3月 

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    記述言語:日本語  

    国名:日本国  

  • ACHDのCT/MRI : 形態から機能診断へ—Morphofunctional diagnosis of adult congenital heart disease using CT and MRI—特集 激増する成人先天性心疾患(ACHD) : 求められる循環器内科医の覚悟

    長尾 充展, 山崎 誘三

    循環器内科 = Cardioangiology / 循環器内科編集委員会 編  2018年5月 

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    記述言語:日本語  

    国名:日本国  

  • 特集 Precision Medicine時代の肺癌の画像診断 肺癌薬剤療法後の効果判定

    藪内 英剛, 神谷 武志, 鷺山 幸二, 山崎 誘三, 松浦 由布子, 日野 卓也, 筒井 聡一郎, 本田 浩

    画像診断  2018年10月 

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    記述言語:その他  

    国名:日本国  

  • 特集 肺に淡い陰影が広がっていたらどう診断するか? 循環障害を考えてみるとき

    神谷 武志, 藪内 英剛, 鷺山 幸二, 山崎 誘三, 松浦 由布子, 日野 卓也, 筒井 聡一郎, 本田 浩

    画像診断  2019年3月 

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    記述言語:その他  

    国名:日本国  

  • 肺癌薬剤療法の効果判定の注意点

    藪内 英剛, 神谷 武志, 鷺山 幸二, 山崎 誘三, 樋田 知之, 松浦 由布子, 石神 康生

    肺癌  2020年12月 

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    記述言語:日本語  

    国名:日本国  

    肺癌の薬剤療法では個別化医療が進んでおり,遺伝子解析により薬剤の選択は細分化しているが,効果判定において画像診断は重要な役割を果たしている.Response Evaluation Criteria in Solid Tumors(RECIST)v1.1は,簡便で客観性の高い判定方法として,一般臨床では特に進行(progressive disease:PD)の判断根拠として,臨床試験では第三者による客観的評価として広く用いられているが,主にCTやMRIによる腫瘍の最大径のみで判定されるため,様々な欠点を含んでいる.個別化医療の時代ではRECIST v1.1による効果判定の限界も明らかになってきており,機能画像による効果判定や予後予測の研究が進んでいる.本稿では,RECIST v1.1に基づいた効果判定の注意点や問題点,近年の機能画像による効果判定の知見,免疫チェックポイント阻害薬の効果判定の留意点を概説する.

  • 「肺⾎流イメージングの臨床応⽤」 招待

    山崎 誘三

    第3回X線動態画像セミナー  2021年6月 

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    記述言語:その他  

    国名:その他  

  • Cardiac Magnetic Resonance Feature Trackingによるファロー四徴症術後の右房機能評価

    豊村 大亮, 長友 雄作, 河窪 正照, 山崎 誘三, 福岡 将治, 鵜池 清, 平田 悠一郎, 山村 健一郎, 坂本 一郎, 石神 康生, 大賀 正一

    日本小児循環器学会総会・学術集会抄録集  2021年7月 

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    記述言語:日本語  

    国名:日本国  

  • ファブリー病における心MRI所見 招待

    山崎 誘三

    九州ファブリー病Webセミナー  2021年7月 

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    記述言語:その他  

    国名:その他  

  • 「二層検出器CTとX線動態撮影が生み出す 次世代イメージング:胸部・心大血管領域」 招待

    山崎 誘三

    城北放射線セミナー  2021年7月 

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    記述言語:その他  

    国名:その他  

  • 特集 地力が伸ばせる 心臓・大血管の画像診断−日常臨床でよく遭遇する循環器疾患− 慢性血栓塞栓性肺高血圧症

    山崎 誘三, 北村 宜之, 石神 康生

    臨床画像  2021年9月 

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    記述言語:その他  

    国名:日本国  

  • Withコロナ時代の肺炎の画像診断—特集 Withコロナ時代の肺炎診療 ; 肺炎の診断

    藪内 英剛, 神谷 武志, 鷺山 幸二, 山崎 誘三, 樋田 知之, 松浦 由布子, 石神 康生

    臨牀と研究 = The Japanese journal of clinical and experimental medicine  2021年11月 

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    記述言語:日本語  

    国名:日本国  

  • 最新ガイドラインを踏まえた大血管の画像診断 -CT画像を中心に- 招待

    山崎 誘三

    第78回筑後 有明CT・MRIセミナー  2021年11月 

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    記述言語:その他  

    国名:その他  

  • 冠動脈CTの基本と読影医が実は知らないこと ~目指せ、ラジエーションハウス!~ 招待

    山崎 誘三

    福岡地区診療放射線技師会 2021 年度 第 2 回福岡地区 勉強会  2022年2月 

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    記述言語:その他  

    国名:その他  

  • 右心室評価のための圧縮センシングと収縮期取得による高解像度T1マッピング

    西懸大介, 山崎誘三, 山村健一郎

    日本循環器学会学術集会(Web)  2022年3月 

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    記述言語:英語  

    国名:日本国  

    右心室評価のためのCompressed Sensingと収縮期撮影による高解像度T1 Mapping(High-resolution T1 Mapping with Compressed Sensing and Systolic Acquisition for the Evaluation of Right Ventricle)

  • 【生検 最近の潮流】軟部腫瘍診療における生検と画像診断の役割

    鷺山 幸二, 神谷 武志, 山崎 誘三, 樋田 知之, 松浦 由布子, 藪内 英剛, 牛島 泰宏, 石神 康生

    日本インターベンショナルラジオロジー学会雑誌  2022年3月 

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    記述言語:日本語  

    国名:日本国  

    軟部腫瘍の発生部位は四肢をはじめ全身に及び、皮下や筋間、筋肉、後腹膜など深度も様々である。良性腫瘍、中間悪性腫瘍、希少癌の悪性軟部腫瘍に分けられる。診断は病理診断により確定されるが、不適切な生検手技は患者の予後を悪化させる。軟部腫瘍の病理診断と根治的治療の手術に関して簡単に述べ、現在大きな問題になっている無計画切除に言及した。各生検技法の概要と注意点を述べ、その補助となる画像モダリティーの特徴を解説した。画像ガイド下針生検が奏効した症例を紹介した。

  • 胸部X線動態撮影における肺野血流信号の分布について:立位および仰臥位の比較

    樋田知之, 山崎誘三

    第81回日本医学放射線学会総会  2022年4月 

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    記述言語:その他  

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  • 仮想単色X線画像を用いた乳癌術前評価

    松浦由布子, 山崎誘三

    第81回日本医学放射線学会総会  2022年4月 

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  • Dynamic Chest Radiography: Innovation in CTEPH imaging 招待

    山崎誘三

    第70回日本心臓病学会学術集会  2022年9月 

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  • 胸部X線動態撮影:急速に世界に普及し始めた新たな肺血流イメージング 招待

    山崎 誘三

    日本心血管画像動態学会  2023年1月 

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  • 単純X線診断のパラダイムシフト:胸部X線動態撮影を用いた肺循環評価 招待

    山崎 誘三

    日本心臓血管放射線研究会  2023年1月 

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    記述言語:その他  

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  • 造影剤投与4分後の心電図非同期CT撮影による心筋ECV評価

    小島 宰, 山崎 誘三, 西懸 大介, 白坂 崇, 藪内 英剛, 加藤 豊幸, 石神 康生

    日本放射線技術学会総会学術大会予稿集  2023年3月 

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    記述言語:日本語  

    国名:日本国  

  • Dynamic chest radiography for pulmonary vascular diseases: clinical applications and correlation with other imaging modalities 招待

    Yuzo Yamasaki

    Global DDR Clinical Meeting  2023年4月 

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    記述言語:英語  

    国名:その他  

  • 胸部X線動態撮影による肺血流イメージング 招待

    山崎誘三

    第229回 筑後地区レントゲンアーベント特別講演会  2023年6月 

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  • Dynamic Chest Radiography for Pulmonary Vascular Diseases:Clinical Applications and Correlation with Other Imaging Modalities 招待

    山崎誘三

    第5回Ⅹ線動態画像セミナー  2023年6月 

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  • 胸部X線動態撮影による慢性血栓塞栓性肺高血圧症の肺血流評価:肺血流シンチグラフィとの比較

    木佐貫恵, 山崎誘三, 他

    第97回日本心臓血管放射線研究会  2023年7月 

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  • 胸部X線動態撮影による肺血流イメージング 招待

    山崎誘三

    第83回筑後 有明CT・MRIセミナー  2023年7月 

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  • 単純X線診断のパラダイムシフト 胸部X線動態撮影を用いた肺循環評価

    山崎 誘三

    断層映像研究会雑誌  2023年9月 

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    記述言語:日本語  

    国名:日本国  

  • 胸部単純X線写真 -肺血流イメージングの活用を含めて- 招待

    山崎誘三

    第29回成人先天性心疾患セミナー  2023年10月 

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  • 単純X線診断のパラダイムシフト:胸部X線動態撮影を用いた肺循環評価 招待

    山崎誘三

    第51回断層映像研究会  2023年10月 

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    記述言語:その他  

    国名:その他  

  • Dynamic Chest Radiography for Pulmonary Diseases 招待

    山崎誘三

    北部九州画像診断フォーラム  2023年10月 

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    国名:その他  

  • 肺動脈血栓症・塞栓症

    山崎誘三, 神谷武志, 鷺山幸二, 日野卓也, 田畑公祐, 木佐貫恵, 藪内英剛, 石神康生

    画像診断  2023年12月 

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    国名:日本国  

    Pulmonary Embolism

  • 胸部X線動態撮影の臨床応用と今後の課題 招待

    山崎誘三

    福岡地区放射線技師会勉強会  2024年2月 

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  • 顎関節に生じたピロリン酸カルシウム結晶沈着症の1例

    菊野 亮栄, 松浦 由布子, 鷺山 幸二, 神谷 武志, 樋田 知之, 山崎 誘三, 石神 康生, 松尾 美央子, 山元 英崇, 藪内 英剛

    Japanese Journal of Radiology  2023年2月  (公社)日本医学放射線学会

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    記述言語:日本語  

  • 造影剤投与4分後の心電図非同期CT撮影による心筋ECV評価

    小島 宰, 山崎 誘三, 西懸 大介, 白坂 崇, 藪内 英剛, 加藤 豊幸, 石神 康生

    日本放射線技術学会総会学術大会予稿集  2023年3月  (公社)日本放射線技術学会

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    記述言語:日本語  

  • 胸部単純X線写真 -肺血流イメージングの活用を含めて- 招待

    山崎誘三

    第29回成人先天性心疾患セミナー  2023年10月 

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    会議種別:公開講演,セミナー,チュートリアル,講習,講義等  

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  • 胸部動態撮影におけるsynthetic static imageの有用性の検討

    溝口 範子, 山崎 誘三, 西懸 大介, 濱崎 洋志, 神谷 武志, 鷺山 幸二, 日野 卓也, 高倉 健汰, 高木 達也, 加藤 豊幸

    JART: 日本診療放射線技師会誌  2023年9月  (公社)日本診療放射線技師会

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    記述言語:日本語  

  • 胸部X線撮影におけるone-shot dual-energy subtractionとtwo-shot dual-energy subtractionによる視認性の比較

    神崎 祐依, 寳部 真也, 倉本 卓, 柴山 祐亮, 山崎 誘三, 吉川 英樹, 加藤 豊幸

    日本放射線技術学会総会学術大会予稿集  2024年3月  (公社)日本放射線技術学会

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    記述言語:日本語  

  • 胸部X線動態撮影:急速に世界に普及し始めた新たな肺血流イメージング 招待

    山崎 誘三

    日本心血管画像動態学会  2023年1月 

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    会議種別:口頭発表(招待・特別)  

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  • 胸部X線動態撮影の臨床応用と今後の課題 招待

    山崎誘三

    福岡地区放射線技師会勉強会  2024年2月 

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    会議種別:公開講演,セミナー,チュートリアル,講習,講義等  

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  • 胸部X線動態撮影による肺血流イメージング 招待

    山崎誘三

    第229回 筑後地区レントゲンアーベント特別講演会  2023年6月 

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    会議種別:口頭発表(招待・特別)  

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  • 胸部X線動態撮影による肺血流イメージング 招待

    山崎誘三

    第83回筑後 有明CT・MRIセミナー  2023年7月 

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    会議種別:口頭発表(招待・特別)  

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  • 胸部X線動態撮影による慢性血栓塞栓性肺高血圧症の肺血流評価:肺血流シンチグラフィとの比較

    木佐貫恵, 山崎誘三, 他

    第97回日本心臓血管放射線研究会  2023年7月 

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    会議種別:口頭発表(一般)  

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  • 胸部X線動態撮影における肺野血流信号の分布について:立位および仰臥位の比較

    樋田知之, 山崎誘三

    第81回日本医学放射線学会総会  2022年4月 

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  • 胸部X線動態撮影における肺野血流信号の分布について 立位および仰臥位の比較(Distribution of Lung Perfusion Signals Derived from Dynamic Chest Radiography: A Comparison between Standing and Supine Positions)

    Hida Tomoyuki, Yamasaki Yuzo, Matsuura Yuko, Sagiyama Koji, Kamitani Takeshi, Yabuuchi Hidetake, Ishigami Kousei

    日本医学放射線学会学術集会抄録集  2022年3月  (公社)日本医学放射線学会

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    記述言語:英語  

  • 胸部X線動態撮影で塞栓術前後の血流変化を評価した肺動静脈奇形の3例

    樋田 知之, 山崎 誘三, 松浦 由布子, 鷺山 幸二, 神谷 武志, 和田 憲明, 牛島 泰宏, 石神 康生, 藪内 英剛

    Japanese Journal of Radiology  2023年2月  (公社)日本医学放射線学会

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    記述言語:日本語  

  • 胸部X線動態撮影での肺血流分布基準値の確立

    溝口 範子, 山崎 誘三, 西懸 大介, 濱崎 洋志, 神谷 武志, 石神 康生, 加藤 豊幸

    日本放射線技術学会総会学術大会予稿集  2024年3月  (公社)日本放射線技術学会

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    記述言語:日本語  

  • 肺高血圧症の診断と治療における放射線診療の役割 心臓MRIを用いた肺高血圧症における右室リモデリング評価

    河窪 正照, 山崎 誘三, 阿部 弘太郎, 細川 和也, 長尾 充展, 新井 英雄, 門上 俊明

    日本循環器学会学術集会抄録集  2022年3月  (一社)日本循環器学会

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    記述言語:日本語  

  • 肺血管疾患に対する胸部X線動態撮影 臨床応用および他の画像モダリティとの相関性(Dynamic chest radiography for pulmonary vascular diseases: clinical applications and correlation with other imaging modalities)

    山崎 誘三

    INNERVISION  2023年9月  (株)インナービジョン

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    記述言語:日本語  

  • 肺循環評価における動態解析の臨床応用 肺塞栓症を中心に

    山崎 誘三

    INNERVISION  2022年9月  (株)インナービジョン

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    記述言語:日本語  

  • 肺循環の画像診断(Diagnostic Imaging of Pulmonary Circulation)

    Yamasaki Yuzo

    日本医学放射線学会学術集会抄録集  2023年3月  (公社)日本医学放射線学会

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    記述言語:英語  

  • 粗大な骨化を伴った縦隔滑膜肉腫の1例

    西原 新也, 松浦 由布子, 樋田 知之, 鷺山 幸二, 山崎 誘三, 神谷 武志, 石神 康生, 竹中 朋祐, 河野 幹寛, 孝橋 賢一

    Japanese Journal of Radiology  2024年2月  (公社)日本医学放射線学会

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    記述言語:日本語  

  • 画像診断・シミュレーション医学によるテクノロジーとその実用:~病態生理の解明から治療戦略のアセスメントに至るまで~ 新しい画像診断技術のデジタルX線動画撮影(DDR)はファロー四徴症術後の肺動脈狭窄のスクリーニング検査として有用である

    豊村 大亮, 永田 弾, 山崎 誘三, 長友 雄作, 平田 悠一郎, 福岡 将治, 山村 健一郎, 石神 康生, 大賀 正一

    日本小児循環器学会総会・学術集会抄録集  2022年7月  (NPO)日本小児循環器学会

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    記述言語:日本語  

  • 最新画像診断手法を用いたCTEPH診断法、評価法の開発

    山崎 誘三

    日本肺高血圧・肺循環学会学術集会抄録集  2023年6月  日本肺高血圧・肺循環学会

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    記述言語:日本語  

  • 日常診療で見かける肺血管、大血管の正常破格と先天奇形

    山崎 誘三

    日本医学放射線学会秋季臨床大会抄録集  2022年8月  (公社)日本医学放射線学会

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    記述言語:日本語  

  • 成人先天性心疾患における胸部X線動態撮影を用いた肺動脈逆流率の評価法の開発(Evaluation of Pulmonary Regurgitation Using Dynamic Chest Radiography in Adult Congenital Heart Disease)

    Yamasaki Yuzo, Kamitani Takeshi, Sagiyama Koji, Hino Takuya, Tabata Kosuke, Kisanuki Megumi, Toyomura Daisuke, Sakamoto Ichiro, Yabuuchi Hidetake, Ishigami Kousei

    日本医学放射線学会学術集会抄録集  2024年3月  (公社)日本医学放射線学会

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    記述言語:英語  

  • 心臓MRIの基礎知識 revisited +α 招待

    山崎誘三

    小児心臓MRI研究会  2024年3月 

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    会議種別:口頭発表(招待・特別)  

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  • 少量造影剤による低管電圧TAVI-CTにおけるDeep Learning Reconstructionの有用性

    小島 宰, 山崎 誘三, 松浦 由布子, 白坂 崇, 加藤 豊幸, 藪内 英剛, 石神 康生

    日本放射線技術学会総会学術大会予稿集  2022年3月  (公社)日本放射線技術学会

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    記述言語:日本語  

  • 小児に発生した肺硬化性肺胞上皮腫の1例

    深澤 和憲, 神谷 武志, 鷺山 幸二, 山崎 誘三, 樋田 知之, 藪内 英剛, 石神 康生, 川久保 尚徳, 田尻 達郎, 孝橋 賢一

    Japanese Journal of Radiology  2024年2月  (公社)日本医学放射線学会

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    記述言語:日本語  

  • 右心室評価のためのCompressed Sensingと収縮期撮影による高解像度T1 Mapping(High-resolution T1 Mapping with Compressed Sensing and Systolic Acquisition for the Evaluation of Right Ventricle)

    西懸 大介, 山崎 誘三, 山村 健一郎

    日本循環器学会学術集会抄録集  2022年3月  (一社)日本循環器学会

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    記述言語:英語  

  • 単純X線診断のパラダイムシフト:胸部X線動態撮影を用いた肺循環評価 招待

    山崎誘三

    第51回断層映像研究会  2023年10月 

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    会議種別:口頭発表(招待・特別)  

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  • 単純X線診断のパラダイムシフト:胸部X線動態撮影を用いた肺循環評価 招待

    山崎 誘三

    日本心臓血管放射線研究会  2023年1月 

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    会議種別:口頭発表(招待・特別)  

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  • 単純X線診断のパラダイムシフト 胸部X線動態撮影を用いた肺循環評価

    山崎 誘三

    断層映像研究会雑誌  2023年9月  断層映像研究会

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    記述言語:日本語  

  • 冠動脈CTの基本と読影医が実は知らないこと 〜目指せ、ラジエーションハウス!〜 招待

    山崎 誘三

    福岡地区診療放射線技師会 2021 年度 第 2 回福岡地区 勉強会  2022年2月 

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    会議種別:口頭発表(招待・特別)  

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  • 仮想単色X線画像を用いた乳癌術前評価(Virtual Monochromatic Spectral Computed Tomography Imaging for Preoperative Evaluation of Breast Cancer)

    Matsuura Yuko, Kamitani Takeshi, Sagiyama Koji, Yamasaki Yuzo, Hida Tomoyuki, Yabuuchi Hidetake, Ishigami Kousei, Kubo Makoto, Ueo Hiroki, Yamamoto Hidetaka

    日本医学放射線学会学術集会抄録集  2022年3月  (公社)日本医学放射線学会

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    記述言語:英語  

  • 仮想単色X線画像を用いた乳癌術前評価

    松浦由布子, 山崎誘三

    第81回日本医学放射線学会総会  2022年4月 

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  • 乳児期および小児期心筋炎診断で心臓MRIが有用であった3例

    豊村 大亮, 永田 弾, 山崎 誘三, 小林 優, 長友 雄作, 平田 悠一郎, 西山 慶, 賀来 典之, 石神 康生, 大賀 正一

    日本小児循環器学会総会・学術集会抄録集  2023年7月  (NPO)日本小児循環器学会

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    記述言語:日本語  

  • マルチモダリティを用いた右室機能評価Update 心臓MRIとPETから得られた右室心筋ストレイン(Right Ventricular Myocardial Strain Derived from Cardiac Magnetic Resonance Imaging and Positron Emission Tomography)

    河窪 正照, 山崎 誘三, 長尾 充展, 阿部 弘太郎, 細川 和也, 永田 弾, 山村 健一郎, 豊村 大亮, 山本 篤志, 新井 英雄, 門上 俊明

    日本循環器学会学術集会抄録集  2023年3月  (一社)日本循環器学会

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    記述言語:英語  

  • One-shot Dual-energy Subtractionイメージングにおける肺模擬結節の視認性の評価

    神崎 祐依, 寳部 真也, 倉本 卓, 柴山 祐亮, 山崎 誘三, 吉川 英樹, 加藤 豊幸

    日本放射線技術学会総会学術大会予稿集  2023年3月  (公社)日本放射線技術学会

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    記述言語:日本語  

  • IQFinv.を用いたDual-energy Subtractionから得られる軟部画像の画質評価の検討

    寳部 真也, 倉本 卓, 神崎 祐依, 柴山 祐亮, 山崎 誘三, 吉川 英樹, 加藤 豊幸

    日本放射線技術学会総会学術大会予稿集  2023年3月  (公社)日本放射線技術学会

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    記述言語:日本語  

  • Evaluation of Dynamic Cardiac Function Using Exercise Cardiovascular Magnetic Resonance Imaging: A Pilot Study in Japan(タイトル和訳中)

    Kisanuki Megumi, Hieda Michinari, Yoshida Keimei, Imabayashi Misaki, Toyomura Daisuke, Saito Yuya, Wada Tatsuhiro, Tokunaga Chiaki, Nishikawa Kei, Kurokawa Saki, Fukudome Yuya, Yamasaki Yuzo, Hosokawa Kazuya, Abe Kotaro, Akashi Koichi

    日本循環器学会学術集会抄録集  2024年3月  (一社)日本循環器学会

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    記述言語:英語  

  • Dynamic Chest Radiography: Innovation in CTEPH imaging 招待

    山崎誘三

    第70回日本心臓病学会学術集会  2022年9月 

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    会議種別:口頭発表(招待・特別)  

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  • Dynamic Chest Radiography is a Novel Modality to Detect Pulmonary Perfusion Defects in Patients with CTEPH(タイトル和訳中)

    Abe Kotaro, Hosokawa Kazuya, Yamasaki Yuzo

    日本循環器学会学術集会抄録集  2024年3月  (一社)日本循環器学会

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    記述言語:英語  

  • Dynamic Chest Radiography for Pulmonary Vascular Diseases:Clinical Applications and Correlation with Other Imaging Modalities 招待

    山崎誘三

    第5回Ⅹ線動態画像セミナー  2023年6月 

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    会議種別:口頭発表(招待・特別)  

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  • Dynamic chest radiography for pulmonary vascular diseases: clinical applications and correlation with other imaging modalities 招待

    Yuzo Yamasaki

    Global DDR Clinical Meeting  2023年4月 

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    記述言語:英語  

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  • Dynamic chest radiography for pulmonary diseases 招待

    Yuzo Yamasaki

    Korean Workshop on Pulmonary Functional Imaging 2024  2024年9月 

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    記述言語:英語   会議種別:口頭発表(招待・特別)  

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  • Dynamic Chest Radiography for Pulmonary Diseases 招待

    山崎誘三

    北部九州画像診断フォーラム  2023年10月 

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    会議種別:口頭発表(招待・特別)  

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  • CTEPH診療の最前線:我が国のエキスパートの集合知 胸部X線動態撮影 次世代のCTEPHイメージング

    山崎 誘三, 平出 貴裕

    日本心臓病学会学術集会抄録  2022年9月  (一社)日本心臓病学会

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    記述言語:日本語  

  • CTEPHの診断と治療における進歩 慢性血栓塞栓性肺高血圧症に対する胸部X線動態撮影(Progress in Diagnosis and Treatment of CTEPH Dynamic Chest Radiography for Chronic Thromboembolic Pulmonary Hypertension)

    Yamasaki Yuzo, Abe Kohtaro, Hosokawa Kazuya

    日本循環器学会学術集会抄録集  2023年3月  (一社)日本循環器学会

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    記述言語:英語  

  • Combined large cell neuroendocrine carcinomaの1例

    村山 佑里子, 神谷 武志, 鷺山 幸二, 山崎 誘三, 樋田 知之, 松浦 由布子, 藪内 英剛, 田川 哲三, 岡本 勇, 伊地知 佳世

    Japanese Journal of Radiology  2022年2月  (公社)日本医学放射線学会

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    記述言語:日本語  

  • Cardiac imaging: 2024 update 招待

    Yuzo Yamasaki

    Society of Advanced Medical Imaging 2024  2024年7月 

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    会議種別:口頭発表(招待・特別)  

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  • 2層式Flat Panel Detectorの上層シンチレータのみを用いて得られる画像の画質評価

    寳部 真也, 倉本 卓, 柴山 祐亮, 山崎 誘三, 吉川 英樹, 加藤 豊幸

    日本放射線技術学会総会学術大会予稿集  2022年3月  (公社)日本放射線技術学会

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    記述言語:日本語  

▼全件表示

MISC

  • 【動脈・静脈の疾患2024(上)-最新の診断・治療動向-】動脈・静脈疾患の検査 静脈疾患の検査 MR venographyの概要と進歩

    鷺山 幸二, 神谷 武志, 山崎 誘三, 日野 卓也, 石神 康生

    日本臨床   82 ( 増刊4 動脈・静脈の疾患2024(上) )   177 - 182   2024年6月   ISSN:0047-1852

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    記述言語:日本語   出版者・発行元:(株)日本臨床社  

  • 肺血管疾患の胸部X線動態撮影 臨床応用と各種画像モダリティとの相関性(Dynamic chest radiography for pulmonary vascular diseases: clinical applications and correlation with other imaging modalities)

    Yamasaki Yuzo, Kamitani Takeshi, Sagiyama Koji, Hino Takuya, Kisanuki Megumi, Tabata Kosuke, Isoda Takuro, Kitamura Yoshiyuki, Abe Kohtaro, Hosokawa Kazuya, Toyomura Daisuke, Moriyama Shohei, Kawakubo Masateru, Yabuuchi Hidetake, Ishigami Kousei

    Japanese Journal of Radiology   42 ( 2 )   126 - 144   2024年2月   ISSN:1867-1071

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    記述言語:英語   出版者・発行元:(公社)日本医学放射線学会  

  • 肺動脈血栓症・塞栓症

    山崎誘三, 神谷武志, 鷺山幸二, 日野卓也, 田畑公祐, 木佐貫恵, 藪内英剛, 石神康生

    画像診断   43 ( 12 )   2023年12月   ISSN:0285-0524

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  • 胸部X線動態撮影の臨床応用における新たな道筋と残された課題(New Path and Remaining Issues in Clinical Applications of Dynamic Chest Radiography)

    Yamasaki Yuzo

    Circulation Journal   88 ( 1 )   168 - 169   2023年12月   ISSN:1346-9843

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    記述言語:英語   出版者・発行元:(一社)日本循環器学会  

  • 【全身の血栓症・塞栓症を考える】肺動脈血栓症・塞栓症

    山崎 誘三, 神谷 武志, 鷺山 幸二, 日野 卓也, 田畑 公佑, 木佐貫 恵, 藪内 英剛, 石神 康生

    画像診断   43 ( 14 )   1379 - 1389   2023年11月   ISSN:0285-0524

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    記述言語:日本語   出版者・発行元:(株)Gakken  

    <文献概要>Point ●急性肺血栓塞栓症と慢性肺血栓塞栓症では,血管内の血栓の分布や形態が異なり,画像的に鑑別が可能である.●慢性血栓塞栓性肺高血圧症や肺腫瘍血栓性微小血管症では,CT肺動脈造影で粗大な血栓がみられないことは疾患を否定する根拠にならない.●腫瘍塞栓症は時に血栓塞栓症と鑑別困難な所見を呈し,18F-FDG-PET/CTが鑑別に有用である.

  • 【Digital Radiography Now & Future 2023 多様化するニーズに応えるDRシステムの最新動向 X線検査を支える技術の今を知り,未来を展望する】X線動画撮影システムの最新動向および将来展望 肺血流評価の臨床展開

    山崎 誘三

    INNERVISION   38 ( 12 )   29 - 32   2023年11月   ISSN:0913-8919

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    記述言語:日本語   出版者・発行元:(株)インナービジョン  

    胸部X線動態撮影(dynamic chest radiography:DCR)は,X線動画撮影システムを用いて行う最新の肺機能画像検査である。X線動画撮影システムは,パルス照射が可能なX線発生装置と大画角のフラットパネル検出器からなり,X線動画像を撮影する。この動画像を,専用のワークステーション(コニカミノルタ社製)を用いて画像解析を行うことで,「肺血流」や「肺換気」「肺面積変化」「気管・横隔膜の動き」など,さまざまな機能情報を抽出することができる。本稿では,DCRによる「肺血流」評価について,(1)簡単な原理,(2)臨床展開の最新動向,(3)将来展望に関して解説する。(著者抄録)

  • 単純X線診断のパラダイムシフト 胸部X線動態撮影を用いた肺循環評価

    山崎 誘三

    断層映像研究会雑誌   50 ( 1 )   26 - 26   2023年9月   ISSN:0914-8663 eISSN:2187-0489

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    記述言語:日本語   出版者・発行元:断層映像研究会  

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  • 【肺癌治療の新時代】診断 肺癌の画像診断

    日野 卓也, 神谷 武志, 鷺山 幸二, 山崎 誘三, 田畑 公佑, 石神 康生

    臨牀と研究   100 ( 8 )   922 - 927   2023年8月   ISSN:0021-4965

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    記述言語:日本語   出版者・発行元:大道学館出版部  

  • 【絶対苦手分野にしない 成人先天性心疾患の画像診断】Fallot四徴症

    山崎 誘三, 神谷 武志, 石神 康生

    臨床画像   39 ( 6 )   614 - 621   2023年6月   ISSN:0911-1069

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    記述言語:日本語   出版者・発行元:(株)メジカルビュー社  

    <文献概要>Fallot四徴症は,頻度の高い複雑先天性心疾患であり,日常診療で出くわす機会も多い。ほとんどが小児期に修復術を受けているが,成人期になって再手術が必要となることが多い。MRIは肺動脈弁逆流率の計測,正確な右心室容積計測が可能であり,再手術の適応評価に重要である。CTも形態評価やカテーテル治療の適応評価のために頻用されている。

  • 造影剤投与4分後の心電図非同期CT撮影による心筋ECV評価

    小島 宰, 山崎 誘三, 西懸 大介, 白坂 崇, 藪内 英剛, 加藤 豊幸, 石神 康生

    日本放射線技術学会総会学術大会予稿集   79回   281 - 281   2023年3月   ISSN:1884-7846

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    記述言語:日本語   出版者・発行元:(公社)日本放射線技術学会  

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  • 乳児期および小児期心筋炎診断で心臓MRIが有用であった3例

    豊村大亮, 永田弾, 山崎誘三, 小林優, 長友雄作, 平田悠一郎, 西山慶, 賀来典之, 賀来典之, 石神康生, 大賀正一

    日本小児循環器学会総会・学術集会(Web)   59th   [III - 04]   2023年

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    記述言語:日本語   出版者・発行元:(NPO)日本小児循環器学会  

    J-GLOBAL

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  • 胸部動態撮影におけるsynthetic static imageの有用性の検討

    溝口範子, 山崎誘三, 西懸大介, 濱崎洋志, 濱崎洋志, 神谷武志, 鷺山幸二, 日野卓也, 高倉健汰, 高木達也, 加藤豊幸

    日本診療放射線技師会誌   70 ( 10 )   1077 - 1077   2023年   ISSN:2187-2538

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    記述言語:日本語   出版者・発行元:(公社)日本診療放射線技師会  

    J-GLOBAL

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  • 胸部X線動態撮影:急速に世界に普及し始めた新たな肺血流イメージング

    山崎誘三

    日本心血管画像動態学会プログラム・抄録集   33rd   2023年

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  • 肺血管疾患に対する胸部X線動態撮影:臨床応用と他の画像診断法との相関

    山崎誘三

    Innervision   38 ( 10 )   2023年   ISSN:0913-8919

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  • 肺癌治療の新時代 診断 肺癌の画像診断

    日野卓也, 神谷武志, 鷺山幸二, 山崎誘三, 田畑公佑, 石神康生

    月刊臨床と研究   100 ( 8 )   922 - 927   2023年   ISSN:0021-4965

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    記述言語:日本語   出版者・発行元:大道学館出版部  

    CiNii Books

    CiNii Research

    J-GLOBAL

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  • 最新画像診断手法を用いたCTEPH診断法,評価法の開発

    山崎誘三

    日本肺高血圧・肺循環学会学術集会抄録集(Web)   8th   2023年

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  • 心臓磁気共鳴イメージングとポジトロンエミッショントモグラフィーから誘導した右室心筋ストレイン

    河窪正照, 山崎誘三, 長尾充展, 阿部弘太郎, 細川和也, 永田弾, 山村健一郎, 豊村大亮, 山本篤志, 新井英雄, 門上俊明

    日本循環器学会学術集会(Web)   87th   SY22 - 3   2023年

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    記述言語:英語   出版者・発行元:(一社)日本循環器学会  

    J-GLOBAL

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  • 多様化するニーズに応えるDRシステムの最新動向 4.X線動画撮影システムの最新動向および将来展望 2)肺血流評価の臨床展開

    山崎誘三

    Innervision   38 ( 12 )   2023年   ISSN:0913-8919

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  • 単純X線診断のパラダイムシフト:胸部X線動態撮影を用いた肺循環評価

    山崎誘三

    断層映像研究会雑誌(Web)   50 ( 1 )   2023年   ISSN:2187-0489

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  • 【生検 最近の潮流】軟部腫瘍診療における生検と画像診断の役割

    鷺山 幸二, 神谷 武志, 山崎 誘三, 樋田 知之, 松浦 由布子, 藪内 英剛, 牛島 泰宏, 石神 康生

    日本インターベンショナルラジオロジー学会雑誌   36 ( 2 )   119 - 125   2022年3月   ISSN:1340-4520

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    記述言語:日本語   出版者・発行元:(一社)日本インターベンショナルラジオロジー学会  

    軟部腫瘍の発生部位は四肢をはじめ全身に及び、皮下や筋間、筋肉、後腹膜など深度も様々である。良性腫瘍、中間悪性腫瘍、希少癌の悪性軟部腫瘍に分けられる。診断は病理診断により確定されるが、不適切な生検手技は患者の予後を悪化させる。軟部腫瘍の病理診断と根治的治療の手術に関して簡単に述べ、現在大きな問題になっている無計画切除に言及した。各生検技法の概要と注意点を述べ、その補助となる画像モダリティーの特徴を解説した。画像ガイド下針生検が奏効した症例を紹介した。

  • 右心室評価のための圧縮センシングと収縮期取得による高解像度T1マッピング

    西懸大介, 山崎誘三, 山村健一郎

    日本循環器学会学術集会(Web)   86回   MPJ15 - 7   2022年3月

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    記述言語:英語   出版者・発行元:(一社)日本循環器学会  

    J-GLOBAL

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  • 2層式Flat Panel Detectorの上層シンチレータのみを用いて得られる画像の画質評価

    寳部真也, 倉本卓, 柴山祐亮, 山崎誘三, 吉川英樹, 加藤豊幸

    日本放射線技術学会総会学術大会予稿集   78th   200 - 200   2022年   ISSN:1884-7846

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    記述言語:日本語   出版者・発行元:(公社)日本放射線技術学会  

    J-GLOBAL

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  • 心臓MRIを用いた肺高血圧症における右室リモデリング評価

    河窪正照, 山崎誘三, 阿部弘太郎, 細川和也, 長尾充展, 新井英雄, 門上俊明

    日本循環器学会学術集会(Web)   86th   CS1 - 5   2022年

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    記述言語:日本語   出版者・発行元:(一社)日本循環器学会  

    J-GLOBAL

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  • 軟部腫瘍診療における生検と画像診断の役割

    鷺山幸二, 神谷武志, 山崎誘三, 樋田知之, 松浦由布子, 藪内英剛, 牛島泰宏, 石神康生

    日本インターベンショナルラジオロジー学会雑誌(Web)   36 ( 2 )   2022年   ISSN:2185-6451

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  • 胸部X線動態撮影:次世代のCTEPHイメージング

    山崎誘三

    日本心臓病学会学術集会(Web)   70th   S15 - 5   2022年

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    記述言語:日本語   出版者・発行元:(一社)日本心臓病学会  

    J-GLOBAL

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  • 肺循環評価における動態解析の臨床応用-肺塞栓症を中心に-

    山崎誘三

    Innervision   37 ( 10 )   76 - 76   2022年   ISSN:0913-8919

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    記述言語:日本語   出版者・発行元:(株)インナービジョン  

    J-GLOBAL

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  • 日常診療で見かける肺血管,大血管の正常破格と先天奇形

    山崎誘三

    日本医学放射線学会秋季臨床大会抄録集   58th   S367 - S367   2022年   ISSN:0048-0428 eISSN:1347-7951

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    記述言語:日本語   出版者・発行元:(公社)日本医学放射線学会  

    J-GLOBAL

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  • 新しい画像診断技術のデジタルX線動画撮影(DDR)はファロー四徴症術後の肺動脈狭窄のスクリーニング検査として有用である。

    豊村大亮, 永田弾, 山崎誘三, 長友雄作, 平田悠一郎, 福岡将治, 山村健一郎, 石神康生, 大賀正一

    日本小児循環器学会総会・学術集会(Web)   58th   [II - 05]   2022年

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    記述言語:日本語   出版者・発行元:(NPO)日本小児循環器学会  

    J-GLOBAL

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  • Innervision 1.CTの技術革新が広げる循環器画像診断の可能性 4)2層検出器スペクトラルCTが生み出す循環器画像診断の新たな可能性 査読

    山崎誘三, 神谷武志, 鷺山幸二, 樋田知之, 松浦由布子, 藪内英剛, 石神康生

    2021年4月

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    記述言語:日本語  

  • Innervision 研究会報告:第2回X線動態画像セミナー 査読

    山崎 誘三

    2020年3月

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    記述言語:日本語  

  • 耳下腺腫瘍との鑑別を要した耳下部solitary fibrous tumorの1例

    松浦 由布子, 神谷 武志, 鷺山 幸二, 山崎 誘三, 日野 卓也, 筒井 聡一郎, 本田 浩, 安松 隆治, 山元 英崇, 藪内 英剛

    Japanese Journal of Radiology   2020年2月

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    記述言語:日本語  

  • Normalization of Right Ventricular Size Can Be Predicted by Its Size Before Transcatheter Closure in Adult Atrial Septal Defect Patients

    Shintaro Umemoto, Ichiro Sakamoto, Kohtaro Abe, Ayako Ishikita, Yuzo Yamasaki, Ken-ichi Hiasa, Tomomi Ide, Hiroyuki Tsutsui

    CIRCULATION   2018年11月

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    記述言語:英語  

    0

  • 低管電圧撮影と新たなスキャンタイミング決定法による320列冠動脈CT検査:造影剤低減効果の検討

    白坂崇, 長尾充展, 山崎誘三, 小島宰, 下宮大和, 近藤雅敏, 吉川英樹

    日本放射線技術学会総会学術大会予稿集   2018年3月

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    記述言語:日本語  

    低管電圧撮影と新たなスキャンタイミング決定法による320列冠動脈CT検査:造影剤低減効果の検討

  • 低管電圧撮影と新たなスキャンタイミング決定法による320列冠動脈CT検査:造影剤低減効果の検討

    白坂崇, 長尾充展, 山崎誘三, 小島宰, 下宮大和, 近藤雅敏, 吉川英樹

    日本放射線技術学会総会学術大会予稿集   2018年3月

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    記述言語:日本語  

    低管電圧撮影と新たなスキャンタイミング決定法による320列冠動脈CT検査:造影剤低減効果の検討

  • 症例 放射線治療後に発生した骨盤部骨軟骨腫の1例 : PET/MRIの有用性について

    小田原 裕子, 川波 哲, 神谷 武志, 鷺山 幸二, 山崎 誘三, 渡邊 祐司, 水島 明, 本田 浩

    臨床放射線   2017年10月

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    記述言語:日本語  

    A case of secondary osteochondroma occurred in the pelvic bone after radiation therapy : utility of PET/MRI

    DOI: 10.18888/rp.0000000131

  • 320列冠動脈CTの至適撮影タイミング:大動脈時間濃度曲線による新たな決定法

    白坂崇, 長尾充展, 小島宰, 山崎誘三, 下宮大和, 中村泰彦, 本田浩

    日本放射線技術学会総会学術大会予稿集   2017年3月

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    記述言語:日本語  

    320列冠動脈CTの至適撮影タイミング:大動脈時間濃度曲線による新たな決定法

  • 嚢胞内腫瘍との鑑別が問題となった、広汎な出血性梗塞を来した線維腺腫の1例

    藤田 陽子, 神谷 武志, 米澤 政人, 山崎 誘三, 本田 浩, 川波 哲, 長尾 充展, 藪内 英剛, 山元 英崇, 徳永 えり子

    Japanese Journal of Radiology   2016年2月

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    記述言語:日本語  

  • Innervision 臨床報告 Ziostation2を用いた大動脈弁狭窄症のバルサルバ洞の伸展性評価 査読

    下宮大和, 長尾充展, 米澤政人, 山崎誘三, 白坂 崇, 近藤雅敏, 濱崎洋志, 寳部真也, 中村泰彦

    2015年3月

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    記述言語:日本語  

  • 【エビデンスに基づく乳癌診療の最前線】微小乳癌の診断法 CT、MRI

    藪内 英剛, 松尾 芳雄, 川波 哲, 神谷 武志, 米澤 政人, 山崎 誘三, 長尾 充展, 久保 真, 徳永 えり子, 山元 英崇, 本田 浩

    臨牀と研究   2013年10月

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    記述言語:日本語  

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特許権   出願件数: 1件   登録件数: 1件
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所属学協会

  • 日本医学放射線学会

  • 日本循環器学会

  • 日本磁気共鳴医学会

  • 日本心臓血管放射線研究会

  • 日本心血管画像動態学会

  • 日本磁気共鳴医学会

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  • 日本心血管画像動態学会

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  • 日本心臓血管放射線研究会

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  • 日本循環器学会

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  • 日本医学放射線学会

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委員歴

  • Asian Oceanian Society of Radiology   Member of the Education and Training Committee  

    2024年4月 - 現在   

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    団体区分:学協会

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  • 日本医学放射線学会   放射線診療ガイドライン委員  

    2023年 - 2026年   

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    団体区分:学協会

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  • 日本医学放射線学会   専門医試験実施委員会委員  

    2022年4月 - 現在   

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    団体区分:学協会

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  • 九州大学   副病棟医長  

    2021年4月 - 2022年4月   

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    団体区分:その他

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  • 九州大学   外来化学療法委員会委員  

    2021年4月 - 2022年3月   

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    団体区分:その他

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  • 九州大学   がん薬物療法レジメン審査委員会委員  

    2021年4月 - 2022年3月   

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    団体区分:その他

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  • 九州大学   感染対策担当者  

    2020年4月 - 2022年3月   

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    団体区分:その他

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  • 九州大学   カルテ委員会委員  

    2020年4月 - 2022年3月   

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    団体区分:その他

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学術貢献活動

  • 第9回日本肺高血圧・肺循環学会学術集会

    役割:パネル司会・セッションチェア等

    2024年8月

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  • パネル司会・セッションチェア等

    九州山口循環器画像研究会  ( Japan ) 2023年2月 - 現在

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    種別:大会・シンポジウム等 

  • 九州山口循環器画像研究会

    役割:パネル司会・セッションチェア等

    2023年2月

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    種別:学会・研究会等 

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  • パネル司会・セッションチェア等

    第50回日本磁気共鳴医学会大会  ( Japan ) 2022年9月

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    種別:大会・シンポジウム等 

  • 第50回日本磁気共鳴医学会大会

    役割:パネル司会・セッションチェア等

    日本磁気共鳴医学会  2022年9月

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    種別:学会・研究会等 

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  • 学術論文等の審査

    役割:査読

    2022年

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    種別:査読等 

    外国語雑誌 査読論文数:6

  • パネル司会・セッションチェア等

    九州山口循環器画像研究会  ( 福岡市 Japan ) 2020年2月

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    種別:大会・シンポジウム等 

  • 学術論文等の審査

    役割:査読

    2020年

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    種別:査読等 

    外国語雑誌 査読論文数:3

  • パネル司会・セッションチェア等

    日本心臓血管放射線研究会  ( 東京都 Japan ) 2019年7月

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    種別:大会・シンポジウム等 

  • パネル司会・セッションチェア等

    九州山口循環器画像研究会  ( 福岡市 Japan ) 2019年3月

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    種別:大会・シンポジウム等 

  • 学術論文等の審査

    役割:査読

    2019年

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    種別:査読等 

    外国語雑誌 査読論文数:2

  • パネル司会・セッションチェア等

    九州山口循環器画像研究会  ( 福岡市 Japan ) 2018年3月

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    種別:大会・シンポジウム等 

  • パネル司会・セッションチェア等, 査読

    第81回日本医学放射線学会総会  ( Japan ) - 2022年4月

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    種別:大会・シンポジウム等 

  • 第81回日本医学放射線学会総会

    役割:パネル司会・セッションチェア等, 査読

    日本医学放射線学会  - 2022年4月

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    種別:学会・研究会等 

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その他

  • 漫画「ラジエーションハウス」制作協力

    2023年7月

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    Scan 118-124: アプリコットバケーション 制作協力

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共同研究・競争的資金等の研究課題

  • 心筋の血流と運動の予備能を同時評価する分子画像解析の開発と冠微小循環障害への応用

    研究課題/領域番号:24K10863  2024年4月 - 2027年3月

    科学研究費助成事業  基盤研究(C)

    河窪 正照, 長尾 充展, 立石 恵実, 山崎 誘三

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    資金種別:科研費

    冠動脈が狭窄していないにも関わらず心筋虚血症状を有するINOCAという新しい病態を明らかにすることは重要であり、アンモニアPET検査によるINOCA診断は期待が寄せられている。そこで本研究は、独自のPETによる心筋ストレイン解析技術を用いて、1度のPET検査で心筋血流予備能と心筋運動予備能を評価する技術を確立し、心筋予備能解析の確立とINOCAの病態解明への応用を目指す。

    CiNii Research

  • 動態撮影と人工知能を用いた先天性横隔膜ヘルニアにおける呼吸機能予測モデルの開発

    研究課題/領域番号:24K11785  2024年4月 - 2027年3月

    科学研究費助成事業  基盤研究(C)

    永田 公二, 山崎 誘三, 近藤 琢也, 福田 篤久, 田尻 達郎, 鷺山 幸二

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    資金種別:科研費

    CDHは重症度によって予後が層別化されているため、重症度に応じた呼吸機能の増悪があるものと予想される。呼吸機能検査データとDCRデータ(視覚機能データ)を統合し、重症度を予測する。DCRデータでは、関心領域(ROI)を評価し、健側肺と患側肺の左右差を計測する。換気血流シンチデータ、呼吸機能検査データ、胸郭変動データ、横隔膜挙動データを統合し、教師データを作成する。これらのデータを統合し、ディープラーニングが導入されたWorkstationをプログラミングに教師データとして学習させ、全自動での長期呼吸機能を予測するシステムを構築する。

    CiNii Research

  • 胸部X線動態撮影と人工知能を組み合わせた全自動式肺塞栓症診断システムの開発

    研究課題/領域番号:23K07111  2023年 - 2026年

    日本学術振興会  科学研究費助成事業  基盤研究(C)

    山崎 誘三, 神谷 武志, 鷺山 幸二, 日野 卓也, 藪内 英剛, 石神 康生, 河窪 正照, 阿部 弘太郎, 細川 和也

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    担当区分:研究代表者  資金種別:科研費

    急性肺塞栓症は時に致死的になる重篤な疾患である。 造影CTや肺血流シンチグラフィによる早期診断が必要であるが、造影剤、被曝などの問題点も存在する。胸部X線動態撮影は、造影剤や放射性同位元素を用いる ことなく、単純X線撮影システムを用いて、肺血流情報を得ることができる最新の検査技術である。本研究では、胸部X線動態撮影を肺塞栓症診断補助装置として確立し、さらに胸部X線動態撮影と人工知能を組み合わせた全自動式の肺塞栓症診断システムの開発を目指す。

    CiNii Research

  • 低線量胸部X線動画像を用いた肺循環・呼吸動態評価法の検討

    2021年7月 - 2024年3月

    共同研究

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    担当区分:研究分担者  資金種別:その他産学連携による資金

  • 高中心静脈圧/高心拍出型Failed Fontanの病態解明と治療法の確立

    研究課題/領域番号:21K08031  2021年 - 2023年

    日本学術振興会  科学研究費助成事業  基盤研究(C)

    永田 弾, 山崎 誘三, 長尾 吉泰, 坂本 一郎

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    資金種別:科研費

    高中心静脈圧/高心拍出型Failed Fontanの予後は極めて不良であり、この疾患群に対する適切な管理を確立することは臨床的重要課題と言える。門脈体循環シャントが何かしらの影響を与えていると予測するが、その関連メカニズムはまだ不明である。各種のmodalityを用いてこの疾患群の臨床像を明らかにし、適切な薬剤使用を含めた、よりよい管理指針を確立することを目指す。

    CiNii Research

  • 低線量X線肺血流イメージングを用いた慢性血栓塞栓性肺高血圧症の新規診断法の確立

    研究課題/領域番号:20K16728  2020年 - 2022年

    日本学術振興会  科学研究費助成事業  若手研究

    山崎 誘三

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    担当区分:研究代表者  資金種別:科研費

    低線量X線肺血流イメージングは、一般単純撮影システムとほぼ同規模の システムで、造影剤や放射性核種を使用することもなく、低被曝で肺血流イメージが取得で きる最新の機器です。これを慢性血栓塞栓性肺高血圧症簡に応用し、簡便かつ患者負担の少ないスクリーニング法、診断法として確立することを目標としています。

    CiNii Research

  • MRI高分解能T1マップとデュアルエナジーCTによる右室線維化定量評価法の確立

    研究課題/領域番号:20K08449  2020年 - 2022年

    日本学術振興会  科学研究費助成事業  基盤研究(C)

    山村 健一郎, 坂本 一郎, 山崎 誘三, 孝橋 賢一, 帯刀 英樹, 塩瀬 明

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    資金種別:科研費

    Fallot四徴症は心内修復術後も肺動脈弁閉鎖不全/狭窄により慢性的な右室負荷が残存し、成人期に右室機能不全、致死性不整脈を生じうる。これに対する肺動脈弁置換術の手術適応は世界的に見ても未だに定まっていない。本研究では、肺動脈弁置換術中の右室心筋生検組織と、MRI高分解能T1 mappingやDual-energy CTといった最新の画像診断技術を用いて、右室心筋線維化の重症度を非侵襲的、定量的に正確に評価する手法を確立する。Fallot四徴症の再手術適応判断はもちろん、肺高血圧症の治療効果判定などにも新たに安全かつ有用な指標を提供し、ガイドライン改訂/患者予後改善に寄与することを目指す。

    CiNii Research

  • 二層検出器CTと人工知能を用いた三次元的な定量的心筋線維化評価法の開発

    2020年

    日本医学放射線学会Bayer研究助成金

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    担当区分:研究代表者  資金種別:受託研究

  • 低線量胸部動態X線画像を用いた呼吸器、循環器疾患の病態解明および臨床的意義の検討

    2019年12月 - 2021年9月

    共同研究

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    担当区分:研究分担者  資金種別:その他産学連携による資金

  • 頭頚部悪性腫瘍に対するPET/MRによる画素単位でのマルチパラメトリック解析

    研究課題/領域番号:19K08228  2019年 - 2023年

    日本学術振興会  科学研究費助成事業  基盤研究(C)

    鷺山 幸二, 山崎 誘三, 神谷 武志, 松浦 由布子, 筒井 聡一郎, 藪内 英剛, 中山 智博, 樋田 知之

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    資金種別:科研費

    頭頚部がんの治療方針の決定には画像を用いた検査が不可欠だが、従来のCTやMRIといった検査は解剖学的情報しか得られず、がんの性質の正確な評価や治療効果の判定がしばしば困難であった。
    近年開発されたPET/MR装置はFDG-PETによる糖の代謝情報とMRによる詳細な解剖学的情報および様々な機能画像を同時に取得可能な新しいマルチ分子イメージング装置である。
    本研究ではPET/MR装置による複数の代謝・機能画像を組み合わせたマルチパラメトリックイメージング手法を確立し、頭頚部がんの悪性度評価および治療効果の判定や予測に応用することを目指す。

    CiNii Research

  • 乳腺腫瘍へのCESTイメージングの臨床応用と有用性の確立

    研究課題/領域番号:18K07717  2018年 - 2022年

    日本学術振興会  科学研究費助成事業  基盤研究(C)

    神谷 武志, 鷺山 幸二, 山崎 誘三, 松浦 由布子, 日野 卓也, 筒井 聡一郎, 藪内 英剛, 本田 浩

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    資金種別:科研費

    2cm以上の未治療乳癌(浸潤性乳管癌)66症例について、APT信号と生物学的所見との比較を行った。トリプルネガティブ乳癌はluminalタイプ乳癌、HER2タイプ乳癌よりも有意に高いAPT信号を示した。Ki-67とAPT信号に弱い正の相関が認められ、Ki-67高値 (>30%)の乳癌はKi-67低値 (≦30%)の乳癌より有意にAPT信号が高かった。一方、核グレードによるAPT信号の有意差は見られなかった。
    これらの結果について、European Congress of Radiology (ヨーロッパ放射線学会) 2022にて発表を行い、論文がClinical Imaging誌に掲載された。

    CiNii Research

  • 妊娠によるFontan循環と胎児循環の変化メカニズムの解明

    研究課題/領域番号:18K08109  2018年 - 2022年

    日本学術振興会  科学研究費助成事業  基盤研究(C)

    永田 弾, 山崎 誘三, 坂本 一郎

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    資金種別:科研費

    妊娠前のFontan循環としては比較的安定している症例が多かった。Fontan循環における妊娠においては、不整脈の出現はなかったものの、心不全の出現などのイベントがみられた。抗凝固療法を行っており、血栓イベントはなかったものの、出血性イベントが起こる傾向にあった。房室弁逆流や、BNPの上昇などもみられ、全体として、妊娠による循環血漿量の上昇がフォンタン循環へ影響を与えいることが示唆された。新生児は早産、低出生体重の傾向にあることがわかった。胎児においては、Tei-indexが上昇している傾向にあり、胎盤循環の影響が示唆された。

    CiNii Research

  • MRIによる慢性血栓塞栓性肺高血圧症の非侵襲的評価法の確立と左右肺血流特性の解明

    研究課題/領域番号:17K16452  2017年 - 2019年

    科学研究費助成事業  若手研究(A,B)

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    担当区分:研究代表者  資金種別:科研費

  • MRI4次元フローとT1マップによるフォンタン循環エネルギー効率と線維化の解析

    研究課題/領域番号:16K10321  2016年 - 2018年

    日本学術振興会  科学研究費助成事業  基盤研究(C)

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    資金種別:科研費

  • CESTイメージングによる頭頚部腫瘍の悪性度診断の確立と治療効果予測への応用

    研究課題/領域番号:15K09928  2015年 - 2017年

    日本学術振興会  科学研究費助成事業  基盤研究(C)

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    資金種別:科研費

  • MRIを用いた慢性血栓塞栓性肺高血圧症の新たな非侵襲的評価法の開発

    研究課題/領域番号:15H06478  2015年 - 2016年

    日本学術振興会  科学研究費助成事業  研究活動スタート支援

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    担当区分:研究代表者  資金種別:科研費

  • 成人先天性心疾患のシネタギングMRIによる右室ストレインと心臓同期不全解析の開発

    研究課題/領域番号:25461831  2013年 - 2015年

    日本学術振興会  科学研究費助成事業  基盤研究(C)

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    資金種別:科研費

▼全件表示

教育活動概要

  • <医学部6年生のクリニカルクラークシップにおける講義、研修成果発表会の指導>
    読影室にて実際の単純写真、CT、MRIを使用して、代表的な症例の読影を行ってもらう。その後、一緒に画像を供覧しながら、撮影における注意点、画像所見のとり方、解釈の仕方などを踏まえながら、読影を指導している。また一ヶ月の研修期間中に一つテーマを決め、そのテーマに対して深く学習し、まとめのスライドを作成してもらい、画像診断への理解を深めてもらっている。まとめた内容は研修終了前の研修成果発表会にて発表してもらっている。

    <臨床研修医の読影指導>
    読影室にて日々の症例の一時読影を行ってもらう。その後、一緒に画像を供覧しながら、撮影における注意点、画像所見のとり方、解釈の仕方などを踏まえながら、読影を指導している。また、毎週木曜午後にその週にあった教育的な症例を供覧し、画像所見の解説を行っている。

担当授業科目

  • 検査実習

    2020年10月 - 2021年3月   後期

社会貢献・国際連携活動概要

  • 九州大学病院において放射線診断業務に従事
    新たな画像診断法の確立のための研究および成果の報告
    胸部及び循環器領域の画像診断 に関して、放射線科医や放射線技師を対象とした研究会や 講習会で、教育講演を行っている
    心臓MRIの普及・発展のため、依頼を受けて、SCMRガイドライン(英語版)の和訳を行い、HPにも掲載されている (https://scmr.org/page/TranslatedPapers)。

メディア報道

  • Researchers highlight the potential of dynamic chest radiography

    AuntMinnie.com  2023年9月

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    Researchers highlight the potential of dynamic chest radiography

  • Researchers highlight the potential of dynamic chest radiography

    AuntMinnie.com  https://www.auntminnie.com/index.aspx?sec=ser&sub=def&pag=dis&ItemID=141068  2023年9月

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  • 「慢性血栓塞栓性肺高血圧症」を早期診断 新聞・雑誌

    西日本新聞社  西日本新聞  9面 https://www.nishinippon.co.jp/item/n/1043991/?fbclid=IwAR2wsySXNji8_2L5FQPbfSWAM8M0Ey4AYO2zc0uLj7TW8t_wQ4GaWoGjJPQ  2023年1月

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  • Diagnosis of pulmonary thromboembolisms through chest radiography: High precision system developed by Kyushu University and Konica Minolta インターネットメディア

    国立研究開発法人 科学技術振興機構  Science Japan  https://sj.jst.go.jp/news/202301/n0120-01k.html?fbclid=IwAR3i1-6Aybc17UXhATEmMCkOiNS9mnuuX3p1iJ5-518m6ukgxXYKez8N7SI  2023年1月

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  • 「慢性血栓塞栓性肺高血圧症」を早期診断

    西日本新聞  2023年1月

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    「慢性血栓塞栓性肺高血圧症」を早期診断

  • Diagnosis of pulmonary thromboembolisms through chest radiography: High precision system developed by Kyushu University and Konica Minolta

    Science Japan  2023年1月

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    Diagnosis of pulmonary thromboembolisms through chest radiography: High precision system developed by Kyushu University and Konica Minolta

  • Dr. Yuzo Yamasaki Receives RSNA’s Cum Laude Award for Dynamic Digital Radiography Education Exhibit During Annual Meeting インターネットメディア

    IMAGING TECHNOLOGY NEWS  https://www.itnonline.com/content/dr-yuzo-yamasaki-receives-rsna’s-cum-laude-award-dynamic-digital-radiography-education  2022年12月

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  • 胸部X線動態撮影から低被曝で肺塞栓症診断 新聞・雑誌

    科学新聞  4面  2022年12月

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    執筆者:本人以外 

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  • 胸部X線動態撮影から低被曝で肺塞栓症診断

    科学新聞  2022年12月

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    胸部X線動態撮影から低被曝で肺塞栓症診断

  • Dr Yamasaki Receives RSNA Cum Laude Award for Dynamic Digital Radiography Education Exhibit

    Applied Radiology  2022年12月

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    Dr Yamasaki Receives RSNA Cum Laude Award for Dynamic Digital Radiography Education Exhibit

  • Dr. Yuzo Yamasaki Receives RSNA’s Cum Laude Award for Dynamic Digital Radiography Education Exhibit During Annual Meeting

    IMAGING TECHNOLOGY NEWS  2022年12月

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    Dr. Yuzo Yamasaki Receives RSNA’s Cum Laude Award for Dynamic Digital Radiography Education Exhibit During Annual Meeting

  • Dr Yamasaki Receives RSNA Cum Laude Award for Dynamic Digital Radiography Education Exhibit インターネットメディア

    Applied Radiology  https://appliedradiology.com/articles/dr-yamasaki-receives-rsna-cum-laude-award-for-dynamic-digital-radiography-education-exhibit#  2022年12月

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  • Study Reports Similar Efficacy of Dynamic Digital Radiography of the Chest with Lung Ventilation Perfusion for Detection of Chronic Thromboembolic Pulmonary Hypertension インターネットメディア

    Imaging Technology News  https://www.itnonline.com/content/study-reports-similar-efficacy-dynamic-digital-radiography-chest-lung-ventilation-perfusion  2022年11月

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    執筆者:本人以外 

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  • 胸部X線画像の連続撮像で簡便かつ低被ばくに肺塞栓症を診断するシステム インターネットメディア

    MONOist  https://monoist.itmedia.co.jp/mn/articles/2211/28/news012.html  2022年11月

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  • Study Finds Similar Efficacy of Dynamic Digital Radiography with Lung Ventilation Perfusion in CTEPH Patients インターネットメディア

    Applied Radiology  https://appliedradiology.com/articles/study-finds-similar-efficacy-of-dynamic-digital-radiography-with-lung-ventilation-perfusion-in-cteph-patients  2022年11月

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    執筆者:本人以外 

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  • Study Reports Similar Efficacy of Dynamic Digital Radiography of the Chest with Lung Ventilation Perfusion for Detection of Chronic Thromboembolic Pulmonary Hypertension インターネットメディア

    GlobeNewsWire  https://www.globenewswire.com/news-release/2022/11/22/2561215/0/en/Study-Reports-Similar-Efficacy-of-Dynamic-Digital-Radiography-of-the-Chest-with-Lung-Ventilation-Perfusion-for-Detection-of-Chronic-Thromboembolic-Pulmonary-Hypertension.html  2022年11月

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  • 精度92%、九大などが胸部X線動態撮影で肺塞栓症を診断するシステム開発 インターネットメディア

    ニュースイッチ  https://newswitch.jp/p/34595  2022年11月

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    執筆者:本人以外 

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  • 九大など、胸部X線動態撮影で診断するシステム開発 肺塞栓症を高精度診断 インターネットメディア

    日刊工業新聞  https://www.nikkan.co.jp/articles/view/00654199  2022年11月

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  • Dynamic chest radiography a viable way to diagnose lung hypertension インターネットメディア

    AuntMinnie.com  https://www.auntminnie.com/clinical-news/article/15632232/dynamic-chest-radiography-a-viable-way-to-diagnose-lung-hypertension  2022年11月

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  • 肺塞栓症、簡便・低被曝に診断可能な胸部X線動態撮影システムを開発-九大ほか インターネットメディア

    医療ニュースQLifePro  http://www.qlifepro.com/news/20221110/cteph-2.html  2022年11月

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  • Dynamic chest radiography a suitable, low-cost alternative to V/Q scanning for pulmonary hypertension インターネットメディア

    Health Imaging  https://healthimaging.com/topics/medical-imaging/nuclear-medicine/dynamic-chest-radiography-pulmonary-hypertension  2022年11月

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  • 胸部X線画像の連続撮像で簡便かつ低被ばくに肺塞栓症を診断するシステム

    2022年11月

     詳細を見る

    胸部X線画像の連続撮像で簡便かつ低被ばくに肺塞栓症を診断するシステム

  • Dynamic chest radiography a viable way to diagnose lung hypertension

    2022年11月

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    Dynamic chest radiography a viable way to diagnose lung hypertension

  • Dynamic chest radiography a suitable, low-cost alternative to V/Q scanning for pulmonary hypertension

    2022年11月

     詳細を見る

    Dynamic chest radiography a suitable, low-cost alternative to V/Q scanning for pulmonary hypertension

  • Study Finds Similar Efficacy of Dynamic Digital Radiography with Lung Ventilation Perfusion in CTEPH Patients

    2022年11月

     詳細を見る

    Study Finds Similar Efficacy of Dynamic Digital Radiography with Lung Ventilation Perfusion in CTEPH Patients

  • Study Reports Similar Efficacy of Dynamic Digital Radiography of the Chest with Lung Ventilation Perfusion for Detection of Chronic Thromboembolic Pulmonary Hypertension

    Imaging Technology News  2022年11月

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    Study Reports Similar Efficacy of Dynamic Digital Radiography of the Chest with Lung Ventilation Perfusion for Detection of Chronic Thromboembolic Pulmonary Hypertension

  • Study Reports Similar Efficacy of Dynamic Digital Radiography of the Chest with Lung Ventilation Perfusion for Detection of Chronic Thromboembolic Pulmonary Hypertension

    2022年11月

     詳細を見る

    Study Reports Similar Efficacy of Dynamic Digital Radiography of the Chest with Lung Ventilation Perfusion for Detection of Chronic Thromboembolic Pulmonary Hypertension

  • 九大など、胸部X線動態撮影で診断するシステム開発 肺塞栓症を高精度診断

    日刊工業新聞  2022年11月

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    九大など、胸部X線動態撮影で診断するシステム開発 肺塞栓症を高精度診断

  • 精度92%、九大などが胸部X線動態撮影で肺塞栓症を診断するシステム開発

    2022年11月

     詳細を見る

    精度92%、九大などが胸部X線動態撮影で肺塞栓症を診断するシステム開発

  • 肺塞栓症、簡便・低被曝に診断可能な胸部X線動態撮影システムを開発-九大ほか

    2022年11月

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    肺塞栓症、簡便・低被曝に診断可能な胸部X線動態撮影システムを開発-九大ほか

  • コニカミノルタ、九州大学によるデジタルX線動画撮影に関する研究成果が国際学術雑誌に掲載 インターネットメディア

    日本経済新聞  https://www.nikkei.com/article/DGXZRSP643699_Z01C22A1000000/  2022年9月

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    執筆者:本人以外 

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  • コニカミノルタ、九州大学によるデジタルX線動画撮影に関する研究成果が国際学術雑誌に掲載

    日本経済新聞  2022年9月

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    コニカミノルタ、九州大学によるデジタルX線動画撮影に関する研究成果が国際学術雑誌に掲載

  • 低線量胸部X線撮影システムを用いた新たな肺血流評価法の確立

    科研費 研究成果トピックス  2021年1月

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    低線量胸部X線撮影システムを用いた新たな肺血流評価法の確立

▼全件表示

海外渡航歴

  • 2018年6月 - 2018年10月

    滞在国名1:オランダ王国   滞在機関名1:Erasmus University Medical Center Rotterdam

学内運営に関わる各種委員・役職等

  • 2021年4月 - 2022年4月   その他 副病棟医長

  • 2021年4月 - 2022年3月   その他 輸血療法委員会委員

  • 2021年4月 - 2022年3月   その他 外来化学療法委員会委員

  • 2021年4月 - 2022年3月   その他 がん薬物療法レジメン審査委員会委員

  • 2020年4月 - 2025年3月   その他 感染対策担当者

  • 2020年4月 - 2025年3月   その他 カルテ委員会委員

  • 2019年4月 - 2020年3月   その他 外来診療部門運営委員会委員

  • 2019年4月 - 2020年3月   その他 外来医長

  • 2019年4月 - 2020年3月   その他 保険診療適正化推進委員会委員

▼全件表示

専門診療領域

  • 生物系/医歯薬学/内科系臨床医学/放射線科学

臨床医資格

  • 専門医

    日本医学放射線学会

医師免許取得年

  • 2006年

特筆しておきたい臨床活動

  • 九州大学病院にて放射線科診断専門医として、胸部・骨軟部・頭頸部・乳腺・心大血管疾患の画像診断に関連した業務を担っている。特に心大血管疾患に関しては撮影方法の決定から読影まで中心的役割を果たしている。また、IVRも積極的に行っており、肺疾患に対するCTガイド下生検、頭頸部癌に対する動注化学療法を施行者もしくは指導者として担当している。 各診療科と行われる、以下のカンファレンスを担当している。下記以外にも適宜各診療科との連携をとっている。 ・月曜午後(毎週):乳腺カンファレンス ・火曜午後(毎週):外科術前カンファレンス ・水曜午後(毎週):耳鼻科カンファレンス ・水曜午後(毎月):循環器カンファレンス ・金曜午前(毎週):呼吸器カンファレンス 2019年度 外来医長