Publisher：株式会社医学書院  

DOI： 10.11477/mf.1403203776

CiNii Research

Language：English   Publisher：Radiology Case Reports  

A case of esophageal lymphangioma in a 75-year-old man who complained of worsening dysphagia is presented. Endoscopic ultrasound showed an echogenic pattern of honeycomb or grid-like multiple microcysts within the submucosa. The sagittal image of computed tomography showed a thickened esophageal wall and fluid retention in the proximal esophageal lumen. Magnetic resonance imaging showed a high signal intensity mass with a septate-like internal structure on T2-weighted imaging and short tau inversion recovery. The tumor was completely resected by endoscopic submucosal dissection. Esophageal lymphangioma is a rare submucosal tumor that can be precisely diagnosed by CT and/or MRI.

DOI： 10.1016/j.radcr.2024.07.144

Scopus

PubMed

Language：English   Publisher：Japanese Journal of Radiology  

Purpose: The aim of this study was to compare the accuracy of colonoscopy (CS) and CT colonography (CTC) in the measurement of colorectal polyps using pathological size as a reference. Materials and methods: The analysis included 61 colorectal polyps in 28 patients who underwent preoperative CTC at our institution. All polyps were endoscopically resected. Polyp sizes were measured by CS and CTC. Endoscopic polyp size was extracted from endoscopy records written by one of two endoscopists (A with 11 and B with 6 years of endoscopic experience, respectively), who estimated the size visually/categorically without any measuring devices. After matching the location, the polyp size was measured on CTC using manual three-dimensional (3D) measurement on a workstation. The sizes of resected polyps were also measured after pathological inspection. Differences of the polyp size between CTC and histology, and between CS and histology were compared using paired t tests. Differences in measurement between the two endoscopists were also analyzed. Results: The mean diameters of polyps measured using CS, CTC, and pathology were 10.5 mm, 9.2 mm, and 8.4 mm, respectively. There was a significant correlation between CS and pathology, as well as between CTC and pathology (both P < 0.0001). The correlation coefficient for CS (r = 0.86) was lower than that for CTC (r = 0.96). The correlations between CS and pathology for endoscopists A and B were 0.90 and 0.89, respectively. Conclusion: Measurements of polyp size using CTC were closer to the pathological measurements compared to those by CS, which exhibited greater variability. This suggests that CTC may be more suitable for polyp size measurements in the clinical setting if patients undergo CTC concurrently with colonoscopy.

DOI： 10.1007/s11604-024-01625-0

Web of Science

Scopus

PubMed

Language：English   Publisher：(公社)日本医学放射線学会  

Publisher：日本メディカルセンター  

DOI： 10.19020/cg.0000003106

CiNii Research

Publisher：金原出版  

DOI： 10.18888/rp.0000002708

CiNii Research

Language：Japanese   Publisher：日本大腸検査学会  

隆起型早期大腸癌は内視鏡での深達度診断が難しい場合がある。本研究ではCT colonography(CTC)の側面像に着目し、粘膜内癌(M癌)と粘膜下層癌(SM癌)の鑑別が可能かを検証した。2名の放射線科医による読影で、SM癌の診断の感度は63.6%、100.0%、特異度は77.8%、66.7%であった。本法は、早期大腸癌の深達度診断における補助的な診断法として有用であると考えられる。(著者抄録)

Publisher：金原出版  

DOI： 10.18888/rp.0000002549

CiNii Research

Language：English   Publisher：(公社)日本医学放射線学会  

胃の小型の消化管間質腫瘍(GIST)と平滑筋腫の鑑別におけるdual-energy dual-layer CT(dlDECT)パラメータの有用性について後方視的に検討した。2018年5月～2022年1月に病理学的に確認された直径4cm以下のGIST患者17人(男性11人、女性6人、40～81歳)と平滑筋腫患者9人(男性5人、女性4人、27～72歳)を対象とした。GISTと平滑筋腫におけるdlDECTパラメータの標準化ヨウ素濃度及びスペクトル傾斜を比較した。その結果、dlDECTパラメータは小型のGSTと平滑筋腫の鑑別に有用な指標であることが示された。

Language：English   Publisher：Japanese Journal of Radiology  

Purpose: Small gastrointestinal stromal tumors (GISTs) can generally have nonspecific CT findings similar to those with benign submucosal tumors of the stomach. The purpose of this study was to explore the potential dual-layer dual-energy CT (dlDECT) parameters to differentiate small-sized (≤ 4 cm) GISTs from leiomyomas of the stomach. Materials and methods: This retrospective study included 26 SMTs ≤ 4 cm in diameter with pathological confirmation of either GIST (n = 17) or leiomyoma (n = 9) from May 2018 to January 2022. All patients received contrast-enhanced CT. The normalized iodine concentration (NIC) and spectral slope (λ HU) were compared between GIST and leiomyoma. Receiver-operating characteristic (ROC) curves were plotted and the areas under the curve (AUCs) were calculated to estimate the diagnostic performance of these markers for differentiating GISTs from leiomyomas. Results: NIC was significantly higher in GIST than in leiomyoma in the portal (P = 0.0019) and delayed phases (P = 0.0011). λ HU was significantly higher in GIST than in leiomyoma in the portal (P = 0.0006) and delayed phases (P = 0.0009). AUC of the ROC curves using NIC to differentiate between GIST and leiomyoma were 0.875 and 0.895 in the portal and delayed phase; using λ HU, they were 0.918 and 0.902 in the portal and delayed phase. Conclusion: dlDECT parameters including NIC and λ HU show promise as indicators for differentiating small-sized GISTs from leiomyomas.

DOI： 10.1007/s11604-023-01473-4

Web of Science

Scopus

PubMed

Language：English   Publisher：Japanese Journal of Radiology  

DOI： 10.1007/s11604-023-01471-6

Web of Science

Scopus

PubMed

Publisher：学研メディカル秀潤社  

DOI： 10.15105/gz.0000004836

CiNii Research

Language：Japanese   Publishing type：Research paper (scientific journal)  

Language：English   Publisher：(公社)日本医学放射線学会  

胃癌の病理組織学的特徴と術前の平衡相造影CT(CECT)により測定した腫瘍の細胞外容積分画(ECV)の関連について検討した。術前に多時相CECTを受け、切除組織の病理学検査で胃腺癌が確認された患者66人(男性33人、女性33人)を対象とした。単変量解析により血管浸潤及び浸潤増殖様式(INF)は腫瘍ECVと有意に相関し、多変量線形回帰分析においてもINFと腫瘍ECVの有意な相関が認められた。また、腫瘍ECVはINFの予測において良好な診断正確度を示しROC曲線下面積は0.89であった。

Publisher：金原出版  

DOI： 10.18888/rp.0000002137

CiNii Research

Publisher：メジカルビュー社  

DOI： 10.18885/ci.0000001064

CiNii Research

Publisher：株式会社医学書院  

DOI： 10.11477/mf.1403203001

CiNii Research

Language：English   Publishing type：Research paper (scientific journal)  

DOI： 10.1158/0008-5472.CAN-21-0653

Language：Japanese   Publishing type：Research paper (scientific journal)  

Language：English   Publishing type：Research paper (scientific journal)  

Language：Japanese   Publishing type：Research paper (scientific journal)  

Language：Japanese   Publishing type：Research paper (scientific journal)  

Language：Japanese   Publishing type：Research paper (scientific journal)  

Language：English   Publishing type：Research paper (scientific journal)  

Event date： 2014.6

Language：Japanese  

Country：Japan  

Language：Japanese  

Language：Japanese  

Language：Japanese  

Language：Japanese  

Language：Japanese  

Language：Japanese  

Language：English  

Language：Japanese  

Language：Japanese  

Language：Japanese   Publisher：金原出版(株)  

＜文献概要＞消化管領域において,癌は遭遇しやすい疾患の1つである。多くは内視鏡で確定診断がなされるが,病期診断も含めて造影CTが施行されるため,放射線科医にとってなじみのある疾患と思われる。消化管癌は共通してCTで典型的な画像所見である壁肥厚を示すため,診断に苦慮することは少ない。一方で,まれながら他の悪性腫瘍や良性疾患と紛らわしいことも経験する。本稿では,消化管癌の典型的な画像診断について,消化管では最もなじみのある造影CT所見を中心に解説する。

Language：English   Publisher：(公社)日本医学放射線学会  

Language：Japanese   Publisher：(株)Gakken  

＜文献概要＞Point　●胃癌の再発は腹膜播種再発が多く,造影CTで診断する.●腹膜播種再発は,腹膜・腹腔内の結節,軟部腫瘤,腹水を認める.●局所再発は,消化管や胆管の閉塞による機能障害が画像として現れる.

Language：Japanese   Publisher：大道学館出版部  

Language：Japanese   Publisher：(株)日本臨床社  

Language：Japanese   Publishing type：Article, review, commentary, editorial, etc. (scientific journal)  

Language：Japanese   Publisher：(株)メジカルビュー社  

＜文献概要＞消化管出血は一般に内視鏡により診断,治療を行うが,造影CTが重要となるケースもある。造影CTで消化管出血を評価する場合には,動脈相での撮影が必須であり,丁寧かつ詳細な観察により造影剤の血管外漏出(extravasation)を検索する。特に大腸憩室出血では出血部の同定に造影CTの貢献度は高い。

Language：Japanese   Publisher：金原出版(株)  

Language：Japanese   Publisher：(株)医学書院  

＜文献概要＞CTC(CT colonography)は,大腸に特化したCTの呼称であり,肛門からの送気により大腸を拡張させた状態で撮像する手法である.本邦では大腸癌の術前検査,大腸癌やポリープのスクリーニング検査として普及している.大腸癌術前検査においては,CTでのリンパ節転移診断,遠隔転移診断に加え,CTCによる局在診断および深達度診断が可能である.大腸ポリープに対するスクリーニングとしての成績は6mm以上のポリープで感度73～98%,特異度80～93%と十分に許容しうるものである.また,近年CT撮像機器の技術革新や人工知能(AI)の導入により,CTCは大腸癌診療において新たな局面を迎えている.