Kyushu University Academic Staff Educational and Research Activities Database
List of Papers
Takeshi Kamitani Last modified date:2021.07.15

Assistant Professor / Department of Clinical Radiology, Graduate School of Medical Sciences / Radiology / Kyushu University Hospital


Papers
1. Takuya Hino, Tomoyuki Hida, Mizuki Nishino, Junwei Lu, Rachel K. Putman, Elias F. Gudmundsson, Akinori Hata, Tetsuro Araki, Vladimir I. Valtchinov, Osamu Honda, Masahiro Yanagawa, Yoshitake Yamada, Takeshi Kamitani, Masahiro Jinzaki, Noriyuki Tomiyama, Kousei Ishigami, Hiroshi Honda, Raul San Jose Estepar, George R. Washko, Takeshi Johkoh, David C. Christiani, David A. Lynch, Vilmundur Gudnason, Gunnar Gudmundsson, Gary M. Hunninghake, Hiroto Hatabu, Progression of traction bronchiectasis/bronchiolectasis in interstitial lung abnormalities is associated with increased all-cause mortality: Age Gene/ Environment Susceptibility-Reykjavik Study, Eur J Radiol Open, 10;8:100334, 2021.03.
2. Kitamura Y, Baba S, Isoda T, Maruoka Y, Sasaki M, Kamitani T, Koga Y, Kawakubo N, Matsuura T, Ishigami K, 123I metaiodobenzylguanidine (MIBG) uptake predicts early relapse of neuroblastoma using semi-quantitative SPECT/CT analysis, Ann Nucl Med, 35(5):549-556, 2021.05.
3. Yamasaki Y, Abe K, Kamitani T, Sagiyama K, Hida T, Hosokawa K, Matsuura Y, Hioki K Nagao M, Yabuuchi H Ishigami K, Right Ventricular Extracellular Volume with Dual-Layer Spectral Detector CT: Value in Chronic Thromboembolic Pulmonary Hypertension, RADIOLOGY, 10.1148/radiol.2020203719, 298, 3, 589-596, 2021.03.
4. Yamasaki Y, Kamitani T, Sagiyama K, Matsuura Y, Hida T, Nagata H, Model-based iterative reconstruction for 320-detector row CT angiography reduces radiation exposure in infants with complex congenital heart disease, DIAGNOSTIC AND INTERVENTIONAL RADIOLOGY, 10.5152/dir.2020.19633, 27, 1, 42-+, 2021.01.
5. Hino T, Hata A, Hida T, Yamada Y, Ueyama M, Araki T, Kamitani T, Nishino M, Kurosaki A, Jinzaki M, Ishigami K, Honda H, Hatabu H, Kudoh S, Projected lung areas using dynamic X-ray (DXR), Eur J Radiol Open , 100263, 2020.07.
6. Chikui T, Tokumori K, Panyarak W, Togao O, Yamashita Y, Kawano S, Kamitani T, Yoshiura K., The application of a gamma distribution model to diffusion-weighted images of the orofacial region, DENTOMAXILLOFACIAL RADIOLOGY, 10.1259/dmfr.20200252, 50, 2, 2021.02.
7. Yabuuchi H, Kamitani T, Sagiyama K, Yamasaki Y, Hida T, Matsuura Y, Hino T, Murayama Y, Yasumatsu R, Yamamoto H, Characterization of parotid gland tumors: added value of permeability MR imaging to DWI and DCE-MRI, EUROPEAN RADIOLOGY, 10.1007/s00330-020-07004-3, 30, 12, 6402-6412, 2020.12.
8. Mikayama R, Yabuuchi H, Matsumoto R, Kobayashi K, Yamashita Y, Kimura M, Kamitani T, Sagiyama K, Yamasaki Y., Development of a new phantom simulating extracellular space of tumor cell growth and cell edema for diffusion-weighted magnetic resonance imaging., MAGMA , 33(4):507-513, 2020.08.
9. Hidetake Yabuuchi, Takeshi Kamitani, Koji Sagiyama, Yuzo Yamasaki, Tomoyuki Hida, Yuko Matsuura, Takuya Hino, Yuriko Murayama, Ryuji Yasumatsu, Hidetaka Yamamoto, Characterization of parotid gland tumors
added value of permeability MR imaging to DWI and DCE-MRI, European Radiology, 10.1007/s00330-020-07004-3, 2020.07, 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..
10. Yuzo Yamasaki, Kohtaro Abe, Takeshi Kamitani, Kazuya Hosokawa, Masateru Kawakubo, Koji Sagiyama, Tomoyuki Hida, Yuko Matsuura, Yuriko Murayama, Ryohei Funatsu, Hiroyuki Tsutsui, Hidetake Yabuuchi, Balloon pulmonary angioplasty improves right atrial reservoir and conduit functions in chronic thromboembolic pulmonary hypertension, European heart journal cardiovascular Imaging, 10.1093/ehjci/jeaa064, 21, 8, 855-862, 2020.08, 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% vs. 42.7%), RA LSR (6.3% vs. 8.3%), and RA early LSR (-2.3% vs. -4.3%) 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..
11. Takeshi Kamitani, Koji Sagiyama, Osamu Togao, Yuzo Yamasaki, Tomoyuki Hida, Yuko Matsuura, Yuriko Murayama, Ryuji Yasumatsu, Hidetaka Yamamoto, Hidetake Yabuuchi, Amide proton transfer (APT) imaging of parotid tumors
Differentiation of malignant and benign tumors, European Journal of Radiology, 10.1016/j.ejrad.2020.109047, 129, 2020.08, 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 % in the benign tumors and significantly higher at 2.99 ± 0.99 % 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%, 61.3%, and 67.4%, respectively. Conclusion: The mean APT SI of the malignant parotid tumors was significantly higher than that of the benign parotid tumors..
12. Mitsuhiro Kimura, Hidetake Yabuuchi, Ryoji Matsumoto, Koji Kobayashi, Yasuo Yamashita, Kazuya Nagatomo, Ryoji Mikayama, Takeshi Kamitani, Koji Sagiyama, Yuzo Yamasaki, The reproducibility of measurements using a standardization phantom for the evaluation of fractional anisotropy (FA) derived from diffusion tensor imaging (DTI), Magnetic Resonance Materials in Physics, Biology and Medicine, 10.1007/s10334-019-00776-w, 33, 2, 293-298, 2020.04, 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% 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..
13. Takuya Hino, Takeshi Kamitani, Koji Sagiyama, Yuzo Yamasaki, Yuko Matsuura, Soichiro Tsutsui, Yuki Sakai, Tadashi Furuyama, Hidetake Yabuuchi, Detectability of the artery of Adamkiewicz on computed tomography angiography of the aorta by using ultra-high-resolution computed tomography, Japanese Journal of Radiology, 10.1007/s11604-020-00943-3, 2020.01, 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..
14. Ryoji Mikayama, Hidetake Yabuuchi, Ryoji Matsumoto, Koji Kobayashi, Yasuo Yamashita, Mitsuhiro Kimura, Takeshi Kamitani, Koji Sagiyama, Yuzo Yamasaki, 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, 10.1007/s10334-019-00823-6, 2020.01, 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% volume, respectively). Two-degree components to simulate cell edema were also developed by adjusting the diameter without changing number (17% and 40% 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% 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%. Discussion: A phantom simulating the diffusion restriction correlating with cell density and size could be developed..
15. Takashi Shirasaka, Michinobu Nagao, Yuzo Yamasaki, Tsukasa Kojima, Masatoshi Kondo, Hiroshi Hamasaki, Takeshi Kamitani, Toyoyuki Kato, Yoshiki Asayama, 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, Journal of computer assisted tomography, 10.1097/RCT.0000000000000951, 44, 1, 7-12, 2020.01, 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..
16. W. Panyarak, T. Chikui, K. Tokumori, Y. Yamashita, T. Kamitani, O. Togao, K. Yoshiura, Utility of a diffusion kurtosis model in the differential diagnosis of orofacial tumours, Clinical Radiology, 10.1016/j.crad.2020.01.008, 2020.01, AIM: To compare the goodness of fit and correlations between diffusion kurtosis imaging (DKI) and a mono-exponential (ME) model, to compare the corrected apparent diffusion coefficient (Dapp) and apparent kurtosis (Kapp) of the DKI model, and the apparent diffusion coefficient (ADC) of the ME model among the various orofacial lesions, and to evaluate the diagnostic performances between the two models. MATERIALS AND METHODS: A total of 100 orofacial lesions underwent echo-planar diffusion magnetic resonance imaging (MRI) with four b-values. The goodness of fit was evaluated using Akaike information criterion. The correlations of the diffusion-derived parameters were evaluated. The diagnostic performance was analysed by receiver operating characteristics (ROC). RESULTS: The DKI model showed a significantly better goodness of fit than the ME model (p<0.0001). The Kapp had a strongly negative correlation with the Dapp (ρ=–0.749) and ADC (ρ=–0.938). A strongly positive correlation existed between the Dapp and ADC (ρ=0.906). All parameters differed significantly between benign tumours and malignant tumours (p<0.05). In differentiating benign tumours from the malignant tumours, the AUC of Dapp (0.871) was larger than that of ADC (0.805); however, a significant difference was not found (p=0.102). CONCLUSION: The DKI model had better goodness of fit than the ME model. Furthermore, the Dapp and Kapp were also characteristic for each pathological category; however, the DKI model did not yield a significantly higher diagnostic performance than the ME model, which might be related to the high correlation among the diffusion-derived parameters and wide variation among categories..
17. Masateru Kawakubo, Yuzo Yamasaki, Takeshi Kamitani, Koji Sagiyama, Yuko Matsuura, Takuya Hino, Kohtaro Abe, Kazuya Hosokawa, Hidetake Yabuuchi, Hiroshi Honda, 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, European Radiology, 10.1007/s00330-019-6008-3, 29, 9, 4583-4592, 2019.09, 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%. Results: ROC analysis revealed the optimal cutoffs of strains (GAS, LS, CS, and RS) for identifying improved patients with mPAP < 30 mmHg (cutoff (%) = − 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% (cutoff (%) = − 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..
18. Takamitsu Okada, Hidehiko Yuge, Takeshi Kamitani, Takahiro Senju, Naohide Takeuchi, Koji Sagiyama, naoya kozono, Yoshitaka Nakanishi, Hiroshi Honda, Yasuharu Nakashima, Evaluation of humeral head cartilage using magnetic resonance imaging T1 rho mapping for patients with small-to-medium rotator cuff tears
A pilot study, Journal of Orthopaedic Science, 10.1016/j.jos.2018.10.002, 24, 2, 258-262, 2019.03, Background: It is unclear whether smaller rotator cuff tears cause cartilage degeneration. This study was designed to detect early humeral head cartilage degeneration in patients with small-to-medium cuff tears using magnetic-resonance-imaging T1 rho mapping. Methods: Five male and 5 female volunteers without shoulder symptoms (control group) and 5 male and 5 female patients with small-to-medium (<3 cm) rotator cuff tears underwent 3.0-T magnetic resonance imaging of a single shoulder. T1 rho values of the humeral head cartilage were measured and analyzed. Results: The total mean T1 rho value was 40.4 ± 3.4 ms for the control group and 45.0 ± 5.3 ms for the patient group. In the control group, the T1 rho values in the inferior articular cartilage were significantly higher than those in the superior and middle articular cartilage. In the patient group, there was no significant difference between all regions. A comparison between the patient and control groups showed that the mean T1 rho values in the superior-to-middle articular cartilage were significantly higher for the patient group than for the control group. However, in the inferior articular cartilage, there was no significant difference between both groups. Conclusions: This study showed the possibility of early cartilage degenerative changes in the superior-to-middle humeral head articular cartilage of patients with small-to-medium rotator cuff tears..
19. Takashi Shirasaka, Michinobu Nagao, Yuzo Yamasaki, Tsukasa Kojima, Masatoshi Kondo, Yamato Shimomiya, Takeshi Kamitani, Hiroshi Honda, Feasible scan timing for 320-row coronary CT angiography generated by the time to peak in the ascending aorta, Clinical Imaging, 10.1016/j.clinimag.2019.01.005, 54, 153-158, 2019.03, 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% vs. 61.5%, 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..
20. Takeshi Kamitani, Hidetake Yabuuchi, Yoshihide Kanemaki, Mitsuhiro Tozaki, Tetsuo Sonomura, Waka Mizukoshi, Waka Nakata, Taro Shimono, Misugi Urano, Toshiko Yamano, Fumi Kato, Megumi Kuchiki, Nobuyuki Shiragami, Hisami Yanagita, Eisuke Katsuda, Masako Kataoka, Ken Yamaguchi, Takuro Horikoshi, Tatsuya Gomi, Miwako Nozaki, Motoi Shiotani, Maki Amano, Hirokazu Saigusa, Shunichi Sadaoka, Hisashi Kamiya, Makoto Kubo, Nami Yamashita, Hidetaka Yamamoto, Hiroshi Honda, Effects of menstrual cycle on background parenchymal enhancement and detectability of breast cancer on dynamic contrast-enhanced breast MRI
A multicenter study of an Asian population, European Journal of Radiology, 10.1016/j.ejrad.2018.11.025, 110, 130-135, 2019.01, Purpose: To evaluate the effect of the menstrual cycle on BPE and cancer detectability in an Asian population. Material and methods: 266 premenopausal patients with regular menstrual cycles from 24 centers were included, and 176 of them were diagnosed by pathology as having breast cancer. Thirty-five patients were examined in the menstrual phase (days 1–4), 105 in the proliferative phase (days 5–14), and 126 in the secretory phase (days 15–30). Measurement of the following signal intensities (SIs) were obtained: breast tissue on the unaffected side on a pre-contrast image (SI1) and an early-phase image (SI2); the SIs of breast tissue on the affected side on a pre-contrast image (SI3) and an early-phase image (SI4); and the SIs of breast cancer on a pre-contrast image (SI5) and an early-phase image (SI6). We calculated the BPE ratio, i.e., (SI2– SI1)/SI1 and the cancer/background enhancement ratio (C/B) ratio, i.e., (SI6– SI5) / (SI4– SI3). The BPE was classified as minimal, mild, moderate, or marked, and the cancer detectability was classified as excellent, good, or poor independently by two radiologists. Results: The average C/B ratio was 20.1, 15.7, and 9.1 at the menstrual, proliferative, and secretory phases (p < 0.001). BPE was determined as moderate or marked in 0% and 5.4% at the menstrual phase, 10.3% and 11.0% at the proliferative phase, and 17.5% and 21.7% at the secretory phase by the two observers, respectively (p = 0.01, p = 0.01). The detectability of breast cancer was classified as poor in 0% and 0%, 1.4% and 13.0%, and 8.0% and 22.1% at the menstrual, proliferative, and secretory phases by the two observers, respectively (p = 0.07, p = 0.02). Conclusion: The menstrual phase and the proliferative phase seem to be suitable for breast MRI of Asian women..
21. Akira Haro, Sho Wakasu, Kazuki Takada, Atsushi Osoegawa, Takeshi Kamitani, Tetsuzo Tagawa, Masaki Mori, Pulmonary metastasis presenting as a ground glass opacity-like lesion with a thin-walled cavity
A case report, International Journal of Surgery Case Reports, 10.1016/j.ijscr.2019.06.030, 60, 287-290, 2019, Introduction: Most of pulmonary metastases present as well-defined solid and round nodules. Here we report a case of a pulmonary metastasis presenting as a ground glass opacity (GGO)-like lesion with a thin-walled cavity and lymph node metastasis of tongue cancer. Case presentaion: A 22-year-old man was referred to our department for surgical diagnosis and treatment for a GGO-like pulmonary nodule with a thin-walled cavity in the right lower lobe. He had a history of surgical resection for tongue cancer. The size of the GGO-like lesion with a thin-walled cavity in the center gradually increased. A right lower lobectomy and hilar lymphadenectomy were performed. Postoperative pathology revealed the lesion as pulmonary metastasis and hilar lymph node metastasis of tongue cancer. Discussion: Our case report of pulmonary metastasis of tongue cancer is rare from the viewpoint of pulmonary GGO-like lesions with a following thin-walled cavity and hilar lymph node metastasis. The positron emission tomography/computed tomography (PET/CT) examination was useful to show right hilar lymph node metastasis. Conclusion: It is important to make a differential diagnosis of from the pulmonary nodule in case of a GGO-like lesion with a thin-walled cavity..
22. Gouji Toyokawa, Yuichi Yamada, Tetsuzo Tagawa, Takeshi Kamitani, Yuzo Yamasaki, Mototsugu Shimokawa, Yoshinao Oda, Yoshihiko Maehara, Computed tomography features of resected lung adenocarcinomas with spread through air spaces, Journal of Thoracic and Cardiovascular Surgery, 10.1016/j.jtcvs.2018.04.126, 156, 4, 1670-1676.e4, 2018.10, 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%) 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..
23. Yuzo Yamasaki, Satoshi Kawanami, Takeshi Kamitani, Koji Sagiyama, Seitaro Shin, Takuya Hino, Hazumu Nagata, Hidetake Yabuuchi, Michinobu Nagao, Hiroshi Honda, Patient-related factors influencing detectability of coronary arteries in 320-row CT angiography in infants with complex congenital heart disease, International Journal of Cardiovascular Imaging, 10.1007/s10554-018-1363-8, 34, 9, 1485-1491, 2018.09, 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..
24. Yuzo Yamasaki, Satoshi Kawanami, Takeshi Kamitani, Koji Sagiyama, Seitaro Shin, Takuya Hino, Kenichiro Yamamura, Hidetake Yabuuchi, Michinobu Nagao, Hiroshi Honda, Free-breathing 320-row computed tomographic angiography with low-tube voltage and hybrid iterative reconstruction in infants with complex congenital heart disease, Clinical Imaging, 10.1016/j.clinimag.2018.02.008, 50, 147-156, 2018.07, 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% for intracardiac cardiovascular malformations, 99.8% for extracardiac cardiovascular malformations, and 100% 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..
25. Yuzo Yamasaki, Satoshi Kawanami, Takeshi Kamitani, Koji Sagiyama, Ichiro Sakamoto, Hiasa Ken-Ichi, Hidetake Yabuuchi, Michinobu Nagao, Hiroshi Honda, 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, International Journal of Cardiovascular Imaging, 10.1007/s10554-018-1297-1, 34, 6, 931-937, 2018.06, 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..
26. Kamitani T, Yamasaki Y, Asayama Y, Sagiyama K, Hino T, Yoshitake T, Yabuuchi H, Ohga S, Yasumatasu R, Honda H. , Evaluation of the origin of feeding arteries in recurrent tongue cancers treated with intra-arterial infusion chemotherapy., Intervent Radiol, 3, 3, 110-114, 2018.03.
27. Yabuuchi H, Kawanami S, Iwama E, Okamoto I, Kamitani T, Sagiyama K, Yamasaki Y, Honda H, 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, RADIOLOGY, 10.1148/radiol.2017162204, 286, 2, 685-695, 2018.02.
28. Mikayama R, Yabuuchi H, Sonoda S, Kobayashi K, Nagatomo K, Kimura M, Kawanami S, Kamitani T, Kumazawa S, Honda H, Comparison of intravoxel incoherent motion diffusion-weighted imaging between turbo spin-echo and echo-planar imaging of the head and neck, EUROPEAN RADIOLOGY, 10.1007/s00330-017-4990-x, 28, 1, 316-324, 2018.01.
29. Wannakamon Panyarak, Toru Chikui, Yasuo Yamashita, Takeshi Kamitani, Kazunori Yoshiura, Image Quality and ADC Assessment in Turbo Spin-Echo and Echo-Planar Diffusion-Weighted MR Imaging of Tumors of the Head and Neck, Academic Radiology, 10.1016/j.acra.2018.11.016, 2018.01, Rationale and Objectives: We aimed to compare the distortion ratio (DR), signal-to-noise ratio (SNR), and contrast-to-noise ratio (CNR) between turbo spin-echo (TSE)-diffusion-weighted imaging (DWI) and echo-planar imaging (EPI)-DWI of the orofacial region and prove the usefulness of TSE-DWI for the differential diagnosis of orofacial lesions. Materials and methods: The DR, SNR, and CNR of both sequences were compared in 42 cases. Then, the apparent diffusion coefficient (ADC) of various orofacial lesions obtained by TSE-DWI was investigated in 143 lesions. Results: In the first study, 38 of 42 cases were analyzed. TSE-DWI showed a significantly lower DR (p < 0.05) and higher SNR and CNR than EPI-DWI (p < 0.05), indicating the superiority of TSE-DWI. In the second study, 114 cases (79.3%) were successfully analyzed. When lesions were divided into cysts, benign tumors, squamous cell carcinoma, malignant lymphoma, and other malignant tumors (OT), significant differences were observed in all pairs of lesions (p < 0.05) except squamous cell carcinoma and OT (p = 0.877). The area under the curve for distinguishing benign from malignant tumors was 0.80 with a cutoff ADC of 1.29 × 10-3 mm²/s. Conclusion: TSE-DWI produced better quality images than EPI-DWI. TSE-DWI yields the high possibility of obtaining ADC in the orofacial region, and this value was considered useful for the differential diagnosis of orofacial lesions..
30. Nagao Michinobu, Yamasaki Yuzo, Satoshi Kawanami, Kamitani Takeshi, Sagiyama Koji, Taiki Higo, Ide Tomomi, Takemura A, Ishizaki U, Fukushima K, Watanabe Yuji, Hiroshi Honda, Quantification of myocardial oxygenation in heart failure using blood-oxygen-level-dependent T2* magnetic resonance imaging: Comparison with cardiopulmonary exercise test, Magnetic Resonance Imaging, 39, 138-143, 2017.06.
31. Toyokawa, Gouji; Takada, Kazuki; Okamoto, Tatsuro; Kawanami, Satoshi; Kozuma, Yuka; Matsubara, Taichi; Haratake, Naoki; Takamori, Shinkichi; Akamine, Takaki; Katsura, Masakazu; Yamada, Yuichi; Shoji, Fumihiro; Baba, Shingo; Kamitani, Takeshi; Oda, Yoshinao; Honda, Hiroshi; Maehara, Yoshihiko, Relevance Between Programmed Death Ligand 1 and Radiologic Invasiveness in Pathologic Stage I Lung Adenocarcinoma, Ann Thorac Surg, 10.1016/j.athoracsur.2016.12.025, 103, 6, 1750-1757, 2017.06.
32. Nagao Michinobu, Yamasaki Yuzo, Kamitani Takeshi, Satoshi Kawanami, Kondo M, Sonoda H, Fujioka T, Honda Hiroshi, Geometrical characteristics of aortic root and left ventricular dysfunction in aortic stenosis: quantification of 256-slice coronary CT angiography, Heart Vessels, 32, 5, 558-565, 2017.05.
33. Yabuuchi H, Satoshi Kawanami, Kamitani Takeshi, Matsumura T, Yamasaki Yuzo, Junji Morishita, Hiroshi Honda, Detectability of BI-RADS category 3 or higher breast lesions and reading time on mammography: comparison between 5-MP and 8-MP LCD monitors, Acta Radiol, 58, 4, 403-407, 2017.04.
34. Yamasaki Yuzo, Nagao Michinobu, Satoshi Kawanami, Kamitani Takeshi, Sagiyama Koji, Yamanouchi Torahiko, Sakamoto Ichiro, Kenichiro Yamamura, Yabuuchi H, Hiroshi Honda, One-stop shop assessment for atrial septal closure using 256-slice coronary CT angiography, Eur Radiol, 27, 2, 697-704, 2017.02.
35. Yamasaki Yuzo, Nagao Michinobu, Abe K, Hosokawa K, Satoshi Kawanami, Kamitani Takeshi, Yamanouchi Torahiko, Horimoto K, Yabuuchi H, Hiroshi Honda, Balloon pulmonary angioplasty improves interventricular dyssynchrony in patients with inoperable chronic thromboembolic pulmonary hypertension: a cardiac MR imaging study, Int J Cardiovasc Imaging, 33, 2, 229-239, 2017.02.
36. Nagao Michinobu, Yamasaki Yuzo, Abe K, Hosokawa K, Satoshi Kawanami, Kamitani Takeshi, Yamanouchi Torahiko, Yabuuchi H, Fukushima K, Hiroshi Honda, Energy efficiency and pulmonary artery flow after balloon pulmonary angioplasty for inoperable, chronic thromboembolic pulmonary hypertension: Analysis by phase-contrast MRI, Eur J Radiol , 87, 99-104, 2017.02.
37. Yabuuchi H, Satoshi Kawanami, Kamitani Takeshi, Yonezawa Masato, Yamasaki Yuzo, Yamanouchi T, Nagao Michinobu, Tatsuro Okamoto, Hiroshi Honda, Prediction of post-operative pulmonary function after lobectomy for primary lung cancer: A comparison among counting method, effective lober volume, and lobar collapsibility using inspiratory/expiratory CT, Eur J Radiol, 85, 11, 1956-1962, 2016.11.
38. Yamasaki Yuzo, Nagao Michinobu, Kamitani Takeshi, Yamanouchi Torahiko, Satoshi Kawanami, Kenichiro Yamamura, Sakamoto Ichiro, Yabuuchi H, Hiroshi Honda, Clinical impact of left ventricular eccentricity index using cardiac MRI in assessment of right ventricular hemodynamics and myocardial fibrosis in congenital heart disease, Eur Radiol, 26, 10, 3617-3625, 2016.10.
39. Nagao Michinobu, Yamasaki Yuzo, Kamitani Takeshi, Satoshi Kawanami, Sagiyama Koji, Yamanouchi Torahiko, Shimomiya Yamato, Tetsuya Matoba, Yasushi Mukai, Keita Odashiro, Shingo Baba, Yasuhiro Maruoka, Kitamura Y, Akihiro Nishie, Honda Hiroshi, Quantification of coronary flow using dynamic angiography with 320-detector row CT and motion coherence image processing: Detection of ischemia for intermediate coronary stenosis, Eur J Radiol, 85, 5, 996-1003, 2016.05.
40. Kamitani Takeshi, Satoshi Kawanami, Asayama Yoshiki, Matsuo Yoshio, Yonezawa Masato, Yuzo Yamasaki, Nagao Michinobu, Yamanouchi T, Yabuuchi Hidetake, Katsumasa Nakamura, Torahiko Nakashima, Honda Hiroshi, Feeding Arteries of Primary Tongue Cancers on Intra-arterial Infusion Chemotherapy, Cardiovasc Intervent Radiol, 10.1007/s00270-015-1159-3, 39, 2, 227-232, 2016.02.
41. Sakai N, Yabuuchi Hidetake, Kondo M, Kojima T, Nagatomo T, Satoshi Kawanami, Kamitani Takeshi, Yonezawa Masato, Nagao Michinobu, Honda Hiroshi, Volumetric measurement of artificial pure ground-glass nodules at low-dose CT: Comparison s between hybrid iterative reconstruction and filtered back projection, Eur J Radiol, 84, 12, 2654-2662, 2015.12.
42. Yabuuchi Hidetake, Matsuo Yoshio, Koichiro Abe, Shingo Baba, Sunami Shunya, Kamitani Takeshi, Yonezawa Masato, Yamasaki Yuzo, Satoshi Kawanami, Nagao Michinobu, Tatsuro Okamoto, Katsumasa Nakamura, Yamamoto H, Masayuki Sasaki, Honda Hiroshi, Anterior mediastinal solid tumours in adults: characterization using dynamic contrast-enhanced MRI, diffuseion-weighted MRI, and FDG-PET/CT, Clin Radiol, 70, 11, 1289-1298, 2015.11.
43. Sakai N, Yabuuchi Hidetake, Kondo M, Matsuo Yoshio, Kamitani Takeshi, Nagao Michinobu, Jinnouchi Mikako, Yonezawa Masato, Kojima T, Yano Y, Honda Hiroshi, Low-dose CT screening using hybrid interactive reconstruction: confidence rating of diagnoses of simulated lesions other than lung cancer, Br J Radiol, 88, 1053, 20150159, 2015.09.
44. Tadamasa Yoshitake, Yoshiyuki Shioyama, Asai K, Katsumasa Nakamura, Tomonari Sasaki, Ohga Saiji, Kamitani Takeshi, Yamaguchi T, Ohshima K, Matsumoto K, Satoshi Kawanami, Honda Hiroshi, Impact of Interstitial Changes on Radiation Pneumonitis After Stereotactic Body Radiation Therapy for Lung Cancer, Anticancer Res, 35, 9, 4909-4913, 2015.09.
45. Toru Chikui, Kitamoto Erina, Yukiko Nishioka Kami, Kawano S, Kobayashi K, Kamitani Takeshi, Obara M, Kazunori Yoshiura, Dynamic contrast-enhanced MRI of oral squamous cell carcinoma: a prelim study of the correlations between quantitative parameters and the clinical stage, Br J Radiol, 88, 1050, 20140814, 2015.06.
46. Nagao Michinobu, Yamasaki Yuzo, Yonezawa Masato, Matsuo Yoshio, Kamitani Takeshi, Kenichiro Yamamura, Sakamoto Ichiro, Abe Kohtaro, Satoshi Kawanami, Honda Hiroshi, Interventricular dyssynchrony using tagging magnetic resonance imaging predicts right ventricular dysfunction in adult congenital heart disease, Congenit Heart Dis, 10, 3, 271-280, 2015.05.
47. Nagao Michinobu, Shingo Baba, Yonezawa Masato, Yamasaki Yuzo, Kamitani Takeshi, Satoshi Kawanami, Yasushi Mukai, Taiki Higo, Yabuuchi H, Sunagawa K, Honda Hiroshi, Prediction of adverse cardiac events in dilated cardiomyopathy using cardiac T2* MRI and MIBG scintigraphy., Int J Cardiovasc Imaging , 31, 2, 399-407, 2015.02.
48. Yamasaki Yuzo, Nagao Michinobu, Kenichiro Yamamura, Yonezawa Masato, Matsuo Yoshio, Satoshi Kawanami, Kamitani Takeshi, Higuchi Ko, Sakamoto Ichiro, Yuichi Shiokawa, Hidetake Yabuuchi, Honda Hiroshi, Quantitative assessment of right ventricular function and pulmonary regurgitation in surgically repaired tetralogy of Fallot using 256-slice CT: comparison with 3-Tesla MRI, Eur Radiol, 10.1007/s00330-014-3344-1, 24, 12, 3289-3299, 2014.12.
49. Nagao Michinobu, Yamasaki Yuzo, Yonezawa Masato, Matsuo Yoshio, Kamitani Takeshi, Kenichiro Yamamura, Sakamoto Ichiro, Abe Kohtaro, Satoshi Kawanami, Honda Hiroshi, Geometrical Characteristics of Left Ventricular Dyssynchrony in Advanced Heart Failure Myocardial Strain Analysis by Tagged MRI, Congenit Heart Dis, 55, 6, 512-518, 2014.11.
50. Kamitani Takeshi, Matsuo Yoshio, Yabuuchi Hidetake, Nobuhiro Fujita, Nagao Michinobu, Satoshi Kawanami, Yonezawa Masato, Yuzo Yamasaki, Tokunaga Kitao Eriko, Makoto Kubo, Hidetaka Yamamoto, Honda Hiroshi, Differentiation between benign phyllodes tumors and fibroadenomas of the breast on MR imaging, Eur J Radiol, 83, 8, 1344-1349, 2014.08.
51. Yano Yuki, Hidetake Yabuuchi, Tanaka N, Morishita Junji, Akasaka T, Yoshio Matsuo, Sunami Shunya, Takeshi Kamitani, Mikako Jinnomuchi, Yuzo Yamasaki, Michinobu Nagao, Masayuki Sasaki, Detectability of simulated interstitial pneumonia on chest radiographs: comparison between irradiation side sampling indirect flat-panel detector and computed radiography, Eur J Radiol , 10.1259/bjr.20140075, 87, 1040, 2050-2054, 2014.08.
52. Yabuuchi Hidetake, Matsuo Yoshio, Kamitani Takeshi, Jinnouchi Mikako, Yonezawa Masato, Yamasaki Yuzo, Nagao Michinobu, Satoshi Kawanami, Tatsuro Okamoto, Masayuki Sasaki, Honda Hiroshi, 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) moitors, Acta Radiol, 56, 8, 943-949, 2014.08.
53. Yabuuchi Hidetake, Matsuo Yoshio, Hiroshi Tsukamoto, Takahiko Horiuchi, Sunami Shunya, Kamitani Takeshi, Jinnouchi Mikako, Nagao Michinobu, koichi akashi, Honda Hiroshi, Evaluation of the extent of ground-glass opacity on high-resolution CT in patients with interstitial pneumonia associated with systemic sclerosis: Comparison between quantitative and qualitative analysis, Clin Radiol, 69, 7, 758-764, 2014.07.
54. Nagao Michinobu, Matsuo Yoshio, Kamitani Takeshi, Yonezawa Masato, Yamasaki Yuzo, Satoshi Kawanami, Abe Kohtaro, Yasushi Mukai, Higo Taiki, Hidetake Yabuuchi, Atsushi Takemura, Takashi Yoshiura, Kenji Sunagawa, Honda Hiroshi, Quantification of myocardial iron deficiency in nonischemic heart failure by cardiac T2* magnetic resonance imaging, Am J Cardiol, 113, 6, 1024-1030, 2014.03.
55. Masamitsu Hatakenaka, Katsumasa Nakamura, Yabuuchi Hidetake, Yoshiyuki Shioyama, Matsuo Yoshio, Kamitani Takeshi, Yonezawa Masato, Takashi Yoshiura, Torahiko Nakashima, Mori Mitsuru, Honda Hiroshi, Apparent diffusion coefficient is a prognostic factor of head and neck squamous cell carcinoma treated with radiotherapy, Jpn J Radiol, 32, 2, 80-89, 2014.02.
56. Yano Yuki, Hidetake Yabuuchi, Tanaka N, Morishita Junji, Akasaka T, Yoshio Matsuo, Sunami Shunya, Takeshi Kamitani, Mikako Jinnomuchi, Yuzo Yamasaki, Michinobu Nagao, Masayuki Sasaki, Detectability of simulated pulmonary nodules on chest radiographs: Comparison between irradiation side sampling indirect flat-panel detector and computed radiography, Eur J Radiol , 82, 11, 2050-2054, 2013.11.
57. Kamitani Takeshi, Matsuo Yoshio, Yabuuchi Hidetake, Nobuhiro Fujita, Nagao Michinobu, Jinnouchi Mikako, Yonezawa Masato, Yuzo Yamasaki, Tokunaga Kitao Eriko, Makoto Kubo, Hidetaka Yamamoto, Takashi Yoshiura, Honda Hiroshi, Correlations between apparent diffusion coefficient values and prognostic factors of breast cancer, Magn Reson Med Sci, 12, 3, 193-199, 2013.09.
58. Yonezawa Masato, Nagao Michinobu, Abe Koichiro, Matsuo Yoshio, Baba Shingo, Kamitani Takeshi, Isoda Takuro, Maruoka Yasuhiro, Jinnouchi Mikako, Yamasaki Yuzo, Abe Kohtaro, Higo Taiki, Takashi Yoshiura, Honda Hiroshi, Relationship between impaired cardiac sympathetic activity ad spatial dyssynchrony in patients with non-ischeic heart failure: assessment by MIBG scintigraphy and tagged MRI, J Nucl Cardiol, 20, 4, 600-608, 2013.08.
59. Ko Higuchi, Michinobu Nagao, Yoshio Matsuo, Sunami Shunya, Takeshi Kamitani, Mikako Jinnomuchi, Yuzo Yamasaki, Masato Yonezawa, Hidetake Yabuuchi, Masamitsu Hatakenaka, Hiroshi Honda, Detection of ground-glass opacities by use of hybrid iterative reconstruction (iDose) and low-dose 256-section computed tomography: a phantom study, Radiol Phys Technol, 6, 2, 299-304, 2013.07.
60. Kamitani Takeshi, Hatakenaka Masamitsu, Yabuuchi Hidetake, Matsuo Yoshio, Nobuhiro Fujita, Jinnouchi Mikako, Nagao Michinobu, Shirahane Kengo, Tokunaga Kitao Eriko, Honda Hiroshi, Detection of axillary node metastasis using diffusion-weighted MRI in breast cancer, Clin Imaging, 37, 1, 56-61, 2013.01.
61. Higuchi Ko, Nagao Michinobu, Matsuo Yoshio, Kamitani Takeshi, Yonezawa Masato, Jinnouchi Mikako, Yamasaki Yuzo, Abe Koichiro, Baba Shingo, Mukai Yasushi, Higo Taiki, Sunagawa Kenji, Honda Hiroshi, Evaluation of chronic ischemic heart disease with myocardial perfusion and regional contraction analysis by contrast-enhanced 256-MSCT, Jpn J Radiol, 31, 1, 123-132, 2012.02.
62. Hatakenaka M, Shioyama Y, Nakamura K, Yabuuchi H, Matsuo Y, Sunami S, Kamitani T, Yoshiura T, Nakashima T, Nishikawa K, Honda H, Apparent diffusion coefficient calculated with relatively high b-values correlates with local failure of head and neck squamous cell carcinoma treated with radiotherapy, AJNR Am J Neuroradiol, 32, 10, 1904-10, 2011.11.
63. Yabuuchi H, Hatakenaka M, Takayama K, Matsuo Y, Sunami S, Kamitani T, Jinnouchi M, Sakai S, Nakanishi Y, Honda H, Non-small cell lung cancer: detection of early response to chemotherapy by using contrast-enhanced dynamic and diffusion-weighted MR imaging, Radiology, 261, 2, 598-604, 2011.11.
64. Hatakenaka M, Nakamura K, Yabuuchi H, Shioyama Y, Matsuo Y, Ohnishi K, Sunami S, Kamitani T, Setoguchi T, Yoshiura T, Nakashima T, Nishikawa K, Honda H, Pretreatment apparent diffusion coefficient of the primary lesion correlates with local failure in head-and-neck cancer treated with chemoradiotherapy or radiotherapy, Int J Radiat Oncol Biol Phys, 81, 2, 339-45, 2011.10.
65. Kamitani T, Yabuuchi H, Matsuo Y, Setoguchi T, Sakai S, Okafuji T, Sunami S, Hatakenaka M, Ishii N, Kubo M, Tokunaga E, Yamamoto H, Honda H, Diagnostic performance in differentiation of breast lesion on digital mammograms: comparison among hard-copy film, 3-megapixel LCD monitor, and 5-megapixel LCD monitor., Clin Imaging, 35, 5, 341-5, 2011.09.
66. Yabuuchi H, Matsuo Y, Tsukamoto H, Sunami S, Kamitani T, Sakai S, Hatakenaka M, Nagafuji K, Horiuchi T, Harada M, Akashi K, Honda H, Correlation between pretreatment or follow-up CT findings and therapeutic effect of autologous peripheral blood stem cell transplantation for interstitial pneumonia associated with systemic sclerosis, Eur J Radiol, 79, 2, e74-9, 2011.08.
67. Kamitani T, Yabuuchi H, Soeda H, Matuso Y, Okafuji T, Sakai S, Setoguchi T, Hatakenaka M, Ishii N, Honda H, Detection of breast cancer by soft-copy reading of digital mammograms: comparison between a routine image-processing parameter and high contrast parameters, Acta Radiol , 51, 1, 15-20, 2010.02.
68. Hatakenaka M, Yabuuchi H, Matsuo Y, Okafuji T, Kamitani T, Setoguchi T, Nishikawa K, Honda H, Effect of passive muscle length change on apparent diffusion coefficient: detection with clinical MR imaging, Magn Reson Med Sci, 7, 2, 59-63, 2008.07.
69. Kamitani T, Yabuuchi H, Soeda H, Matsuo Y, Okafuji T, Setoguchi T, Sakai S, Hatakenaka M, Ishii N, Honda H, Optimal gradation processing parameter for soft-copy reading of digital mammogram: comparison between the parameter recommended for hard-copy and other parameters, Eur J Radiol, 66, 2, 309-312, 2008.05.
70. Hatakenaka M, Soeda H, Yabuuchi H, Matsuo Y, Kamitani T, Oda Y, Tsuneyoshi M, Honda H, Apparent diffusion coefficients of breast tumors: clinical application, Magn Reson Med Sci, 7, 1, 23-29, 2008.05.
71. Hatakenaka M, Matsuo Y, Setoguchi T, Yabuuchi H, Okafuji T, Kamitani T, Nishikawa K, Honda H, Alteration of proton diffusivity associated with passive muscle extension and contraction, J Magn Reson Imaging, 27, 4, 932-937, 2008.04.
72. Sakai S, Yabuuchi H, Matsuo Y, Okafuji T, Kamitani T, Honda H, Yamamoto K, Fujiwara K, Sugiyama N, Doi K, Integration of temporal subtraction and nodule detection system for digital chest radiographs into picture archiving and communication system (PACS): four-year experience, J Digit Imaging, 21, 1, 91-98, 2008.03.
73. Kamitani T, Yabuuchi H, Soeda H, Matsuo Y, Okafuji T, Sakai S, Furuya A, Hatakenaka M, Ishii N, Honda H, Detection of masses and microcalcifications of breast cancer on digital mammograms: comparison among hard-copy film, 3-megapixel liquid crystal display (LCD) monitor, and 5-megapixel LCD monitor: an observer performance study, European Radiology, 17, 5, 1365-1371, 2007.05.