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Faculty of Medicine School of Medicine Department of Medicine of Pathophysiological Diagnosis and Therapy, Radiology |
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Assistant Professor |
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Related SDGs |
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TERADA Tamasa
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Papers 【 display / non-display 】
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Yamazaki K., Nishii R., Mizutani Y., Makishima H., Kaneko T., Isobe Y., Terada T., Tamura K., Imabayashi E., Tani T., Kobayashi M., Wakatsuki M., Tsuji H., Higashi T.
European Journal of Nuclear Medicine and Molecular Imaging 50 ( 2 ) 581 - 592 2023.1
Language：English Publishing type：Research paper (scientific journal) Publisher：European Journal of Nuclear Medicine and Molecular Imaging
Background: There is currently no established imaging method for assessing liver reserve capacity prior to carbon-ion radiotherapy (CIRT) for liver tumors. In order to perform safe CIRT, it is essential to estimate the post-therapeutic residual reserve capacity of the liver. Purpose: To evaluate the ability of pre-treatment 99mTc-galactosyl human serum albumin (99mTc-GSA) scintigraphy to accurately estimate the residual liver reserve capacity in patients treated with CIRT for liver tumors. Materials and methods: This retrospective study evaluated patients who were performed CIRT for liver tumors between December 2018 and September 2020 and underwent 99mTc-GSA scintigraphy before and 3 months after CIRT, and gadolinium ethoxybenzyl diethylenetriamine pentaacetic acid (Gd-EOB-DTPA)-enhanced MRI within 1 month before CIRT were evaluated. The maximal removal rate of 99mTc-GSA (GSA-Rmax) was analyzed for the evaluation of pre-treatment liver reserve capacity. Then, the GSA-Rmax of the estimated residual liver (GSA-RL) was calculated using liver SPECT images fused with the Gd-EOB-DTPA-enhanced MRI. GSA-RL before CIRT and GSA-Rmax at 3 months after CIRT were compared using non-parametric Wilcoxon signed-rank test and linear regression analysis. Results: Overall, 50 patients were included (mean age ± standard deviation, 73 years ± 11; range, 29–89 years, 35 men). The median GSA-RL was 0.393 [range, 0.057–0.729] mg/min, and the median GSA-Rmax after CIRT was 0.369 [range, 0.037–0.780] mg/min (P =.40). The linear regression equation representing the relationship between the GSA-RL and GSA-Rmax after CIRT was y = 0.05 + 0.84x (R2 = 0.67, P <.0001). There was a linear relationship between the estimated and actual post-treatment values for all patients, as well as in the group with impaired liver reserve capacity (y = − 0.02 + 1.09x (R2 = 0.62, P =.0005)). Conclusions: 99mTc-GSA scintigraphy has potential clinical utility for estimating the residual liver reserve capacity in patients undergoing carbon-ion radiotherapy for liver tumors. Trial registration: UMIN000038328, https://center6.umin.ac.jp/cgi-open-bin/ctr/ctr_view.cgi?recptno=R000043545.
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Minako Azuma, Hiroshi Nakada, Mizuki Takei, Keigo Nakamura, Shigehiko Katsuragawa, Norihiro Shinkawa, Tamasa Terada, Rie Masuda, Youhei Hattori, Takakazu Ide, Aya Kimura, Mei Shimomura, Masatsugu Kawano, Kengo Matsumura, Takayuki Meiri, Hidenobu Ochiai, Toshinori Hirai
Emerg Radiol 29 ( 2 ) 317 - 328 2022.4
Language：English Publishing type：Research paper (scientific journal) Publisher：Emergency Radiology
Purpose: The evaluation of all ribs on thin-slice CT images is time consuming and it can be difficult to accurately assess the location and type of rib fracture in an emergency. The aim of our study was to develop and validate a convolutional neural network (CNN) algorithm for the detection of acute rib fractures on thoracic CT images and to investigate the effect of the CNN algorithm on radiologists’ performance. Methods: The dataset for development of a CNN consisted of 539 thoracic CT scans with 4906 acute rib fractures. A three-dimensional faster region-based CNN was trained and evaluated by using tenfold cross-validation. For an observer performance study to investigate the effect of CNN outputs on radiologists’ performance, 30 thoracic CT scans (28 scans with 90 acute rib fractures and 2 without rib fractures) which were not included in the development dataset were used. Observer performance study involved eight radiologists who evaluated CT images first without and second with CNN outputs. The diagnostic performance was assessed by using figure of merit (FOM) values obtained from the jackknife free-response receiver operating characteristic (JAFROC) analysis. Results: When radiologists used the CNN output for detection of rib fractures, the mean FOM value significantly increased for all readers (0.759 to 0.819, P = 0.0004) and for displaced (0.925 to 0.995, P = 0.0028) and non-displaced fractures (0.678 to 0.732, P = 0.0116). At all rib levels except for the 1st and 12th ribs, the radiologists’ true-positive fraction of the detection became significantly increased by using the CNN outputs. Conclusion: The CNN specialized for the detection of acute rib fractures on CT images can improve the radiologists’ diagnostic performance regardless of the type of fractures and reader’s experience. Further studies are needed to clarify the usefulness of the CNN for the detection of acute rib fractures on CT images in actual clinical practice.
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Do TSH, FT3, and FT4 Impact BAT Visualization of Clinical FDG-PET/CT Images? Reviewed
Nishii R, Nagamachi S, Mizutani Y, Terada T, Kiyohara S, Wakamatsu H, Fujita S, Higashi T, Yoshinaga K, Saga T, Hirai T.
Contrast Media & Molecular Imaging 2018 4898365 2018.2
Language：English Publishing type：Research paper (scientific journal)
DOI： 10.1155/2018/4898365
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Prediction of Posthepatectomy Liver Failure Proposed by the International Study Group of Liver Surgery: Residual Liver Function Estimation With 99mTc-Galactosyl Human Serum Albumin Scintigraphy. Reviewed
Mizutani Y, Hirai T, Nagamachi S, Nanashima A, Yano K, Kondo K, Hiyoshi M, Imamura N, Terada T.
Clinical Nuclear Medicine 43 ( 2 ) 77 - 81 2018.2
Language：English Publishing type：Research paper (scientific journal)
Books 【 display / non-display 】
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画像診断
寺田珠沙、長町茂樹、平井俊範（ Role： Joint author）
学研メディカル秀潤社 2017.4
Responsible for pages：595 Language：Japanese Book type：Scholarly book
MISC 【 display / non-display 】
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Azuma M., Nakada H., Takei M., Nakamura K., Katsuragawa S., Shinkawa N., Terada T., Masuda R., Hattori Y., Ide T., Kimura A., Shimomura M., Kawano M., Matsumura K., Meiri T., Ochiai H., Hirai T.
Emergency Radiology 29 ( 2 ) 425 2022.4
Language：English Publishing type：Rapid communication, short report, research note, etc. (scientific journal) Publisher：Emergency Radiology
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虚血性心疾患診断における冠動脈領域別の位相解析指標の有用性の検討
寺田珠沙、長町茂樹、鬼塚久充、水谷陽一、平井俊範、北村和雄
臨床放射線 63 ( 2 ) 185 - 190 2018.2
Language：Japanese Publishing type：Article, review, commentary, editorial, etc. (scientific journal) Publisher：金原出版
Presentations 【 display / non-display 】
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心機能解析ソフトウェアを用いた位相解析指標の虚血診断能の検討
寺田 珠沙
第62回日本核医学会学術総会
Event date： 2022.9.9 - 2022.9.11
Presentation type：Oral presentation (general)
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虚血性心疾患診断における心筋血流SPECTを用いた位相解析の有用性
寺田 珠沙
第35回海の中道RIカンファランス
Event date： 2022.7.9
Presentation type：Oral presentation (invited, special)
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去勢抵抗性前立腺癌骨転移患者におけるRa-223投与後の生存期間に関連するパラメータの検討
木村 綾、寺田珠沙、水谷陽一、榮 建文、岡部 洸、寺田直樹
第192回日本医学放射線学会九州地方会 (WEB)
Event date： 2021.2.7
Language：Japanese Presentation type：Oral presentation (general)
Venue：WEB
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ANN値を用いて心筋虚血診断を行う際の真陽性群と偽陰性群の比較検討
寺田珠沙、長町茂樹、鬼塚久充、水谷陽一、平井俊範
第60回日本核医学会学術総会 (兵庫県神戸市)
Event date： 2020.11.12 - 2020.11.14
Language：Japanese Presentation type：Oral presentation (general)
Venue：兵庫県神戸市
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Comparison of quantitative parameters between bone SPECT and spectral CT in prostate cancer patients with bone metastases
Mizutani Y, Terada T, Hirai T
第79回日本医学放射線学会総会（JRC2020） (WEB)
Event date： 2020.5.15 - 2020.6.14
Language：Japanese Presentation type：Poster presentation
Venue：WEB