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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 ) 317 - 328 2022年4月
記述言語：日本語 掲載種別：研究論文（学術雑誌） 出版者・発行元：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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Kawano M, Azuma M, Hattori Y, Ikushima I , Kai K, Higuchi K, Kawano T, Matsumoto F, Uchinokura S, Irisa G, Ohta H, Hirai T
Emerg Radiol 28 ( 3 ) 675 - 678 2021年6月
担当区分：筆頭著者 記述言語：英語 掲載種別：研究論文（学術雑誌） 出版者・発行元：Emergency Radiology
We report the short-term results with aspiration embolectomy using an ACE68 reperfusion catheter to treat patients with acute embolic superior mesenteric artery (SMA) occlusion. Our study included 4 consecutive male patients ranging in age from 72 to 86 years (mean age 79 years). In all patients, the main trunk of the SMA was occluded. The technical success rate was 100% for all procedures. There were no major procedure-related complications. One patient underwent laparotomy with intestinal resection after successful recanalization. No patient reported clinical symptoms of abdominal ischemia at follow-up. Our short-term experience shows that percutaneous aspiration embolectomy using an ACE68 reperfusion catheter is an effective treatment for acute mesenteric ischemia.
DOI： 10.1007/s10140-020-01896-w
その他リンク： https://link.springer.com/article/10.1007/s10140-020-01896-w/fulltext.html
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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年4月
記述言語：英語 掲載種別：速報，短報，研究ノート等（学術雑誌） 出版者・発行元：Emergency Radiology
講演・口頭発表等 【 表示 ／ 非表示 】
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心臓診断について
川野 真嗣
第72回九州MRI研究会
開催年月日： 2023年1月7日
記述言語：日本語 会議種別：口頭発表（一般）
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肺乳頭腺腫の1切除例
中村 咲和、川野 真嗣、下村 明、中田 博、東 美菜子、前田 亮、綾部 貴典、魏 峻洸
第195回日本医学放射線学会九州地方会
開催年月日： 2022年6月18日 - 2022年6月19日
記述言語：日本語 会議種別：口頭発表（一般）
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血清CA19-9高値を示した脾嚢胞の1例
堀之内裕美、新川仁奈子、川野真嗣、榮 建文、福島 剛、今村直哉
第192回日本医学放射線学会九州地方会 2021年2月7日
開催年月日： 2021年2月7日
記述言語：日本語 会議種別：口頭発表（一般）