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Affiliation |
Faculty of Medicine College Hospital Radiation part |
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Title |
Assistant Professor |
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External Link |
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MASUDA Rie
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Papers 【 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 ) 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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Izumoto S., Abe T., Koroki T., Furukoji E., Masuda R., Ochiai H.
American Journal of Case Reports 23 ( 1 ) e934173 2022.2
Language：English Publishing type：Research paper (scientific journal) Publisher：American Journal of Case Reports
Objective: Rare disease Background: The rupture of an intercostal artery is rare and is usually associated with trauma, neurofibromatosis type 1, or coarctation of the aorta. Transcatheter arterial embolization is a minimally invasive vascular surgical procedure used to control hemorrhage of an intercostal artery. This report describes a case of a 48-year-old man who presented with severe back pain. This was due to a large anterior paravertebral hematoma following the spontaneous rupture of the right 9th intercostal artery. The rupture was successfully managed by transcatheter arterial embolization. Case Report: A 48-year-old man suddenly felt severe back pain while walking. He had no previous medical history and he had not experienced any external injury. On arrival, he was tachycardic and hypertensive. He did not have abnormal physical findings. His chest radiograph, 12-lead electrocardiogram, ultrasonography, and blood test findings were unremarkable. A chest computed tomography scan with contrast media was performed, which revealed a 4.3×2.7×7.0 cm mass, enhanced with contrast media, anterior to the 9th vertebral body. The patient was diagnosed with spontaneous rupture of the right ninth intercostal artery. The lesion was embolized with 8 microcoils. The patient was discharged on the 8th hospital day without complications. Conclusions: This report presents a rare case of the rupture of an intercostal artery in which no cause was identified. It highlights the role of imaging as an important diagnostic tool. Furthermore, this report shows the benefits of the timely use of emergency transcatheter arterial embolization, which in this instance resulted in a successful outcome.
DOI： 10.12659/AJCR.934173
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An adult case of a retroperitoneal isolated enteric duplication cyst with the imaging changes over time. Reviewed International journal
Inomata M, Kai K, Ikeda T, Ichihara A, Masuda R, Kiwaki T, Tanaka H, Kataoka H, Nanashima A
Surgical case reports 7 ( 1 ) 258 2021.12
Language：English Publishing type：Research paper (scientific journal)
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Detection of acute rib fractures on CT images with convolutional neural networks: efect of location and type of fracture and reader's experience Reviewed International journal
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 2021.12
Language：English Publishing type：Research paper (scientific journal)
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Inferior Vena Cava Filter Placement and Removal
Sakae Tatefumi, Furukoji Eiji, Masuda Rie
The Official Journal of the Japanese Society of Interventional Radiology 34 ( 4 ) 284 - 289 2020
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：The Japanese Society of Interventional Radiology
DOI： 10.11407/ivr.34.284
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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Inferior Vena Cava Filter Placement and Removal
Sakae Tatefumi, Furukoji Eiji, Masuda Rie
The Official Journal of the Japanese Society of Interventional Radiology 34 ( 4 ) 284 - 289 2020.4
Language：Japanese Publishing type：Rapid communication, short report, research note, etc. (scientific journal) Publisher：The Japanese Society of Interventional Radiology
DOI： 10.11407/ivr.34.284
Presentations 【 display / non-display 】
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腹腔動脈瘤切除術後のバイパス吻合部に形成された仮性動脈瘤に対しcovered-stentを用いて治療を行った1例
原 卓也、古小路 英二、増田 梨絵、榮 建文、東 美菜子
第44回九州IVR研究会
Event date： 2022.12.17
Language：Japanese Presentation type：Oral presentation (general)
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腫瘍出血を繰り返す転移性肺腫瘍に対して塞栓術でコントロールしている1例
増田梨絵、古小路英二、榮 建文
南九州IVR講演会 2021.3.11
Event date： 2021.3.11
Presentation type：Oral presentation (general)
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右肺静脈瘤の診断にFour-Dimensional CTAが有用であった1例
明利陸征、増田梨絵、古小路英二、榮 建文
第192回日本医学放射線学会九州地方会 2021.2.7
Event date： 2021.2.7
Presentation type：Oral presentation (general)