Faculty Profiles - NISHIMUTA YUSUKE (2025)

  • Extracellular volume fraction determined by equilibrium contrast-enhanced computed tomography: correlation with histopathological findings in gastric cancerReviewedInternational journal

    Yusuke Nishimuta, Daisuke Tsurumaru, Satohiro Kai, Junki Maehara, Yoshiki Asayama, Eiji Oki, Kousei Ishigami

    Japanese Journal of Radiology 41 ( 7 ) 752 - 759 2023.2 ISSN:1867-1071 eISSN:1867-108X

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

    DOI:10.1007/s11604-023-01393-3

    Web of Science

    Scopus

    PubMed

  • 特集1 絶対苦手分野にしない 消化管の画像診断 消化管間質腫瘍(GIST)のすべて

    鶴丸 大介, 井上 明星, 西牟田 雄祐, 南條 勝哉, 石神 康生

    臨床画像 40 ( 11 ) 1302 - 1310 2024.11 ISSN:09111069

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    Publisher:メジカルビュー社

    DOI:10.18885/ci.0000001873

    CiNii Research

  • 特集1 絶対苦手分野にしない 消化管の画像診断 胃癌のCTどこまで読める?

    西牟田 雄祐, 鶴丸 大介, 石神 康生

    臨床画像 40 ( 11 ) 1286 - 1293 2024.11 ISSN:09111069

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    Publisher:メジカルビュー社

    DOI:10.18885/ci.0000001871

    CiNii Research

  • CT colonography has advantages over colonoscopy for size measurement of colorectal polyps

    Tsurumaru, D; Nishimuta, Y; Nanjo, K; Kai, S; Miyasaka, M; Muraki, T; Ishigami, K

    JAPANESE JOURNAL OF RADIOLOGY 42 ( 11 ) 1255 - 1261 2024.11 ISSN:1867-1071 eISSN:1867-108X

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    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 6years 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 10.5mm, 9.2mm, and 8.4mm, 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

  • Esophageal lymphangioma: Endoscopic ultrasound, computed tomography, and magnetic resonance imaging appearance

    Nanjo K., Tsurumaru D., Hirakawa M., Nishimuta Y., Mimori K., Ishigami K.

    Radiology Case Reports 19 ( 11 ) 4841 - 4844 2024.11 ISSN:1930-0433

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    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

  • 特集 これからの胃癌診療 4.胃癌の放射線診断

    西牟田 雄祐, 鶴丸 大介, 甲斐 聖広, 南條 勝哉, 石神 康生

    臨床消化器内科 39 ( 8 ) 872 - 881 2024.7 ISSN:0911601X eISSN:24332488

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    Publisher:日本メディカルセンター

    DOI:10.19020/cg.0000003106

    CiNii Research

  • 特集 悪性リンパ腫の画像診断:間違えやすい疾患との鑑別のポイント 消化管

    南條 勝哉, 西牟田 雄祐, 鶴丸 大介, 鳥巣 剛弘, 石神 康生

    臨床放射線 69 ( 4 ) 473 - 482 2024.7 ISSN:00099252

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    Publisher:金原出版

    DOI:10.18888/rp.0000002708

    CiNii Research

  • CT colonographyを用いた早期大腸癌の深達度診断に関する検討

    鶴丸 大介, 西牟田 雄祐, 南條 勝哉, 甲斐 聖広, 沖 英次, 石神 康生

    日本大腸検査学会雑誌 40 ( 2 ) 61 - 67 2024.6 ISSN:1344-1639

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    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)

  • 特集 非典型症例と類似疾患を知ってCommon Diseaseを極める 3 腹部 ⑰ 消化器▶消化管

    鶴丸 大介, 西牟田 雄祐, 南條 勝哉, 石神 康生

    臨床放射線 68 ( 12 ) 1273 - 1277 2023.12 ISSN:00099252

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    Publisher:金原出版

    DOI:10.18888/rp.0000002549

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  • Clinical significance of dual-energy dual-layer CT parameters in differentiating small-sized gastrointestinal stromal tumors from leiomyomas

    Tsurumaru, D; Nishimuta, Y; Kai, S; Oki, E; Minoda, Y; Ishigami, K

    JAPANESE JOURNAL OF RADIOLOGY 41 ( 12 ) 1389 - 1396 2023.12 ISSN:1867-1071 eISSN:1867-108X

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    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 (≤ 4cm) GISTs from leiomyomas of the stomach. Materials and methods: This retrospective study included 26 SMTs ≤ 4cm 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

  • 小型の消化管間質腫瘍と平滑筋腫の鑑別におけるdual-energy dual-layer CTパラメータの臨床的意義(Clinical significance of dual-energy dual-layer CT parameters in differentiating small-sized gastrointestinal stromal tumors from leiomyomas)

    Tsurumaru Daisuke, Nishimuta Yusuke, Kai Satohiro, Oki Eiji, Minoda Yosuke, Ishigami Kousei

    Japanese Journal of Radiology 41 ( 12 ) 1389 - 1396 2023.12 ISSN:1867-1071

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    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。

  • 特集 癌治療後の局所再発と転移の画像診断 6. 胃

    鶴丸 大介, 西牟田 雄祐, 甲斐 聖広, 石神 康生

    画像診断 43 ( 11 ) A76 - A84 2023.9 ISSN:02850524 eISSN:24321281

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    Publisher:学研メディカル秀潤社

    DOI:10.15105/gz.0000004836

    CiNii Research

  • Clinical significance of dual-energy dual-layer CT parameters in differentiating small-sized gastrointestinal stromal tumors from leiomyomasInvitedReviewedInternational journal

    Daisuke Tsurumaru, Yusuke Nishimuta, Satohiro Kai, Eiji Oki, Yosuke Minoda, Kousei Ishigami

    2023.7

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

  • 平衡相造影CTにより測定した細胞外容積分画 胃癌における病理学組織学的所見との相関(Extracellular volume fraction determined by equilibrium contrast-enhanced computed tomography: correlation with histopathological findings in gastric cancer)

    Nishimuta Yusuke, Tsurumaru Daisuke, Kai Satohiro, Maehara Junki, Asayama Yoshiki, Oki Eiji, Ishigami Kousei

    Japanese Journal of Radiology 41 ( 7 ) 752 - 759 2023.7 ISSN:1867-1071

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    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。

  • 特集 画像診断レポート ここだけは落とせない!主治医に伝えるべきポイント 第5章 消化器 6 消化管腫瘍

    西牟田 雄祐, 鶴丸 大介, 甲斐 聖広, 石神 康生

    臨床放射線 67 ( 11 ) 1389 - 1397 2022.10 ISSN:00099252

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    Publisher:金原出版

    DOI:10.18888/rp.0000002137

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  • 特集 専攻医1年目で知っておきたいCT 14のこと~指導医からのメッセージ~ 指導医が伝えるCT読影のコツ 消化管出血

    鶴丸 大介, 西牟田 雄祐, 甲斐 聖広, 石神 康生

    臨床画像 38 ( 14 ) 144 - 150 2022.10 ISSN:09111069

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    Publisher:メジカルビュー社

    DOI:10.18885/ci.0000001064

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  • 今月の主題 大腸腫瘍診療の最前線 主題 CT colonographyの最前線

    鶴丸 大介, 西牟田 雄祐, 甲斐 聖広, 髙津 憲之, 宮坂 光俊, 村木 俊夫, 上田 真信, 伊牟田 真功, 林 奈留美, 三宅 基隆, 森 一宏, 前田 和弘, 石神 康生

    胃と腸 57 ( 10 ) 1281 - 1289 2022.9 ISSN:05362180 eISSN:18821219

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    Publisher:株式会社医学書院

    DOI:10.11477/mf.1403203001

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  • The Evolving Genomic Landscape of Esophageal Squamous Cell Carcinoma Under ChemoradiotherapyReviewedInternational journal

    Hidenari Hirata, Atsushi Niida, Nobuyuki Kakiuchi, Ryutaro Uchi, Keishi Sugimachi, Takaaki Masuda, Tomoko Saito, Shun-Ichiro Kageyama , Yushi Motomura, Shuhei Ito, Tadamasa Yoshitake, Daisuke Tsurumaru, Yusuke Nishimuta, Akira Yokoyama, Takanori Hasegawa, Kenichi Chiba, Yuichi Shiraishi, Junyan Du, Fumihito Miura, Masaru Morita, Yasushi Toh, Masakazu Hirakawa, Yoshiyuki Shioyama, Takashi Ito, Tetsuo Akimoto, Satoru Miyano, Tatsuhiro Shibata, Masaki Mori, Yutaka Suzuki, Seishi Ogawa, Kousei Ishigami, Koshi Mimori

    Cancer Res. 2021.10

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

    DOI:10.1158/0008-5472.CAN-21-0653

  • Diagnosis of early colorectal cancer invasion depth by quantitative evaluation of the basal indentation in CT colonographyInvitedReviewedInternational journal

    Miyasaka M, Tsurumaru D, Nishimuta Y, Asayama Y, Kawanami S, Oki E, Hirahashi M, Honda H

    Jpn J Radiol. 2016 Dec;34(12):786-794 2016.12

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

  • Differentiation of Early Gastric Cancer with Ulceration and Resectable Advanced Gastric Cancer using Multiphasic Dynamic Multidetector CTInvitedReviewedInternational journal

    DAISUKE TSURUMARU, MITSUTOSHI MIYASAKA, YUSUKE NISHIMUTA, Asayama Yoshiki, Akihiro Nishie, Satoshi Kawanami, Minako Hirahashi, Eiji Oki, Hiroshi Honda

    European Radiology, 2016.05. 2016.5

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

  • 内視鏡的に切除した十二指腸ブルンネル腺過形成の1例InvitedReviewedInternational journal

    高津 憲之, 古森 正宏, 鶴丸 大介, 浅山 良樹, 平賀 聖久, 平橋 美奈子, 山田 義生, 本田 浩

    臨床放射線 58(13):1887-1891 2013年12月 2013.12

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

  • 摘出術で切除しえた巨大食道平滑筋腫の1例InvitedReviewedInternational journal

    伊藤 修平, 森田 勝, 堤 智崇, 財津 瑛子, 安藤 幸滋, 日吉 幸晴, 佐伯 浩司, 沖 英次, 杉町 圭史, 山下 洋市, 内山 秀昭, 川中 博文, 池田 哲夫, 西牟田 雄祐, 鶴丸 大介, 宮坂 光俊, 小田 義直, 前原 喜彦

    臨牀と研究 90(11):1634-1637 2013年11月 2013.11

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

  • A case of pelvic schwannoma presenting prominent eggshell-like calcification.ReviewedInternational journal

    Nakashima T, Tsurumaru D, Nishimuta Y, Miyasaka M, Nishie A, Honda H.

    Case Rep Radiol. 2013;825078. Oct. ,2013 2013.10

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

  • A case of rectal Dieulafoy's lesion successfully treated by transcatheter arterial embolizationInvitedReviewedInternational journal

    Nishimuta Y, Tsurumaru D, Komori M, Asayama Y, Ishibashi T, Honda H

    Jpn J Radiol. 2012 Feb;30(2):176-9 2012.2

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Faculty Profiles - NISHIMUTA YUSUKE (2025)

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