Inoue, Masanori



School of Medicine, Department of Radiology (Diagnostic Radiology) (Shinanomachi)


Assistant Professor/Senior Assistant Professor

Academic Background 【 Display / hide


    Keio University, School of Medicine


Academic Degrees 【 Display / hide

  • Percutaneous Cryoablation of Lung Tumors: Feasibility and Safety, Keio University

    Percutaneous Cryoablation of Lung Tumors: Feasibility and Safety


Papers 【 Display / hide

  • Computed tomography-guided percutaneous cryoablation for recurrent sacral chordoma following carbon ion radiotherapy: A case report

    Inaba N., Nakayama R., Mori T., Hosaka S., Susa M., Yabe H., Inoue M., Nakatsuka S., Nakamura M., Matsumoto M., Toyama Y., Morioka H.

    Journal of Orthopaedic Science (Journal of Orthopaedic Science)  24 ( 2 ) 368 - 372 2019.03

    ISSN  09492658

  • Current management strategies for visceral artery aneurysms: an overview

    Obara H., Kentaro M., Inoue M., Kitagawa Y.

    Surgery Today (Surgery Today)   2019

    ISSN  09411291

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    © 2019, Springer Nature Singapore Pte Ltd. Visceral artery aneurysms (VAAs) are rare and affect the celiac artery, superior mesenteric artery, and inferior mesenteric artery, and their branches. The natural history of VAAs is not well understood as they are often asymptomatic and found incidentally; however, they carry a risk of rupture that can result in death from hemorrhage in the peritoneal cavity, retroperitoneal space, or gastrointestinal tract. Recent advances in imaging technology and its availability allow us to diagnose all types of VAA. VAAs can be treated by open surgery, laparoscopic surgery, endovascular therapy, or a hybrid approach. However, there are still no specific indications for the treatment of VAAs, and the best strategy depends on the anatomical location of the aneurysm as well as the clinical presentation of the patient. This article reviews the literature on the etiology, clinical features, diagnosis, and anatomic characteristics of each type of VAA and discusses the current options for their treatment and management.

  • Urodynamic 4D-CT evaluation: 320-row area detector CT scanner combined with PhyZiodynamics software analysis provides an innovative system to evaluate urinary flow and outlet obstructions

    Mori S., Yashiro H., Inoue M., Takahara K., Kusaka M., Shiroki R.

    Acta Radiologica (Acta Radiologica)   2019

    ISSN  02841851

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    © The Foundation Acta Radiologica 2019. Background: Evaluation of the morphology of the lower urinary tract as well as the movements associated with urination are required for the symptomatic diagnosis of lower urinary tract obstruction as well as the assessment of postoperative adaptation. However, no tool currently exists for direct and easy patient evaluation. Purpose: To evaluate lower urinary tract obstruction and postoperative adaptation using a four-dimensional (4D) virtual reality urination image (urodynamic 4D-CT image). Material and Methods: We used a 320-row area detector CT scanner and PhyZiodynamics image analysis software to perform 197 urodynamic 4D-CT examinations on 175 first-time patients between January 2014 and March 2017. Results: A comparison of the obtained images before and after holmium laser enucleation of the prostate revealed the morphological changes due to prostate enucleation and enabled visualization of the ideal urination conditions, showing that the anatomical structural changes during urination and the opening of the urethra play a major role in improving voiding function. Conclusion: Using low-dosage radiation, the sharply defined moving image obtained via urodynamic 4D-CT examination can be utilized as a physiological diagnostic tool to evaluate a series of urinary movements from any angle between the prostate, urethra, and bladder in a unitary manner with the time axis added. There was negligible patient impact. This technique could provide new opportunities for the diagnosis of lower urinary tract symptoms and post-surgical adaptation assessment.

  • Retroperitoneal hematoma volume is a good predictor of perioperative mortality after endovascular aneurysm repair for ruptured abdominal aortic aneurysm

    Fujimura N., Takahara M., Isogai N., Yashiro H., Shibutani S., Inoue M., Obara H., Ogino H.

    Journal of Vascular Surgery (Journal of Vascular Surgery)  68 ( 4 ) 998 - 1006.e2 2018.10

    ISSN  07415214

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    © 2018 Society for Vascular Surgery Objective: The objective of this study was to validate the usefulness of retroperitoneal hematoma volume as a predictor of perioperative mortality after endovascular aneurysm repair (EVAR) for ruptured abdominal aortic aneurysm (rAAA). Methods: We retrospectively reviewed consecutive patients with rAAA who underwent the unified EVAR first protocol between 2012 and 2016 at any one of three participating institutions in Japan and were prospectively registered in a dedicated database. Only patients with preoperative computed tomography scans adequate for three-dimensional volumetric analysis were included. Volumetry was used to measure the retroperitoneal hematoma volume. To adjust for body size differences between patients, the retroperitoneal hematoma volume was divided by the abdominal cavity volume, and the predictive power of this ratio was validated using appropriate statistical methods. Results: Of 114 patients with rAAA managed during the study period, 101 (88.6%) underwent EVAR, 9 (7.9%) underwent open surgical repair, and 4 (3.5%) did not undergo any repair. Finally, 82 of 101 patients treated with EVAR were included in the analysis. Within 30 days after EVAR, the mortality rates for the 82 patients included in the analysis and the 19 excluded patients were 24.4% and 31.6%, respectively, without statistically significant differences (P =.518). The retroperitoneal hematoma volume ratio was 3.59% ± 2.46% and 7.63% ± 3.45% in survivors and nonsurvivors, respectively (P <.001). Univariate analysis of other preoperative demographic and anatomic factors revealed that a Glasgow Aneurysm Score >85, systolic blood pressure <90 mm Hg, loss of consciousness, and mean minimum right external iliac artery diameter were statistically significant. Receiver operating characteristic curve analysis for the prediction of perioperative mortality revealed that retroperitoneal hematoma volume ratio was the best predictor of perioperative mortality in patients with rAAA of type >III in the Fitzgerald classification (area under the curve: retroperitoneal hematoma volume ratio, 0.880; Glasgow Aneurysm Score, 0.587; P <.001). Based on the Youden index, the optimal cutoff for the retroperitoneal hematoma volume ratio was 6.97%, providing a sensitivity of 0.833 and specificity of 0.860. Conclusions: Our study suggests that retroperitoneal hematoma volume may be a good predictor of perioperative mortality after EVAR for rAAA, especially for patients with Fitzgerald classification >III and a best cutoff value of 6.97%.

  • Imaging Findings of Atypical Type II Endoleak Through Vasa Vasorum After Abdominal Endovascular Aneurysm Repair

    Torikai H., Inoue M., Nakatsuka S., Tamura M., Yashiro H., Yoshitake A., Shimizu H., Jinzaki M.

    CardioVascular and Interventional Radiology (CardioVascular and Interventional Radiology)  41 ( 1 ) 186 - 190 2018.01

    ISSN  01741551

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    © 2017, Springer Science+Business Media, LLC and the Cardiovascular and Interventional Radiological Society of Europe (CIRSE). A type II endoleak (T2EL) is the most common endoleak after endovascular aneurysm repair (EVAR), and a persistent T2EL has been occasionally associated with aneurysmal enlargement. Typical findings of a T2EL consist of an endoleak cavity with inflow and outflow arteries of aortic branch vessels. However, an atypical T2EL, in which hypertrophied vasa vasorum and enlargement of a thrombosed aneurysm are observed, has no endoleak cavity. We have seen three cases of continuous aortic aneurysmal growth after EVAR caused by atypical T2ELs without endoleak cavities through developed vasa vasorum. In this report, the imaging findings of selective angiography and dynamic computed tomography of these cases are reviewed.

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Papers, etc., Registered in KOARA 【 Display / hide

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Reviews, Commentaries, etc. 【 Display / hide

Presentations 【 Display / hide

  • Suparparamagnetic iron oxide-enhanced MR imaging for hepatocellular carcinoma: A comparative study with CT-arterioportography plus CT-arteriography

    Tanimoto Akihiro, Shinmoto Hiroshi, Nakatsuka Seishi, Okuda Shigeo, Inoue Masanori, Kuribayashi Sachio

    Radiological Society of North America 88th Scientific Assembly and Annual Meeting, 2002.12, Oral Presentation(general)

  • 肝腫瘍術前検査としてのSPIO造影MRIとCTAP+CTHAの比較

    Tanimoto akihiro, Shinmoto hiroshi, Okuda shigeo, Nakatsuka seishi, Inoue masanori, Higuchi nobuya, Kuribayashi sachio

    第30回日本磁気共鳴医学会大会, 2002.09, Oral Presentation(general)

  • PTCD後のbilio-venous fistulaによるbilhemiaにinterventionにて対処した1例

    Inoue Masanori, Nakatsuka Seishi, Hashimoto Subaru, Hasebe Terumitsu, Matsumoto Kazuhiro, Sugiura Hiroaki, Satou Masayasu, Yamamoto Seika, Kuribayashi Sachio

    第14回関東IVR研究会, 2002.07, Oral Presentation(general)

  • 種々のIVR手技により救命し得た膵癌術後合併症の1例

    Satou Masayasu, Hashimoto Subaru, Nakatsuka Seishi, Yamamoto Seika, Inoue Masanori, Sugiura Hiroaki, Hasebe Terumitsu, Matsumoto Kazuhiro, Kuribayashi Sachio

    第14回関東IVR研究会, 2002.07, Oral Presentation(general)

  • 腎血管性高血圧症に対して腎機能廃絶目的にて腎静脈BRTOを施行した1例

    Yamamoto Seika, Hashimoto Subaru, Kuribayashi Sachio, Satou Masayasu, Inoue Masanori, Sugiura Hiroaki, Hasebe Terumitsu, Matsumoto Kazuhiro, Nakatsuka Seishi

    第14回関東IVR研究会, 2002.07, Oral Presentation(general)

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Research Projects of Competitive Funds, etc. 【 Display / hide

  • 免疫不全豚を用いた結節型肝癌実験モデル作成と血流動態-病理相関の検討


    MEXT,JSPS, Grant-in-Aid for Scientific Research, 井上 政則, Grant-in-Aid for Scientific Research (C), Principal Investigator

  • Fundamental study on percutaneous thoracic duct embolization for chylothorax: Establishment of animal model and evaluation of safety


    MEXT,JSPS, Grant-in-Aid for Scientific Research, 井上 政則, Grant-in-Aid for Scientific Research (C), Principal Investigator