Updated on 2025/03/07

写真a

 
KOMADA Tomohiro
 
Organization
Nagoya University Hospital Radiology Lecturer
Graduate School
Graduate School of Medicine
Title
Lecturer
Contact information
メールアドレス

Degree 1

  1. 医学博士 ( 2009.3   名古屋大学 ) 

Research Interests 2

  1. Radiology

  2. Interventional Radiology

Research Areas 1

  1. Life Science / Radiological sciences

Education 1

  1. Nagoya University   Graduate School, Division of Medical Sciences

    2005.4 - 2009.3

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    Country: Japan

Professional Memberships 4

  1. 日本医学放射線学会

  2. Japanese Society of Interventional Radiology

  3. JAPANESE SOCIETY OF NUCLEAR MEDICINE

  4. JAPAN RADIOLOGICAL SOCIETY

Committee Memberships 1

  1. 日本インターベンショナルラジオロジー学会   ガイドライン委員  

    2023.8   

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    Committee type:Academic society

 

Papers 24

  1. Embolization using patient-specific vascular models created by a 3D printer for difficult cases: a report of two cases. Reviewed

    Tomohiro Komada, Takeshi Kamomae, Masaya Matsushima, Ryota Hyodo, Shinji Naganawa

    Nagoya journal of medical science   Vol. 84 ( 2 ) page: 477 - 483   2022.5

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    Authorship:Lead author   Language:English  

    With the widespread use of three-dimensional printers, organ models created by these printers are now being used in the medical field for preoperative planning of surgeries. In this article, we report two cases in which embolization was expected to be difficult, and the three-dimensional printer-based vascular modeling was helpful in planning the surgery. The first case involved an aneurysm of the splenic artery. We attempted to embolize the aneurysm but were unable to advance the catheter into the distal artery and discontinued the procedure. The second case was a perianal varicose vein, which was initially treated with percutaneous transhepatic obliteration but was recanalized and required embolization. However, we expected difficulty in selecting the inferior mesenteric vein. In both cases, the vascular models were created using a 3D printer from the patients' computed tomography images. Preoperative planning, including treatment simulation, was based on these models. The time required to print a three-dimensional vascular model was approximately 12 hours at a cost of less than $10 each. Patient-specific vascular models using a three-dimensional printer can be a simple and inexpensive tool that can increase the success of embolization in difficult cases.

    DOI: 10.18999/nagjms.84.2.477

    Web of Science

    PubMed

  2. Balloon-Occluded Retrograde Transvenous Obliteration for Fundal Gastric Variceal Bleeding in a Small Child. Reviewed International journal

    Tomohiro Komada, Kojiro Suzuki, Kazuo Oshima, Masaya Matsushima, Ken Nagasaka, Shinji Naganawa

    Journal of vascular and interventional radiology : JVIR   Vol. 30 ( 10 ) page: 1624 - 1625   2019.10

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    Authorship:Lead author   Language:English  

    DOI: 10.1016/j.jvir.2019.06.022

    Web of Science

    PubMed

  3. Development of Three-Dimensional Printed Compensator for Improvement of Dose Distribution in Boron Neutron Capture Therapy: A Preliminary Study

    Kamomae, T; Sakurai, Y; Oita, M; Takata, T; Niimi, T; Matsumura, T; Saito, T; Komada, T; Kato, K; Itoh, Y; Naganawa, S

    MEDICAL PHYSICS   Vol. 46 ( 6 ) page: E411 - E411   2019.6

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  4. Efficacy of percutaneous transhepatic portal vein embolization using gelatin sponge particles and metal coils Reviewed International journal

    Tomohiro Komada, Kojiro Suzuki, Takashi Mizuno, Tomoki Ebata, Masaya Matsushima, Shinji Naganawa, Masato Nagino

    Acta Radiologica Open   Vol. 7 ( 4 ) page: 2058460118769687 - 205846011876968   2018.4

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    Authorship:Lead author   Language:English   Publishing type:Research paper (scientific journal)   Publisher:SAGE Publications  

    Background: Percutaneous transhepatic portal vein embolization (PTPE) can increase the future liver remnant (FLR) volume before extended liver resection; however, there is no current consensus regarding the best embolic material for PTPE. Purpose: To evaluate the efficacy of PTPE using gelatin sponge particles and coils. Material and Methods: The medical records of 136 patients who underwent PTPE using gelatin sponge particles and metal coils were retrospectively reviewed. We evaluated the procedural details, liver volume on CT, and clinical status before and after PTPE. Results: The mean FLR volume increased significantly from 390 ± 147 cm3 to 508 ± 141 cm3 (P < 0.001). A mean of 22.1 ± 9.4 days after PTPE, the mean increase in the ratio of FLR volume to total liver volume was 9.4 ± 6.5%. Complications related to PTPE occurred in five patients, including arterial damage (n = 4) and biloma (n = 1). The white blood cell count and C-reactive protein level increased significantly and then returned to baseline within seven days. Aspartate aminotransferase and alanine aminotransferase showed no significant changes. Fever (defined by the Common Terminology Criteria for Adverse Events v4.0) was reported in 74 patients (54%), but it was generally mild (Grade 1/2; n = 72). None of the patients experienced severe complications that required cancellation of surgery. Conclusion: PTPE with gelatin sponge particles and coils may impose low physical stress on patients and is a safe method of inducing a significant increase of FLR.

    DOI: 10.1177/2058460118769687

    Web of Science

    PubMed

    Other Link: http://journals.sagepub.com/doi/full-xml/10.1177/2058460118769687

  5. Magnetic resonance imaging of cardiac sarcoidosis: an evaluation of the cardiac segments and layers that exhibit late gadolinium enhancement Reviewed

    Tomohiro Komada, Kojiro Suzuki, Hiroaki Ishiguchi, Hisashi Kawai, Takahiro Okumura, Akihiro Hirashiki, Shinji Naganawa

    Nagoya Journal of Medical Science   Vol. 78 ( 4 ) page: 437 - 446   2016.11

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    Authorship:Lead author   Language:English   Publishing type:Research paper (scientific journal)   Publisher:NAGOYA UNIV, SCH MED  

    Cardiac sarcoidosis (CS) can cause sudden death, which is the leading cause of mortality in patients with sarcoidosis in Japan. However, it is difficult to diagnose CS because of the lack of a sensitive diagnostic method for the condition. Late gadolinium-enhanced cardiac magnetic resonance (MR) imaging demonstrates improved sensitivity for diagnosing CS. Therefore, it is important to know the late gadolinium-enhancement (LGE) characteristics of CS on cardiac MR images in order to diagnose CS accurately. In this study, we investigated the most common sites of LGE on cardiac MR images in CS. Late gadolinium-enhanced MR images of 9 consecutive patients with CS (obtained between August 2009 and July 2015) were reviewed by two radiologists. The distribution of LGE was evaluated using the American Heart Association 17-segment model of the left ventricle. The LGE in each segment was also classified into 4 patterns according to the myocardial layer in which it occurred (the subepicardial, subendocardial, intramural, and transmural layer patterns). All 9 patients exhibited LGE in their left ventricle, and 70 of 153 (46%) myocardial segments were enhanced. All of the patients displayed LGE in the basal septal wall. The patients' LGE layer patterns were as follows: subepicardial: 40% (28/70), intramural: 30% (21/70), subendocardial: 16% (11/70), and transmural: 14% (10/70). The basal septum wall and subepicardial layer often exhibit LGE on cardiac MR images in CS patients. LGE can be observed in other segments and layers in some cases.

    DOI: 10.18999/nagjms.78.4.437

    Web of Science

    Scopus

    PubMed

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MISC 4

  1. 画像診断と病理 骨芽細胞腫

    駒田 智大, 岩野 信吾, 長縄 慎二, 新井 英介, 西田 佳弘, 下山 芳江

    画像診断   Vol. 39 ( 1 ) page: 4 - 5   2018.12

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    Language:Japanese   Publisher:(株)学研メディカル秀潤社  

  2. 成人期に診断された左室心筋緻密化障害の2例

    馬越 弘泰, 駒田 智大, 長縄 慎二

    映像情報Medical   Vol. 48 ( 6 ) page: 50 - 51   2016.6

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    Language:Japanese   Publisher:産業開発機構(株)  

  3. 【胆膵疾患における血管系IVR】総論 胆膵疾患における血管系IVR

    鈴木 耕次郎, 馬越 弘泰, 長坂 憲, 石口 裕章, 駒田 智大, 森 芳峰, 長縄 慎二

    胆と膵   Vol. 37 ( 5 ) page: 419 - 425   2016.5

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    Language:Japanese   Publisher:医学図書出版(株)  

    集学的治療として血管系IVRを積極的に活用することで、胆膵疾患における外科的、内科的治療と緩和医療の幅を広げることが可能となる。胆膵悪性腫瘍の外科手術では大量肝切除や膵切除など侵襲性の高い手術が多く、術前に経皮経肝門脈塞栓術や血流改変術を行うことで術後合併症の頻度を軽減し、より安全に手術を施行できる。また術後の動脈出血も動脈塞栓術やステントグラフト留置術により低侵襲な止血処置が可能である。門脈狭窄が原因の門脈圧亢進症や消化管出血では、門脈ステント留置術で症状緩和が得られる。血管系IVRは腫瘍性病変に限らず、膵炎に伴う仮性動脈瘤の動脈塞栓術や重症膵炎に対する薬物動注療法でも効力を発揮する。(著者抄録)

  4. 【肝胆膵領域における術前ストラテジー】手技各論 術前門脈枝塞栓術の実際 経皮的アプローチ

    鈴木 耕次郎, 江畑 智希, 駒田 智大, 森 芳峰, 水野 隆史, 菅原 元, 伊神 剛, 横山 幸浩, 梛野 正人

    外科   Vol. 76 ( 11 ) page: 1260 - 1264   2014.11

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    Language:Japanese   Publisher:(株)南江堂  

    経皮的アプローチの門脈枝脈塞栓術(percutaneous trans-hepatic portal vein embolization:PTPE)を施行するうえで重要なことは,(1)穿刺肝葉の選択,(2)超音波ガイド下の門脈枝穿刺,(3)門脈造影,(4)塞栓方法である.超音波検査とCTで門脈の走行と分岐形態を前もって把握し,これらを十分理解すればPTPEは安全に施行可能である.本稿では同側穿刺法によるPTPEの手技上のポイントを中心に,PTPEについて概説した.(著者抄録)

    Other Link: https://search.jamas.or.jp/index.php?module=Default&action=Link&pub_year=2014&ichushi_jid=J00393&link_issn=&doc_id=20141029130010&doc_link_id=issn%3D0016-593X%26volume%3D76%26issue%3D11%26spage%3D1260&url=http%3A%2F%2Fwww.pieronline.jp%2Fopenurl%3Fissn%3D0016-593X%26volume%3D76%26issue%3D11%26spage%3D1260&type=PierOnline&icon=https%3A%2F%2Fjk04.jamas.or.jp%2Ficon%2F00005_2.gif

Presentations 11

  1. Can the measurement of contrast iodine in the liver using DECT with portal venography serve as a predictive factor for the hypertrophy of the future liver remnant after PVE?

    Tomohiro Komada, Yuki Sato, Daiki Tamashiro, Ken Nagasaka, Ryota Horiguchi, Ryota Hyodo, Masaya Matsushima, Kyoko Ito, Shinji Naganawa

    European Society of Radiology (ECR)2025 

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    Event date: 2025.2 - 2025.3

    Language:English   Presentation type:Poster presentation  

  2. An attempt to create a hollow blood vessel model by direct inkjet 3D printing with nano-composite hydrogel for IR

    Tomohiro Komada, Takeshi Kamomae, Takashi Matsumura, Takuya Saito, Tatsuya Niimi, Masaya Matsushima, Ryota Hyodo, Shinji Naganawa

    CIRSE 2019 

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    Event date: 2019.9

    Language:English   Presentation type:Poster presentation  

  3. A Matched Study Comparing Right Portal Vein Embolization with and without Segment 4 Portal Vein Embolization for Right Hepatic Trisectionectomy

    Jun Ito, Tomohiro Komada, Masahiro Nakatochi, Fumie Kinoshita, Yumiko Kobayashi, Kojiro Suzuki, Shinji Naganawa

    RSNA 

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    Event date: 2018.11

    Language:English   Presentation type:Oral presentation (general)  

  4. The efficacy of percutaneous transhepatic portal vein embolization using gelatin sponge particles and metallic coils

    Tomohiro Komada, Kojiro Suzuki, Masaya Matsushima, Yoshine Mori, Ken Nagasaka, Hiroyasu Umakoshi, Tomoki Ebata, Masato Nagino, Shinji Naganawa

    ECR 2017 

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    Event date: 2017.3

    Language:English  

  5. MR Imaging of Cardiac Sarcoidosis: Spectrum of Imaging Findings and Differential Diagnosis

    Tomohiro Komada, Kojiro Suzuki, Masaya Matsushima, Yoshine Mori, Ken Nagasaka, Hiroyasu Umakoshi, Tomoki Ebata, Masato Nagino, Shinji Naganawa

    RSNA 

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    Event date: 2014.11 - 2014.12

    Language:English  

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KAKENHI (Grants-in-Aid for Scientific Research) 5

  1. A new strategy of IVR for extended hepatic resection incorporating evaluation of intrahepatic portal collateral tracts and hepatic vein embolization

    Grant number:21K07562  2021.4 - 2025.3

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (C)

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    Authorship:Principal investigator 

    Grant amount:\3380000 ( Direct Cost: \2600000 、 Indirect Cost:\780000 )

  2. An attempt to create a blood vessel model with visceral aneurysm by 3D printer

    Grant number:17K16432  2017.4 - 2023.3

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Young Scientists (B)

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    Authorship:Principal investigator  Grant type:Competitive

    Grant amount:\2730000 ( Direct Cost: \2100000 、 Indirect Cost:\630000 )

  3. 治療抵抗性致死的不整脈に対する定位放射線治療の研究

    Grant number:21K07725  2021.4 - 2026.3

    日本学術振興会  科学研究費助成事業  基盤研究(C)

    川村 麻里子, 因田 恭也, 駒田 智大

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    Authorship:Coinvestigator(s) 

    器質的心疾患に伴う心室頻拍(VT)はしばしば難治性である。国外を中心に、この難治性なVTに対する放射線を用いた非侵襲的アブレーション治療の臨床試験が行われ、短期的には良好な結果が報告されている。本研究では海外での研究成果を基盤に、国内の診療体制でも実現可能な方法へ変換し、高精度定位放射線治療によるアブレーション治療技術を開発するものである。本治療が本邦でも施行可能となることで、現在治療法がなく、突然死の恐怖と日々戦っている患者の希望となると確信している。
    致死的不整脈に対する定位放射線治療の特定臨床試験実施のために、プロトコルを作成し、院内の倫理審査を経て、2023年6月に正式にプロトコルが承認された。本試験ではまず、3名の患者に対する本治療の安全性を検討することとしている。特定臨床研究の実施に際しては、JRCTsにて公開(jRCTs042230030)し、臨床試験プロトコルについては英語論文化し、公開した。
    (Stereotactic radiotherapy for ventricular tachycardia: A study protocol. https://doi.org/10.12688/f1000research.138758.2)
    更に、11月に、2名の患者に対し、本治療を実施し、現在、経過観察中である。前年度、先行施設見学として、当初予定していたワシントン大学ではなく、チェコのオストラバ大学とスイスのCHUV大学へ施設見学し、協力要請を行ったことから、同施設に2名の患者の治療に際しては、協力を依頼し、治療計画作成時にZoomでのカンファレンスも実施した上で治療を行なった。
    当初予定したワシントン大学から見学先を変更した理由として、ワシントン大学で使用している照射装置と当院で使用している照射装置が異なることから、当院で採用している照射装置を用いて本治療の実施実績のあるオストラバ大学、CHUV大学へ協力を仰いだ。治療の実施については研究会でも報告しており、現在、論文化に向けて準備中である。現時点では大きな合併症もなく、順調である。
    R6年度中に臨床試験を開始する予定だったが、R5年度中に開始できた。
    特定臨床試験としてはあと1名の治療を実施し、1年間フォローを行う予定である。それらの結果を国内外で発表する予定である。

  4. Development of Rupture-Risk-Prediction System for Aortic Aneurysm Using Fluid&#8211;Structure Interaction Analysis.

    Grant number:21H02868  2021.4 - 2024.3

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (B)

    Takehara Yasuo

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    Authorship:Coinvestigator(s) 

    The abdominal aorta undergoes arteriosclerosis with aging, resulting in elongated and curved flow paths that induce local turbulence and a decrease in local wall shear stress (WSS). This promotes the worsening of atherosclerosis and further wall weakening through coagulation-fibrinolysis and immune systems, leading to local wall bulging and further turbulence. This vicious cycle creates abdominal aortic aneurysms. We developed an in-silico model using fluid-structure interaction (FSI) analysis to iteratively reproduce this vicious cycle. This model was validated against in-vivo results from contrast-enhanced MR angiography and 4D Flow MRI, and in-vitro results from phantom experiments, in 12 actual AAA patients. The prototype model showed that the non-dilated abdominal aorta remodels and gradually approximates the shape of an actual AAA.

  5. MR strategies to solve problems after endovascular aortic repair.

    Grant number:17K10398  2017.4 - 2020.3

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (C)

    Takehara Yasuo

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    Authorship:Coinvestigator(s) 

    Endovascular aneurysm repair (EVAR) has become a viable alternative to conventional surgical open repair owing to its perioperative survival benefit; however, EVAR is associated with a unique complication called endoleak (EL), which continues to perfuse and pressurize the aneurysm sac and cause aneurysm enlargement and rupture.
    Type I and type III endoleak were more detectable with MR angiography and streamline analysis with 4D Flow within the aneurysm. A comprehensive analysis of concurrent multiple T2EL vessels using 4D-flow MRI may enable prediction of the sac expansion after EVAR by larger amplitude of the flow velocity in the branch arteries.