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Small-for-size syndrome and portal vein wall shear stress in living donor liver transplantation: 4D Flow and CFD analysis

Research Project

Project/Area Number 19K17165
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 52040:Radiological sciences-related
Research InstitutionNagoya University

Principal Investigator

Hyodo Ryota  名古屋大学, 医学部附属病院, 助教 (80831388)

Project Period (FY) 2019-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2020: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2019: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
Keywords4D flow MRI / 肝移植 / 門脈 / 壁剪断応力 / CFD / 4D-Flow MRI / 生体肝移植
Outline of Research at the Start

生体肝移植では死体肝移植と異なり部分肝移植となるため、門脈の吻合形態が複雑化することが多い。移植肝に供給される門脈血流も流線・流量とも生理的とはいえず、時に過小グラフト症候群を発症する。今回、4D-Flow MRIを用いて移植肝門脈枝の流線・流量や壁剪断応力を測定・解析し、コンピュータシミュレーションを行うことで、過小グラフト症候群の発生の予知や門脈血流・壁剪断応力と肝再生の関係の検討、さらに至適な門脈吻合形態を探索する。

Outline of Final Research Achievements

By imaging 4D flow MRI of the portal venous system in liver transplantation (before and after donor and recipient surgery), gastroenterology (before and after percutaneous transcatheter embolization for hepatic encephalopathy), and gastroenterology surgery (before and after percutaneous transhepatic portal vein embolization, etc.), we can obtain portal vein blood flow and blood flow parameters that can be measured with the 4D flow in normal and cirrhotic livers. Based on these changes, we examined whether the mechanism of liver regeneration shown in in-virto can be applied in-vivo, and also examined the indications and therapeutic effects of treatment for each disease. As a result, we were able to confirm in-vivo the liver regeneration after an increase in wall shear stress as shown in basic research, and were also able to visualize the therapeutic effects of other treatments based on the changes in blood flow after treatment.

Academic Significance and Societal Importance of the Research Achievements

いままで基礎研究でのみ示されてきた肝再生と門脈の壁剪断応力の関係が、実際の人体から得られたデータで矛盾のないことが示された。また、様々な肝疾患における門脈血流の変化・分布と治療後の改善(流量や流れの形状変化など)が示されたことで、いままで経験則や理論から行われてきた治療に対し、4D flow MRIを用いることで実測での証明が可能と思われることが示された。

Report

(5 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Research-status Report
  • 2020 Research-status Report
  • 2019 Research-status Report
  • Research Products

    (12 results)

All 2023 2022 2021

All Journal Article (5 results) (of which Peer Reviewed: 5 results,  Open Access: 5 results) Presentation (6 results) (of which Int'l Joint Research: 3 results,  Invited: 2 results) Book (1 results)

  • [Journal Article] Assessing the Complicated Venous Hemodynamics and Therapeutic Outcomes of Budd-Chiari Syndrome with Respiratory-gated 4D Flow MR Imaging During the Expiratory and Inspiratory Phases2023

    • Author(s)
      Hyodo Ryota、Takehara Yasuo、Mizuno Takashi、Ichikawa Kazushige、Yokoyama Shinya、Ishizu Yoji、Naganawa Shinji
    • Journal Title

      Magnetic Resonance in Medical Sciences

      Volume: 22 Issue: 1 Pages: 1-6

    • DOI

      10.2463/mrms.ici.2021-0110

    • NAID

      130008127461

    • ISSN
      1347-3182, 1880-2206
    • Related Report
      2022 Annual Research Report 2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] 4D Flow MRI in the portal venous system: imaging and analysis methods, and clinical applications.2022

    • Author(s)
      Hyodo R, Takehara Y, Naganawa S.
    • Journal Title

      Radiol Med.

      Volume: 127 Issue: 11 Pages: 1181-1198

    • DOI

      10.1007/s11547-022-01553-x

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Aneurysmal Repair Increase in Local Energy Loss for Fusiform Abdominal Aortic Aneurysm: Assessments With 4D flow MRI.2022

    • Author(s)
      Horiguchi Ryota、Takehara Yasuo、Sugiyama Masataka、Hyodo Ryota、Komada Tomohiro、Matsushima Masaya、Naganawa Shinji、Mizuno Takashi、Sakurai Yasuo、Sugimoto Masayuki、Banno Hiroshi、Komori Kimihiro、Itatani Keiichi
    • Journal Title

      Journal of Magnetic Resonance Imaging

      Volume: 57 Issue: 4 Pages: 1199-1211

    • DOI

      10.1002/jmri.28359

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Portal Vein Stenosis Following Liver Transplantation Hemodynamically Assessed with 4D-flow MRI before and after Portal Vein Stenting2021

    • Author(s)
      Ryota Hyodo, Yasuo Takehara, Takashi Mizuno, Kazushige Ichikawa, Yasuhiro Ogura , Shinji Naganawa
    • Journal Title

      Magnetic Resonance in Medical Sciences

      Volume: 20 Issue: 3 Pages: 231-235

    • DOI

      10.2463/mrms.ici.2020-0057

    • NAID

      130008082661

    • ISSN
      1347-3182, 1880-2206
    • Related Report
      2021 Research-status Report 2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Time-resolved 3D cine phase-contrast magnetic resonance imaging (4D-flow MRI) can quantitatively assess portosystemic shunt severity and confirm normalization of portal flow after embolization of large portosystemic shunts2021

    • Author(s)
      Ryota Hyodo, Yasuo Takehara, Takashi Mizuno, Kazushige Ichikawa, Yoji Ishizu, Masataka Sugiyama, Shinji Naganawa
    • Journal Title

      Hepatol Res .

      Volume: 51(3) Issue: 3 Pages: 343-349

    • DOI

      10.1111/hepr.13616

    • Related Report
      2021 Research-status Report 2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] Hemodynamic changes in liver transplant donors after surgery: analysis with 4D flow MRI2023

    • Author(s)
      Ryota Hyodo, Yasuo Takehara, Takashi Mizuno, Kazushige Ichikawa, Yasuhiro Ogura, Shinji Naganawa
    • Organizer
      European Congress of Radiology 2023
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 門脈系の4D Flow MRI2022

    • Author(s)
      兵藤良太
    • Organizer
      第23回放射線研究セミナー
    • Related Report
      2022 Annual Research Report
    • Invited
  • [Presentation] Portal blood flow in the remnant portal branches is increased after percutaneous transhepatic portal vein embolization (PTPVE) for biliary tract cancer: An analysis with 4D flow MRI2022

    • Author(s)
      Ryota Hyodo, Yasuo Takehara, Takashi Mizuno, Kazushige Ichikawa, Masataka Sugiyama, Tomoki Ebata, Shinji Naganawa
    • Organizer
      European Society of Gastrointestinal and Abdominal Radiology 2022
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] A case of a large portosystemic shunt in which 4D flow MRI was useful for hemodynamic evaluation2022

    • Author(s)
      Ryota Hyodo, Yasuo Takehara, Tomohiro Komada, Masaya Matsushima, Takashi Mizuno, Kazushige Ichikawa, Yoshiaki Sugiyama, Yoji Ishizu, Yuki Sato, Yuri Ogiso, Ken Nagasaka, Masataka Sugiyama, Shinji Naganawa
    • Organizer
      第51回日本IVR学会
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 門脈領域の4D flow MRI2022

    • Author(s)
      兵藤良太
    • Organizer
      第50回日本磁気共鳴医学会大会
    • Related Report
      2022 Annual Research Report
    • Invited
  • [Presentation] 4D flow MRIが血行動態把握や治療評価に有用であった Budd-Chiari症候群の1例2021

    • Author(s)
      兵藤良太
    • Organizer
      第50回日本IVR学会総会
    • Related Report
      2021 Research-status Report 2020 Research-status Report
  • [Book] Rad Fan 9月号2022

    • Author(s)
      兵藤良太
    • Total Pages
      96
    • Publisher
      メディカルアイ
    • Related Report
      2022 Annual Research Report

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Published: 2019-04-18   Modified: 2024-01-30  

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