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Computational modeling of patient-specific cardiovascular dynamics based on multimodality medical imaging

Research Project

Project/Area Number 21K18037
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 90110:Biomedical engineering-related
Research InstitutionOsaka University

Principal Investigator

Otani Tomohiro  大阪大学, 大学院基礎工学研究科, 講師 (40778990)

Project Period (FY) 2021-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2022: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2021: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
Keywords血流動態 / 循環器 / 脳脊髄液 / 数値流体力学 / データ同化 / MRI / 4D flow MRI / 変分最適制御 / 血液流動 / 計算バイオメカニクス / 4D CT / 血行力学 / 渦電流 / 最適制御 / 医用画像処理 / 循環器血流
Outline of Research at the Start

本研究では,連続体力学理論に基づき,マルチモダリティ医用画像の計測情報から,時間-空間ともに連続な患者個別の力学場を推定するための基盤理論を構築する.連続体力学理論に基づく場の支配方程式を考え,医用画像から得られる離散的な計測情報から,時間-空間ともに連続な循環器系の力学場を患者個々にコンピュータ上で再現する.さらに,各モダリティの画像が持つ不確かさを計測原理に基づき考慮し,統計数理の観点から,推定結果に対する計測情報の不確かさの影響を定量的に明らかにする.最終的には,医用画像の計測精度の範囲での妥当性を保証する,循環器系力学場の患者別評価システムの確立を目指す.

Outline of Final Research Achievements

This study developed clinical image-based computational frameworks of fluid dynamics simulator using high-performance computing, artifact removal algorithm from magnetic resonance imaging (MRI) of physiological flow, and flow data assimilation using MRI images. Computational simulation of the left atrium (LA) based on electrocardiography-gated computed tomography clarified the effect of lobectomy on LA hemodynamics. Next, subject-specific assessment and correction of the artifact in flow MRI data was developed and its efficacy was demonstrated using MRI images of cerebrospinal fluid flow in the brain ventricle system. Furthermore, a flow data assimilation based on MRI images was developed based on optimal boundary controls and numerical examples successfully demonstrated its capabilities to obtain fine and physically consistent profiles of physiological flow in living bodies.

Academic Significance and Societal Importance of the Research Achievements

本研究で構築した,大規模並列化を駆使した循環器血流の患者別解析や,生体流れのMRI計測におけるアーチファクト除去および流体データ同化手法は,数理・力学計算による生体流れ計測・理解の高度化をもたらすものであり,いずれも生体流れ解析の汎用的なツールとなり得る.特に,MRIによる流動計測は,血流場だけでなく脳脊髄液流れなど様々な応用および臨床診断への展開が期待されるが,時空間解像度の限界や複数種類のアーチファクトの問題を含んでおり,定量的妥当性の向上が望まれている.本研究で構築した技術群は,はこれらの問題の解決に向けた基幹技術と位置付けられる.

Report

(3 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Research-status Report
  • Research Products

    (19 results)

All 2023 2022 2021

All Journal Article (4 results) (of which Peer Reviewed: 4 results,  Open Access: 2 results) Presentation (15 results) (of which Int'l Joint Research: 6 results,  Invited: 5 results)

  • [Journal Article] Computational study on hemodynamic effects of left superior pulmonary vein resection and associated physiological changes in the left atrium after left upper lobectomy2023

    • Author(s)
      Yi Wentao、Otani Tomohiro、Yoshida Takuya、Endo Shunsuke、Wada Shiego
    • Journal Title

      Computer Methods in Biomechanics and Biomedical Engineering

      Volume: 2023 Feb 15 Issue: 2 Pages: 1-12

    • DOI

      10.1080/10255842.2023.2178258

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] A concept on velocity estimation from magnetic resonance velocity images based on variational optimal boundary control2022

    • Author(s)
      OTANI Tomohiro、YAMASHITA Hiroshi、IWATA Kazuma、ILIK Selin Yavuz、YAMADA Shigeki、WATANABE Yoshiyuki、WADA Shigeo
    • Journal Title

      Journal of Biomechanical Science and Engineering

      Volume: 17 Issue: 3 Pages: 22-00050-22-00050

    • DOI

      10.1299/jbse.22-00050

    • ISSN
      1880-9863
    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] On the Impact of Left Upper Lobectomy on the Left Atrial Hemodynamics2022

    • Author(s)
      Otani Tomohiro、Yoshida Takuya、Yi Wentao、Endo Shunsuke、Wada Shigeo
    • Journal Title

      Frontiers in Physiology

      Volume: 13 Pages: 830436-830436

    • DOI

      10.3389/fphys.2022.830436

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] A subject‐specific assessment of measurement errors and their correction in cerebrospinal fluid velocity maps using 4D flow MRI2021

    • Author(s)
      Yavuz Ilik Selin、Otani Tomohiro、Yamada Shigeki、Watanabe Yoshiyuki、Wada Shigeo
    • Journal Title

      Magnetic Resonance in Medicine

      Volume: 87 Issue: 5 Pages: 2412-2423

    • DOI

      10.1002/mrm.29111

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Presentation] 巨視的な循環器血流動態に対する計算力学の学術的意義2022

    • Author(s)
      大谷智仁
    • Organizer
      日本機械学会第34回バイオエンジニアリング講演会
    • Related Report
      2022 Annual Research Report
    • Invited
  • [Presentation] Left atrial hemodynamics after the left upper lobectomy2022

    • Author(s)
      Tomohiro Otani, Takuya Yoshida, Wentao Yi, Shunsuke Endo, Shigeo Wada
    • Organizer
      9th World Congress of Biomechanics
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] 肺葉切除による左心房内血流の流動特性の変化:数値シミュレーションによる可視化と評価2022

    • Author(s)
      大谷智仁、吉田拓矢、Yi Wentao、遠藤俊輔、和田成生
    • Organizer
      日本流体力学会年会2022
    • Related Report
      2022 Annual Research Report
  • [Presentation] 変分最適制御に基づく4D flow MRI計測速度場のデータ同化手法に関する基礎検討2022

    • Author(s)
      岩田和真,大谷智仁,和田成生
    • Organizer
      生体医工学シンポジウム2022
    • Related Report
      2022 Annual Research Report
  • [Presentation] Effects of geometrical alteration on left atrial hemodynamics after differnt PVs resection2022

    • Author(s)
      Wentao Yi, Tomohiro Otani, Takuya Yoshida, Shunsuke Endo, Shigeo Wada
    • Organizer
      15th World Congress on Computational Mechanics (WCCM-XV) & 8th Asian Paciffic Congress on Computational Mechanics (APCOM-VIII)
    • Related Report
      2022 Annual Research Report
  • [Presentation] A pilot study of blood flow structure in the left ventricle using 4D flow magnetic resonance imaging2021

    • Author(s)
      Tomohiro Otani, Seiko Ide, Hiroshi Yamashita, Yasushi Sakata, Shigeo Wada
    • Organizer
      The 11th Asian-Pacific Biomechanics
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] Correction of eddy-current based phase offset errors in cerebrospinal fluid flow measurement: four-dimensional flow magnetic resonance imaging2021

    • Author(s)
      Selin Yavuz Ilik, Tomohiro Otani, Shigeki Yamada, Yoshiyuki Watanabe, Shigeo Wada
    • Organizer
      The 11th Asian-Pacific Biomechanics
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] Feasibility study to predict the left atrial hemodynamics after pulmonary vein resection by a computational simulation using preoperative 4D-CT images2021

    • Author(s)
      Wentao Yi, Takuya Yoshida, Tomohiro Otani, Shunsuke Endo, Shigeo Wada
    • Organizer
      The 11th Asian-Pacific Biomechanics
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] Fluid dynamical effects of pulmonary vein resection on blood flow pattern in human left atrium2021

    • Author(s)
      Takuya Yoshida, Wentao Yi, Tomohiro Otani, Shunsuke Endo, Shigeo Wada
    • Organizer
      The 11th Asian-Pacific Biomechanics
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] Development on a computational framework to express patient-specific intracranial cerebrospinal fluid flow based on phase-contrast magnetic resonance images2021

    • Author(s)
      Shusaku Maeda, Tomohiro Otani, Shigeki Yamada, Yoshiyuki Watanabe, Selin Yavus Illik, Naoki Takeishi, Shigeo Wada
    • Organizer
      Summer Biomechanics, Bioengineering and Biotransport Conference
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] 肺葉切除術における切除肺葉の違いが左房内血流動態に与える影響:4D-CT画像に基づく数値流体力学計算2021

    • Author(s)
      Yi Wentao, 吉田拓也、大谷智仁、遠藤俊輔、和田成生
    • Organizer
      日本機械学会第34回計算力学講演会
    • Related Report
      2021 Research-status Report
  • [Presentation] MRI計測に基づく正常圧水頭症患者の脳脊髄液流れの数値シミュレーション2021

    • Author(s)
      前田修作,Selin Yavuz Ilik ,大谷智仁,武石直樹,和田成生
    • Organizer
      日本機械学会 第33回バイオエンジニアリング講演会
    • Related Report
      2021 Research-status Report
  • [Presentation] 脳血流をコンピュータで解く:数値計算で、今なにができるか2021

    • Author(s)
      大谷智仁
    • Organizer
      第39回日本小児心身医学会学術集会
    • Related Report
      2021 Research-status Report
    • Invited
  • [Presentation] 計算力学の観点から4D flow MRIに寄せる期待2021

    • Author(s)
      大谷智仁
    • Organizer
      第3回4D Flow研究会
    • Related Report
      2021 Research-status Report
    • Invited
  • [Presentation] Computational modeling in intracranial fluid dynamics: cerebrospinal and interstitial fluids2021

    • Author(s)
      Tomohiro Otani, Shusaku Maeda, Shigeki Yamada, Yoshiyuki Wadatabe, Selin Yavus Ilik, Naoki Takeishi, Shigeo Wada
    • Organizer
      第60回日本生体医工学会
    • Related Report
      2021 Research-status Report
    • Invited

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Published: 2021-04-28   Modified: 2024-01-30  

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