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Elucidation of rupture mechanism with thrombus formation on blood vessel wall using optical imaging

Research Project

Project/Area Number 20K12612
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 90110:Biomedical engineering-related
Research InstitutionNational Institute of Technology, Toyama College

Principal Investigator

Kyoden Tomoaki  富山高等専門学校, その他部局等, 准教授 (50579729)

Co-Investigator(Kenkyū-buntansha) 田尻 智紀  富山高等専門学校, その他部局等, 講師 (10735525)
安東 嗣修  金城学院大学, 薬学部, 教授 (50333498)
秋口 俊輔  富山高等専門学校, その他部局等, 准教授 (50462130)
八賀 正司  公立小松大学, 保健医療学部, 教授 (80123305)
Project Period (FY) 2020-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2022: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2021: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2020: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
KeywordsLDV / 血液 / 血栓 / せん断応力 / AOM / Blood flow / Red Blood Cell / 血流 / 流速分布 / 多点化 / 血流速 / 血流計測 / Laser
Outline of Research at the Start

レーザー光の重ね合わせによって生じる光干渉縞模様を血管内に形成することで血流速度を計測できるMultipoint Laser Doppler Velocimetry (MLDV)を利用して血栓がトリガーとなる血管壁破壊のプロセスを明らかにする.これまでにも構築してきたMLDVの改良からはじめ,最終年度にはモデル流路や実血液を用いた計測実験を行う.計測機器や流体の複雑さ,生体計測においてクリアすべき課題は多いが,研究分担者と協力し,着実に研究を進めていく.

Outline of Final Research Achievements

Multipoint Laser Doppler Velocimetry (MLDV) with high spatial and temporal resolution was constructed in this research. High spatial resolution of the MLDV was constructed for the purpose of clarifying the effects of flow associated with thrombus formation. It is determined by the fiber array that receives the optical signal. We created an array with 0.125 mm optical fibers to measure minute thrombus and imaged the blood flow velocity and the presence of thrombus. In addition, by observing the viscosity coefficient caused by the properties of the blood, it was possible to quantitatively evaluate the shear stress distribution in flow channel caused by obstruction on the wall by measuring the velocity difference using MLDV. A region of localized flow stagnation was observed on the downstream side of the obstruction, the obstruction affected the shear stress in blood flow was shown by imaging results.

Academic Significance and Societal Importance of the Research Achievements

本研究は完全非侵襲・高時空間分解能のレーザー流速計測系を開発するとともに、血管壁に形成される血栓(瘤)の発生が血液流れに及ぼす影響を計測結果に基づき明らかにするものである。血管壁に血栓が形成されればその血栓が存在する部分だけでなく、血栓前部/背後部にまで流速が変化することをイメージング結果に基づき示した。学術的意義は流れに影響を及ぼすことのない計測手法が確立されたこと、さらにその結果に基づいて血栓の存在がせん断応力の観点から、血管壁に作用する応力を示すことができたことにある。計測系の構築によって未解明な血管内流れの可視化の基礎技術が確立され、血管内の診断技術として社会的にも意義がある。

Report

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

    (11 results)

All 2022 2021 2020

All Journal Article (2 results) (of which Peer Reviewed: 2 results) Presentation (9 results) (of which Int'l Joint Research: 3 results)

  • [Journal Article] Optical visualization of blood shear stress using laser Doppler velocimetry combined with acousto-optic module2021

    • Author(s)
      Tajiri Tomoki、Kyoden Tomoaki、Akiguchi Shunsuke、Andoh Tsugunobu、Hachiga Tadashi
    • Journal Title

      Optics Communications

      Volume: 483 Pages: 126607-126607

    • DOI

      10.1016/j.optcom.2020.126607

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] Optical Technology for Detecting Disease Related to Blood Flow Condition2020

    • Author(s)
      経田僚昭,秋口俊輔,田尻智紀,安東嗣修,八賀正司
    • Journal Title

      Journal of The Japan Institute of Electronics Packaging

      Volume: 23 Issue: 5 Pages: 353-358

    • DOI

      10.5104/jiep.23.353

    • NAID

      130007883766

    • ISSN
      1343-9677, 1884-121X
    • Year and Date
      2020-08-01
    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Presentation] Multipoint blood flow measurement system using laser Doppler velocimetry combined with acousto-optic modulator2022

    • Author(s)
      Ryo Shimazaki, Shunsuke Akiguchi, Tomoaki Kyoden, Tsugunobu Ando, Noboru Yamada, Shuto Tsuchida, Tadashi Hachiga
    • Organizer
      The 7th International Conference on “Science of Technology Innovation”
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] AOM-LDV の直接信号観測と超音波ピンセットへの適用2022

    • Author(s)
      渡澤直樹, 上島蒼, 八賀正司, 経田僚昭, 秋口俊輔, 義岡秀晃
    • Organizer
      2022年度 日本伝熱学会北陸信越支部 秋季セミナー
    • Related Report
      2022 Annual Research Report
  • [Presentation] 血液成分と近赤外散乱光強度の相関2022

    • Author(s)
      貫江乃愛, 秋口俊輔, 経田僚昭, 百生登, 安東嗣修, 山田昇, 土田脩斗, 八賀正司
    • Organizer
      2022年度 日本伝熱学会北陸信越支部 秋季セミナー
    • Related Report
      2022 Annual Research Report
  • [Presentation] 光学変調を導入した面計測LDV法による血流計測システム2022

    • Author(s)
      嶋﨑凌, 秋口俊輔, 経田僚昭, 百生登, 安東嗣修, 山田昇, 土田脩斗, 八賀正司
    • Organizer
      2022年度日本伝熱学会北陸信越支部春季セミナー
    • Related Report
      2022 Annual Research Report
  • [Presentation] 近赤外光による皮膚癌血流画像を用いた深層学習診断2021

    • Author(s)
      寺林 大樹 , 秋口 俊輔 , 経田 僚昭 , 百生 登 , 安東 嗣修 , 八賀 正司
    • Organizer
      2021年度日本伝熱学会北陸信越支部 春季セミナー
    • Related Report
      2021 Research-status Report
  • [Presentation] Deep Learning Method for Extracting Areas of Cancer Cells Using Microscope Images2021

    • Author(s)
      T. TERABAYASHI , S. AKIGUCHI , T. KYOUDEN , T. TAJIRI , T. ANDOH , T. HACHIGA
    • Organizer
      6th STI-Gigaku 2021
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] Development of multi-point Laser Doppler Velocimeter for measuring simultaneous blood velocity distribution2020

    • Author(s)
      Momoko Araki, Shunshuke Akiguchi, Tomoaki Kyouden, Tomoki Tajiri, Tsugunobu Andoh, Tadashi Hachiga
    • Organizer
      The 5th International Conference on “Science of Technology Innovation” 2020 (5th STI-Gigaku 2020)
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research
  • [Presentation] 血流イメージング機能を用いた血流関連疾患判別機能の検討2020

    • Author(s)
      寺林大樹,秋口俊輔,経田僚昭,田尻智紀,安東嗣修,八賀正司
    • Organizer
      Japan ATフォーラム2020
    • Related Report
      2020 Research-status Report
  • [Presentation] 血流速度とその方向成分を考慮した微細流路内の血流イメージング2020

    • Author(s)
      荒木桃子,秋口俊輔,経田僚昭,田尻智紀,安藤嗣修,八賀正司
    • Organizer
      Japan ATフォーラム2020
    • Related Report
      2020 Research-status Report

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Published: 2020-04-28   Modified: 2024-01-30  

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