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Development and clinical application of minimally invasive myocardial CT perfusion imaging for optimal myocardial ischemia assessment

Research Project

Project/Area Number 20K16760
Research Category

Grant-in-Aid for Early-Career Scientists

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

Principal Investigator

Tanabe Yuki  愛媛大学, 医学部附属病院, 助教(病院教員) (70836189)

Project Period (FY) 2020-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Fiscal Year 2021: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2020: ¥390,000 (Direct Cost: ¥300,000、Indirect Cost: ¥90,000)
Keywordsmyocardial perfusion / 心筋虚血 / Static CT perfusion / Dynamic CT perfusion / Myocardial perfusion / Coronary artery disease / Noise reduction / Filter / Iterative reconstruction / 心筋CT perfusion
Outline of Research at the Start

虚血性心疾患の診断と治療方針の決定においては、冠動脈狭窄評価と心筋虚血評価の両者が重要である。我々はDynamic CT perfusion(CTP)を用いた心筋灌流評価法の有用性を報告してきた。しかし、Dynamic CTPには比較的高い被ばくと超多列化CTが必要であり、臨床普及には制限があった。一方、1心時相のみ撮影するStatic CTPにおいては最適な撮影/評価法が定まっていないのが現状である。本研究では、Static CTP撮影の最適化と定量評価法を開発し、Dynamic CTPと同等の診断能をもった低侵襲な心筋灌流評価法として心筋虚血診断への臨床応用を行う。

Outline of Final Research Achievements

In this study, we developed an optimized method for myocardial static computed tomography perfusion (CTP) imaging and a new quantitative evaluation technique (MPR; Myocardial Perfusion Ratio to the Aorta), and evaluated the feasibility in the diagnosis of ischemic heart disease. This study included patients suspected of ischemic heart disease who underwent both myocardial CTP scan and coronary angiography (CAG). By using a "Boost scan" in the dynamic scan, both static and dynamic CTP data were collected in a single CTP scan. In the diagnosis of ischemic heart disease, there was no significant difference between dynamic and static CTP imaging. Regarding the radiation exposure, it was estimated that static scans resulted in significantly lower radiation exposure than dynamic scans.

Academic Significance and Societal Importance of the Research Achievements

本研究では、心筋Static CTPにおいては従来の定性評価に加え、MPRを用いた定量評価を併用することで診断能が向上し、心筋Dynamic CTPより低被ばく、かつ同等の精度で虚血性心疾患の評価ができる可能性が示唆された。Static CTPはDynamic CTPと比較してCT装置に関する制限が少なく、より低侵襲に心筋虚血評価を行えるということは、心筋CTP検査の臨床普及および患者負担の軽減に寄与するものと思われる。

Report

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

    (5 results)

All 2023 2022 2021 2020

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

  • [Journal Article] A Novel Quantitative Parameter for Static Myocardial Computed Tomography: Myocardial Perfusion Ratio to the Aorta.2022

    • Author(s)
      Kouchi Takanori, Tanabe Yuki, Takemoto Takumasa, Yoshida Kazuki, Yamamoto Yuta, Miyazaki Shigehiro, Fukuyama Naoki, Nishiyama Hikaru, Inaba Shinji, Kawaguchi Naoto, Kido Tomoyuki, Yamaguchi Osamu, Kido Teruhito.
    • Journal Title

      Journal of Clinical Medicine

      Volume: 25;11(7) Issue: 7 Pages: 1816-1816

    • DOI

      10.3390/jcm11071816

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Clinical application of four-dimensional noise reduction filtering with a similarity algorithm in dynamic myocardial computed tomography perfusion imaging2020

    • Author(s)
      Kouchi Takanori、Tanabe Yuki、Smit Ewoud J.、Kido Teruhito、Kurata Akira、Kouchi Yoshihiro、Nishiyama Hikaru、Uetani Teruyoshi、Ikeda Shuntaro、Yamaguchi Osamu、Prokop Mathias、Mochizuki Teruhito
    • Journal Title

      The International Journal of Cardiovascular Imaging

      Volume: 36 Issue: 9 Pages: 1781-1789

    • DOI

      10.1007/s10554-020-01878-6

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Presentation] Direct Comparison between Static CTP and Dynamic CTP for Detecting Obstructive Coronary Artery Disease.2023

    • Author(s)
      Tomoro Morikawa, Kazuki Yoshida, Yuki Tanabe, Takaaki Hosokawa, Yuta Yamamoto, Natsumi Kuwahara, Hikaru Nishiyama, Tomoyuki Kido, Teruhito Kido
    • Organizer
      18th Annual Scientific Meeting of the Society of Cardiovascular Computed Tomography
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Diagnostic accuracy of myocardial enhancement ratio to aorta assumed static computed tomography perfusion for identification of myocardial ischemia.2021

    • Author(s)
      Takanori Kouchi, Yuki Tanabe, Takaaki Hosokawa, Yuta Yamamoto, Kazuki Yoshida, Takuya Matsuda, Naoto Kawaguchi, Tomoyuki Kido, Akira Kurata, Teruhito Kido.
    • Organizer
      RSNA
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] ダイナミック心筋CT perfusion検査における4D similarity filterを用いた被曝低減の可能性について2021

    • Author(s)
      山本雄太、田邊裕貴、河内孝範、吉田和樹、桑原奈都実、倉田聖、城戸倫之、城戸輝仁、上谷晃由、山口修、中島沙記、中野翔太
    • Organizer
      第31回心血管画像動態学会
    • Related Report
      2020 Research-status Report

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Published: 2020-04-28   Modified: 2025-03-27  

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