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Estimation of human blood oxygenation using IVIM imaging.

Research Project

Project/Area Number 18K07663
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 52040:Radiological sciences-related
Research InstitutionTohoku University

Principal Investigator

TAMURA Hajime  東北大学, 医学系研究科, 名誉教授 (20333817)

Co-Investigator(Kenkyū-buntansha) 神宮 啓一  東北大学, 医学系研究科, 教授 (00451592)
麦倉 俊司  東北大学, 東北メディカル・メガバンク機構, 教授 (20375017)
大田 英揮  東北大学, 医学系研究科, 准教授 (40586905)
木下 俊文  秋田県立循環器・脳脊髄センター(研究所), 放射線医学研究部, 副病院長 (70314599)
Project Period (FY) 2018-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2021: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2020: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2019: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2018: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Keywords微小流体ファントム / 拡散係数 / 緩和時間 / 腎機能 / 拡散強調画像 / MRI / 酸素代謝 / 血液酸素飽和度 / 尿細管 / 腎血液量 / 血液量 / 血流評価 / IVIM / Diffusion / blood oxygenation
Outline of Final Research Achievements

We investigated whether blood flow and oxygen metabolism in the body could be evaluated using MRI diffusion-weighted images. As basic research, we designed a 3-dimensional unicursal channel phantom to simulate small vessels and obtained diffusion-weighted images with varying infusion rate of water. The signal intensities were compared with theoretical data by numerical computation. Our model may allow for understanding the behavior of IVIM images under various flow conditions and evaluating performance of MRI platforms.
Human studies revealed the nature of the brain and kidney diffusion image data. Although it cannot be said that the oxygen saturation of blood can be surely obtained, suppression of the influence of data noise may be necessary with carefully combining multiple imaging conditions.

Academic Significance and Societal Importance of the Research Achievements

虚血性疾患や腫瘍性疾患の診断や治療において、体内の血流や酸素代謝の評価が有用である。そのためには、これまで、放射性同位元素や造影剤の体内注入が必要とされてきた。この研究では、薬剤注入をせずに、MRI 拡散強調画像を用いて、それらを評価できないかを検討した。基礎的な研究として、体内の血流を模した新しいファントム (MRI用の実験装置) を作成することができた。今後のMRI診断の基礎として利用されることが期待される。

Report

(5 results)
  • 2021 Annual Research Report   Final Research Report ( PDF )
  • 2020 Research-status Report
  • 2019 Research-status Report
  • 2018 Research-status Report
  • Research Products

    (10 results)

All 2022 2021 2020 2019 2018

All Presentation (10 results) (of which Int'l Joint Research: 6 results)

  • [Presentation] Intravoxel incoherent motion imaging of a small-vessel MRI phantom: Preliminary study.2022

    • Author(s)
      Hajime Tamura, Hideki Ota, Tatsuo Nagasaka Ryuichi Mori, Yuki Ichinoseki, Kenichi Funamoto.
    • Organizer
      Joint Annual Meeting ISMRM-ESMRMB & ISMRT 31st Annual Meeting.
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] A small-vessel MRI phantom for quantitative analysis of diffusion-weighted images:validation study with numerical computation.2021

    • Author(s)
      Hajime Tamura, Hideki Ota, Tatsuo Nagasaka, Ryuichi Mori, Chihiro Kato, Kohsuke Gonda and Kenichi Funamoto.
    • Organizer
      2021 ISMRM & SMRT Annual Meeting & Exhibition.
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Intravoxel incoherent motion imaging of the cerebrospinal fluid (脳脊髄液のIVIMイメージング)2021

    • Author(s)
      田村 元, 豊嶋 英仁, 高橋 一広, 松原 佳亮, 中村 和浩, 茨木 正信, 木下 俊文.
    • Organizer
      第49回日本磁気共鳴医学会・第3回アジア磁気共鳴医学会合同大会.
    • Related Report
      2021 Annual Research Report
  • [Presentation] A small-vessel MRI phantom for quantitative analysis of diffusion-weighted images: validation study with numerical computation.2021

    • Author(s)
      Hajime Tamura, Hideki Ota, Tatsuo Nagasaka, Ryuichi Mori, Chihiro Kato, Kohsuke Gonda, and Kenichi Funamoto
    • Organizer
      2021 ISMRM & SMRT Annual Meeting & Exhibition
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research
  • [Presentation] Non-invasive assessment of renal function using intravoxel incoherent motion imaging taking account of renal tubular water and relaxation times.2020

    • Author(s)
      Hajime Tamura, Hideki Ota, Tatsuo Nagasaka, Eikan Mishima
    • Organizer
      ISMRM & SMRT Virtual Conference & Exhibition
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research
  • [Presentation] Non-Gaussian diffusion restriction effect should be taken into account when analyzing IVIM data even with b values less than 1000 [s/mm2].2020

    • Author(s)
      Hajime Tamura, Asari Mami, Fumio Maeyatu
    • Organizer
      第48回日本磁気共鳴医学会大会
    • Related Report
      2020 Research-status Report
  • [Presentation] Renal intravoxel-incoherent-motion analysis with a three-compartment model taking into account the renal tubules.2019

    • Author(s)
      Hajime Tamura, Hideki Ota, Tatsuo Nagasaka
    • Organizer
      ISMRM 27th Annual Meeting & Exhibition
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Assessment of intra-tubular urinary water fraction in the renal tissue with MRI.2019

    • Author(s)
      Hajime Tamura, Tatsuo Nagasaka, Hideki Ota
    • Organizer
      第47回日本磁気共鳴医学会大会
    • Related Report
      2019 Research-status Report
  • [Presentation] Non-Gaussian diffusion restriction effects in intravoxel incoherent motion imaging acquired at b-values below 1000 s/mm2.2018

    • Author(s)
      Hajime Tamura, Hideki 0ta, Tatsuo Nagasaka, Naoki Mori, Shunji Mugikura.
    • Organizer
      Joint Annual Meeting ISMRM-ESMRMB 2018.
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] 脳IVIMイメージングの精度―加算は何回必要か。2018

    • Author(s)
      田村 元、山中一臣、小森芳秋、麦倉俊司、大田英揮。
    • Organizer
      第46回日本磁気共鳴医学会大会
    • Related Report
      2018 Research-status Report

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Published: 2018-04-23   Modified: 2023-01-30  

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