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Construction of field-switch DNP-MRI

Research Project

Project/Area Number 21H03800
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 90110:Biomedical engineering-related
Research InstitutionNagasaki International University

Principal Investigator

Ichikawa Kazuhiro  長崎国際大学, 薬学部, 教授 (10271115)

Co-Investigator(Kenkyū-buntansha) 榎本 彩乃  長崎国際大学, 薬学部, 講師 (30826186)
Project Period (FY) 2021-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥17,160,000 (Direct Cost: ¥13,200,000、Indirect Cost: ¥3,960,000)
Fiscal Year 2023: ¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2022: ¥9,100,000 (Direct Cost: ¥7,000,000、Indirect Cost: ¥2,100,000)
Fiscal Year 2021: ¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
Keywords磁気共鳴 / MRI / 高感度 / イメージング / DNP / 装置開発
Outline of Research at the Start

一般的代謝過程に適応で逐次的な計測が可能で、臨床機器へと展開可能な技術要素と感度を有する常温他核種DNP-MRI装置を開発し、疾患モデルに応用することで、代謝過程全般に応用可能な生体代謝リアルタイム分子イメージングの装置の試作実証を行う。試作機を製作後、従来機を用いて代謝動態変化を明らかにしてきた、がん・糖尿病モデル等において手法間比較が可能な前立腺がんモデルの検討により、本手法の有用性を実証する。

Outline of Final Research Achievements

The purpose of this research was to develop and demonstrate real-time molecular imaging technology for biological metabolism that can be applied to various metabolic processes that require time for distribution and metabolism. The developed device is based on a magnetic field switch method using two different magnetic fields. The idea is to combine the high sensitivity achieved by the DNP effect with an MRI measurement magnetic field that can be used for clinical measurements in the future. We prototyped a room-temperature DNP-MRI device using a magnetic field switch that performs DNP excitation and signal detection at different magnetic field intensities, and analyzed its various characteristics.

Academic Significance and Societal Importance of the Research Achievements

近年、極低温核偏極(DNP)迅速溶融法タイプのDNP-MRIが開発され、米国では前立腺癌における代謝動態のリアルタイム計測の臨床研究が行われている。一方で、1回きりの偏極化と数十秒から数分程度の偏極寿命のため、分子プローブの投与から標的臓器への分布、代謝に時間を要する一般的代謝過程には適応困難であり、適用範囲が限定される状況であった。常温DNP-MRIは相対的に低感度であるが、繰り返し励起が可能な手法であり、一般的な代謝課程への適応性が高いと考え、原理実証を行なった。磁場不均一性・ゆらぎ等の影響が示唆されたが、今後の高精度化により実用化が可能であることが示唆された。

Report

(4 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Annual Research Report
  • 2021 Annual Research Report
  • Research Products

    (7 results)

All 2023 2022 2021 Other

All Int'l Joint Research (1 results) Journal Article (1 results) (of which Peer Reviewed: 1 results) Presentation (4 results) (of which Int'l Joint Research: 3 results) Remarks (1 results)

  • [Int'l Joint Research] West Virginia University(米国)

    • Related Report
      2023 Annual Research Report
  • [Journal Article] Research and development of pre-clinical OMRI2022

    • Author(s)
      Enomoto Ayano、Ichikawa Kazuhiro
    • Journal Title

      Antioxidants & Redox Signaling

      Volume: - Issue: 13-15 Pages: 1094-1110

    • DOI

      10.1089/ars.2022.0038

    • Related Report
      2022 Annual Research Report 2021 Annual Research Report
    • Peer Reviewed
  • [Presentation] Novel OMRI cavity resonator optimized for dermatological measurements2023

    • Author(s)
      Enomoto A, Ichikawa K
    • Organizer
      nternational Conference on EPR Spectroscopy and Imaging of Biological Systems
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Quantification of nitroxyl radicals using electrophoresis and OMRI2023

    • Author(s)
      K. Ichikawa, A. Enomoto, N. Kato, N. Shirouzu, and C. Tamura
    • Organizer
      nternational Conference on EPR Spectroscopy and Imaging of Biological Systems
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] in vivo OMRI 計測のための空洞共振器の開発と最適化2022

    • Author(s)
      榎本彩乃,市川和洋
    • Organizer
      第61回電子スピンサイエンス学会年会
    • Related Report
      2022 Annual Research Report
  • [Presentation] Development of dual channel array coil resonator for OMRI.2021

    • Author(s)
      A. Enomoto and K. Ichikawa
    • Organizer
      ISMAR/APNMR/NMRSJ/SEST2021
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Remarks] 長崎国際大学薬学部薬品物理化学研究室

    • URL

      https://niu.biophyschem.jp

    • Related Report
      2023 Annual Research Report

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Published: 2021-04-28   Modified: 2025-01-30  

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