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2023 Fiscal Year Final Research Report

Construction of field-switch DNP-MRI

Research Project

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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
Keywords磁気共鳴 / MRI
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.

Free Research Field

生物物理化学

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。

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Published: 2025-01-30  

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