スピン交換光ポンピングによる131Xeの超偏極と極低磁場における核磁気共鳴信号の増大

カテゴリ: 論文誌(論文単位)

グループ名: 【C】電子・情報・システム部門

発行日: 2017/04/01

タイトル(英語): Increase of Nuclear Magnetic Resonance Signal in Ultra-low-field by Hyperpolarization of 131Xe by Spin-exchange Optical Pumping

著者名: 武田　俊（北里大学大学院医療系研究科），熊谷　寛（北里大学大学院医療系研究科）

著者名(英語): Shun Takeda (Graduate School of Medical Sciences, Kitasato University), Hiroshi Kumagai (Graduate School of Medical Sciences, Kitasato University)

キーワード: 核磁気共鳴イメージング(MRI)，極低磁場MRI，スピン交換光ポンピング，超偏極131Xe　　Magnetic resonance imaging (MRI)，Ultra-low-field MRI，Spin-exchange optical pumping，Hyperpolarized 131Xe

要約(英語): Magnetic resonance imaging (MRI) has been used in clinical as major tomographic inspection with CT scans. Compared with CT, MRI has a number of advantages for example no radiation exposure. However, MRI has also disadvantages e. g. large size, high cost and never use to patients who have implant devices or metals because have to use strong field. Therefore, ultra-low-field MRI (ULF-MRI) has attracted attention because of usage of ultra-low fields such as earth field about 40∼50 μT. But there is a fatal weakness of ULF-MRI which SN ratio decreases. In this paper we show that spin-exchange optical pumping (SEOP) can increase 131Xe nuclear magnetic resonance (NMR) signals. We also show that SEOP is possible at very low power LASER with field in pulse sequence of NMR measurement.

本誌: 電気学会論文誌C（電子・情報・システム部門誌） Vol.137 No.4 （2017） 特集：量子・情報・エレクトロニクス医療応用

本誌掲載ページ: 604-606 p

原稿種別: 論文／日本語

電子版へのリンク: https://www.jstage.jst.go.jp/article/ieejeiss/137/4/137_604/_article/-char/ja/