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Title: 超高感度光ポンピング原子磁気センサによるヒト心磁図の計測
Other Titles: Human MCG measurements with an ultrasensitive optically-pumped atomic magnetometer
Authors: 鎌田, 啓吾  KAKEN_name
伊藤, 陽介  kyouindb  KAKEN_id  orcid (unconfirmed)
小林, 哲生  kyouindb  KAKEN_id
Author's alias: KAMADA, Keigo
ITO, Yosuke
Keywords: 原子磁気センサ
Issue Date: Jul-2011
Publisher: 一般社団法人 電子情報通信学会
Journal title: 電子情報通信学会技術研究報告. MBE, MEとバイオサイバネティックス
Volume: 111
Issue: 121
Start page: 71
End page: 76
Abstract: 脳磁図(MEG)や心磁図(MCG)等の生体磁気信号計測は, 生体機能の解明や疾患等の診断に用いられる非侵襲的計測・イメージングモダリティの中でも重要な役割を担っている.我々は生体磁気信号計測を目標として超高感度光ポンピング原子磁気センサシステムを開発している.本研究では, ヒトのMCGを計測する上で十分な感度を有したカリウム原子磁気センサを構築しMCG計測を行った.計測信号に対しては, 原子磁気センサの周波数応答を考慮した波形の復元を行った.得られたMCGの空間分布の結果は, 従来のSQUID磁束計により計測された結果とも一致しており, 光ポンピング原子磁気センサによる生体磁気信号計測の信頼性と実現可能性が示された.
Measurement of biomagnetic fields such as magnetoencephalograms (MEGs) and magnetocardiograms (MCGs) is one of the important non-invasive imaging modalities to investigate biological functions and to diagnose disease. We have developed an ultrasensitive optically-pumped atomic magnetometer for biomagnetic measurements. In this study, human MCGs were measured with a potassium atomic magnetometer. The sensitivity of the atomic magnetometer was definitively sufficient for recording of the human MCGs. The measured signals were recovered by considering the frequency characteristics of the atomic magnetometer. The activity of the human heart estimated with the MCG maps showed good agreements with those measured with SQUID magnetometers. These results demonstrated reliability and feasibility of biomagnetic measurements with optically-pumped atomic magnetometers.
Description: 本文データは学協会の許諾に基づきCiNiiから複製したものである
Rights: copyright ©2011 by IEICE
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