A high-Tc dc-SQUID-based single-channel MCG and its performance

查看全文 作　　者：WANG [1]Huiwu;DING [1]Hongsheng;ZHANG [1]Lihua;HUANG [1]Xuguang;CHEN [2]Weichang;WANG [2]Ziqiang;FENG [1]Ji;LIU [1]Yiping;ZHAO [1]Shiping;REN [1]Yufeng;YU [1]Hongwei;XU [1]Fengzhi;WANG [2]Xiaoyin;CHEN [1]Genghua;YANG [1]Qiansheng

机构地区：[1]Institute of Physics,Chinese Academy of Sciences,Beijing 100080,China;[2]China Japan Friendship Institute of Medical Sciences,Beijing 100029,China

出　　处：《Chinese Science Bulletin》索引2002年第47卷第22期,共4页

基　　金：the National Center for R&D on Superconductivity, Chinese Academy of Sciences (Grant No. KJCX2-W4);the Ministry of Science and Technology of China (Grant No. G19990646). 摘　　要：A single-channel high-Tc dc-SQUID magnetometer and gradiometer have been developed to record the magnetic field component perpendicular to the human chest generated by heart-beat. Magnetocardiogram (MCG) measurements have been carried out inside a magnetically shielded room. By sequentially adjusting a non-magnetic patient table with 5 cm pitch in X and Y directions, the field signals on a rectangle grid 5×5 over the chest area were registered in real time trace point by point with a typical dwell time over 30 cardiocycles each. Utilizing standard electrocardiogram (ECG) recordings as timing reference measured simultaneously with the MCG signals, the MCG data were then averaged and combined to form magnetic field patterns every 10 ms or so. Both the current dipole, which is parallel to MCG measuring plane and produces the vertical magnetic field, and its depth were determined as a function of time in a standard way. We have compared the MCG of healthy hearts with that of a heart with right bundle 关键词：HIGH-TC DC-SQUID MAGNETOCARDIOGRAM QRS complex.

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A high-Tc dc-SQUID-based single-channel MCG and its performance

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