Magnetocardiograph based on a 4x4 array of high-temperature superconducting quantum interference devices

被引:15
作者
Yokosawa, K
Kandori, A
Miyashita, T
Suzuki, D
Tsukada, K
Tsukamoto, A
机构
[1] Hitachi Ltd, Cent Res Lab, Tokyo 1858601, Japan
[2] Hitachi Ltd, Adv Res Lab, Tokyo 1858601, Japan
关键词
D O I
10.1063/1.1588737
中图分类号
O59 [应用物理学];
学科分类号
摘要
A magnetocardiograph, consisting of superconducting quantum interference device (SQUID) magnetometers made of a high-critical-temperature (T-c) superconductor and a compact magnetically shielding cylinder, has been developed. We assembled a sensor array of 4x4-matrix-arranged magnetometers which are treated as 24 electronic first-order gradiometers by taking the differences between the outputs in every pair of adjacent magnetometers. Field gradients generated by P waves were estimated from the results for 21 subjects of a conventional magnetocardiograph made of low-T-c SQUID gradiometers. Every gradiometer of the assembled sensor array was then designed to be sufficiently sensitive to detect the field gradient corresponding to the mean P wave. The clear magnetocardiograms obtained without averaging indicate the clinical applicability of the developed magnetocardiograph. (C) 2003 American Institute of Physics.
引用
收藏
页码:4833 / 4835
页数:3
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