TITLE

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

AUTHOR(S)
Yokosawa, Koichi; Kandori, Akihiko; Miyashita, Tsuyoshi; Suzuki, Daisuke; Tsukada, Keiji; Tsukamoto, Akira
PUB. DATE
June 2003
SOURCE
Applied Physics Letters;6/30/2003, Vol. 82 Issue 26, p4833
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
A magnetocardiograph, consisting of superconducting quantum interference device (SQUID) magnetometers made of a high-critical-temperature (T[SUBc])superconductor and a compact magnetically shielding cylinder, has been developed. We assembled a sensor array of 434-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[SUBc] 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.
ACCESSION #
10106455

 

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