Compact and easy-operation magnetocardiograph with four-channel planar gradiometers

K. Yokosawa, D. Suzuki, A. Tsukamoto, T. Miyashita, A. Kandori, K. Tsukada, K. Takagi


2 被引用数 (Scopus)


A magnetocardiograph (MCG), which consists of a sensor comprising four superconducting-quantum-interference device (SQUID) gradiometers and a magnetic shielding cylinder made of nanocrystalline soft magnetic materials, has been developed. The sensor can be handled easily because the gradiometers are made of high-critical-temperature (Tc) superconductor operated in liquid nitrogen. Further, the shielding cylinder is lightweight (160 kg) and compact (2 m long and 1 m in diameter). The gradiometer balance is high enough (typically 0.1%) for recording magnetocardiograms inside the shielding cylinder, whose shielding factor is -35 dB at 1 Hz. We used the new MCG to record magnetocardiograms of a healthy volunteer at four different positions. From this magnetocardiograms we then obtained a current arrow map, by which mycardium activity can be estimated, at 16 sites (4 × 4 matrix) on the measurement plane. The similarity between the current-arrow map obtained by a conventional MCG and that from the newly developed MCG indicates that the developed compact MCG is also capable of estimating the region of cardiac activity.

ジャーナルAnnual Reports of the Research Reactor Institute, Kyoto University
出版ステータスPublished - 12月 1 2001
イベント23rd Annual International Conference of the IEEE Engineering in Medicine and Biology Society - Istanbul
継続期間: 10月 25 200110月 28 2001

ASJC Scopus subject areas

  • エネルギー工学および電力技術
  • 機械工学


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