A 16-channel high-Tc SQUID-magnetometer system for magnetocardiogram mapping

Koichi Yokosawa, Akira Tsukamoto, Daisuke Suzuki, Akihiko Kandori, Tsuyoshi Miyashita, Kuniomi Ogata, Yusuke Seki, Keiji Tsukada


10 被引用数 (Scopus)


A compact, light and easy-to-handle magnetocardiograph (MCG) has been developed. The MCG consists of a sensor array with superconducting-quantum-interference-device magnetometers made of a high-critical temperature superconductor, arranged in a 4 × 4 matrix, and operated in a vertical magnetically shielding cylinder (1.7 m high and 1 m in diameter). Each magnetometer is paired with each of its adjacent magnetometers, and the difference between the respective outputs provides us with a measure of magnetic gradient. This configuration for the electronic gradiometers cancels out the environmental magnetic field noise within the shielding cylinder. We use the data from the multiple gradiometers to construct a current arrow map that describes the distribution of original current vectors in the area being measured. We used the fabricated MCG to record magnetocardiograms of healthy volunteers. The smallest signals, i.e., the P-waves, were clearly detected without averaging. The current arrow maps obtained from the single-beat magnetocardiograms indicate the feasibility of clinical application of this MCG.

ジャーナルSuperconductor Science and Technology
出版ステータスPublished - 12月 1 2003
イベントISEC 2003, International Superconducting Electronics Conference - Sydney,NSW
継続期間: 7月 7 20037月 11 2003

ASJC Scopus subject areas

  • セラミックおよび複合材料
  • 凝縮系物理学
  • 金属および合金
  • 電子工学および電気工学
  • 材料化学


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