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

Research output: Contribution to journalConference articlepeer-review

9 Citations (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.

Original languageEnglish
Pages (from-to)1383-1386
Number of pages4
JournalSuperconductor Science and Technology
Issue number12
Publication statusPublished - Dec 1 2003
Externally publishedYes
EventISEC 2003, International Superconducting Electronics Conference - Sydney,NSW, Australia
Duration: Jul 7 2003Jul 11 2003

ASJC Scopus subject areas

  • Ceramics and Composites
  • Condensed Matter Physics
  • Metals and Alloys
  • Electrical and Electronic Engineering
  • Materials Chemistry


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