A superconducting quantum interference device magnetometer with a room-temperature pickup coil for measuring impedance magnetocardiograms

Akihiko Kandori, Daisuke Suzuki, Koichi Yokosawa, Akira Tsukamoto, Tsuyoshi Miyashita, Keiji Tsukada, Kazumasa Takagi

Research output: Contribution to journalArticlepeer-review

20 Citations (Scopus)

Abstract

To measure an impedance magnetocardiogram (I-MCG) signal, we have developed a superconducting quantum interference device (SQUID) magnetometer with a room-temperature pickup coil. The pickup coil (30-mm diameter) is set outside the cryostat and is connected to the input coil in the SQUID. The noise level of the magnetometer is 90 fT Hz-1/2 at 10 kHz. Using the magnetometer, we measured I-MCG signals (below 15 pT) - which were obtained by applying an ac current (10 kHz) with constant amplitude (7 mA, peak-to-peak) to a subject - from the heart.

Original languageEnglish
Pages (from-to)596-599
Number of pages4
JournalJapanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
Volume41
Issue number2 A
DOIs
Publication statusPublished - Feb 2002
Externally publishedYes

Keywords

  • Flux transformer
  • Impedance-magnetocardiogram
  • Magnetometer
  • Pickup-coil
  • SQUID

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

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