High-Tc SQUID gradiometer system for magnetocardiography in an unshielded environment

S. H. Liao, S. C. Hsu, C. C. Lin, H. E. Horng, J. C. Chen, M. J. Chen, C. H. Wu, H. C. Yang

研究成果: 雜誌貢獻Conference article

23 引文 斯高帕斯(Scopus)


We set up an electronic gradiometer for magnetocardiography (MCG) in an unshielded environment. The electronically balanced gradiometer consists of high-temperature radio-frequency superconducting quantum interference device (rf SQUID) magnetometers. The rf SQUID magnetometers are arranged to form the electronic first-order, four-vector gradiometer, or second-order gradiometer. The output of the MCG signal was filtered by a band pass (1-30 Hz) and power line filters. We can reduce the noise to ∼1 pT Hz-1/2 at 1 Hz for second-order or four-vector gradiometers. Two-dimensional MCG imaging is demonstrated. The results are discussed with data measured in the moderate magnetically shielded environment.

頁(從 - 到)1426-1429
期刊Superconductor Science and Technology
出版狀態已發佈 - 2003 十二月 1
事件ISEC 2003, International Superconducting Electronics Conference - Sydney,NSW, 澳大利亚
持續時間: 2003 七月 72003 七月 11


ASJC Scopus subject areas

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