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

*此作品的通信作者

研究成果: 雜誌貢獻會議論文同行評審

24 引文 斯高帕斯(Scopus)

摘要

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.

原文英語
頁(從 - 到)1426-1429
頁數4
期刊Superconductor Science and Technology
16
發行號12
DOIs
出版狀態已發佈 - 2003 十二月
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

  • 陶瓷和複合材料
  • 凝聚態物理學
  • 金屬和合金
  • 電氣與電子工程
  • 材料化學

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