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Multi-channel magnetocardiogardiography system calibration

Zhang Yong-Sheng Qiu Yang Zhang Chao-Xiang Li Hua Zhang Shu-Lin Wang Yong-Liang Xu Xiao-Feng Ding Hong-Sheng Kong Xiang-Yan

Multi-channel magnetocardiogardiography system calibration

Zhang Yong-Sheng, Qiu Yang, Zhang Chao-Xiang, Li Hua, Zhang Shu-Lin, Wang Yong-Liang, Xu Xiao-Feng, Ding Hong-Sheng, Kong Xiang-Yan
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  • Abstract views:  640
  • PDF Downloads:  438
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Publishing process
  • Received Date:  14 April 2014
  • Accepted Date:  08 July 2014
  • Published Online:  05 November 2014

Multi-channel magnetocardiogardiography system calibration

  • 1. Department of Physics, University of Science and Technology, Beijing 100083, China;
  • 2. State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050, China
Fund Project:  Project supported by the Knowledge Innovation Program of the Chinese Academy of Sciences (Grant No. KGCX2-EW-105), and the One Hundred Person Project of the Chinese Academy of Sciences.

Abstract: The field-to-voltage transfer coefficient (∂ B/∂ V) is an important parameter of the multi-channel superconducting quantum interference device (SQUID) magnetic detecting system. The SQUID devices and the readout circuits have the inevitable differences among different channels, so the accurate calibration of system channels is rather significant. In this paper, We first used the circular PCB coils for 36-channel MCG system calibration, and the other one is based on a traditional method in which a uniform field is produced by square Helmholtz coil. The calibration data show that the results are basically the same. The calibrated ∂ B/∂ V values using circular PCB coils are in a range from 1.46-1.73 pT·mV-1. And those of square Helmholtz coils are mostly within a range from 1.56-1.64 pT·mV-1.

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