Fetal magnetocardiography: clinical relevance and feasibility

H.J.M. ter Brake, A.P. Rijpma, J.G. Stinstra, H.J.R. Borgmann, H.J. Holland, H.J.G. Krooshoop, M.J. Peters, J. Flokstra, H.W.P. Quartero, H. Rogalla

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We investigated the feasibility of a high-Tc SQUID system for fetal magnetocardiography (fetal MCG) aiming at a system without a magnetically shielded room and cooled by a cryocooler. The targeted SQUID resolution was 50 fT/√Hz (1–100 Hz). The research was performed along three lines: environmental noise suppression, cooling and low-Tc experiments. Environmental noise can be suppressed by forming second-order gradiometers from individual magnetometers. Concerning cooling, we investigated the applicability of commercially available coolers. In the low-Tc experiments, the medical relevance of fetal MCG was clearly shown. However, they also indicated that, in order to fully exploit the medical potential, the targeted resolution has to be 10 fT/√Hz. This increased resolution, in combination with the required high reliability of the sensors, will be hard to realize in high-Tc technology. This paper describes the results of the project and discusses the feasibility of a clinical system.
Original languageEnglish
Pages (from-to)10-17
Number of pages8
JournalPhysica C
Issue number1-4
Publication statusPublished - 2002


  • Fetal magnetocardiography
  • METIS-206778
  • IR-60320
  • Cryocooler
  • Noise suppression

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