Abstract

Abstract We report our recent work to set up a multi-channel high temperature superconducting (HTS) radio-frequency (rf) SQUID gradiometer and to perform adult and fetal magnetocardiography (MCG). We have compared the adult MCG measurement results using a magnetometer and different gradiometers in a standard magnetically shielded room. The special requirements of a system for fMCG measurements will be discussed. We show that our multi-channel HTS rf SQUID gradiometers are capable of recording the cardiac activity of two fetuses (31st and 33rd week of gestation) in real-time.

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