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. 2023 Aug 10;10:1232882. doi: 10.3389/fcvm.2023.1232882

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© 2023 Brisinda, Fenici and Fenici.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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First reported test of a dual-channel scalar field OPMs (geometrics MFAM) arranged as a first-order gradiometer (baseline 5 cm) in the Catholic University Hospital's unshielded BACPIC: (A) Preliminary phantom measurement of a 1 mA current dipole generated by the amagnetic catheter. (B) Comparison between MCG recording and CMI 36-channel MCG mapping (R-wave MF distribution). The similarity of MCG waveforms recorded with the MFAM (B1) and with the SQUID (B2) at the same grid position (white circle onto the MF map) is evident. The amplitude of the MCG signal recorded with the MFAM is higher because the OPMs can be placed closer to the chest. (C) Noise spectra of each MFAM and of the first-order gradiometer.