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. 2019 Aug 9;8(16):e013436. doi: 10.1161/JAHA.119.013436

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© 2019 The Authors and QuSpin, Inc. Published on behalf of the American Heart Association, Inc., by Wiley.

This is an open access article under the terms of the http://creativecommons.org/licenses/by-nc/4.0/ License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited and is not used for commercial purposes.

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A, Photograph of 3D‐printed inverted sensor holder populated with 11 optically pumped magnetometer (OPM) sensors. B, Photograph showing the open end of the cylindrical shield, the sliding patient table, and the OPM sensors. C, OPM recording in cylindrical shield with subject lying prone. D, Superconducting Quantum Interference Device (SQUID) recording in MSR from same subject as in (C) with subject lying on her side. The rhythm strips are 5 seconds in duration. The gray vertical lines are 40 ms apart. MSR indicates magnetically shielded room.