Recording the Distribution of Cardiac Magnetic Fields in Unshielded Earth’s Field

Sun, Chenxi; Wei, Xiao; Ding, Yudong; Zhang, Rui; Li, Meng; Wu, Teng; Peng, Xiang; Chen, Jingbiao; Guo, Hong

doi:10.1109/eftf/ifcs52194.2021.9604275

Cited by 1 publication

(2 citation statements)

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“…In contrast, optically pumped magnetometers (OPMs) can achieve comparable sensitivity with SQUIDs and be cost-effective as well. Nowadays, there is an increasing number of various OPMs being used in noninvasive measurements of cardiac and brain magnetic fields [6, 7, 8, 9].…”

Section: Figurementioning

confidence: 99%

“…Our system (shown in Figure 1A) consists of two amplitude-modulated nonlinear magneto-optical rotation (AM-NMOR) magnetometers as a gradiometer and a set of two-layer three-dimensional (3D) Helmholtz coils to actively adjust and stabilize the magnetic field. The system can work at room temperature and in natural magnetic environments, and has been used in measuring bioelectromagnetic signals [6]. With this system, we record the intestinal magnetic fields of the rabbit and assess the feasibility as a replacement and a complementary method to measure MENG signals.…”

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confidence: 99%

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Monitoring the intestinal magnetic field with optically pumped atomic magnetometers

Sun

Zhao²,

et al. 2022

Preprint

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Research has shown the potential of magnetoenterography (MENG) for detecting intestinal diseases noninvasively with superconducting quantum interference devices (SQUIDs). Nevertheless, these devices need to operate under a cytogenetic environment maintained by liquid helium. In this paper, we record the intestinal magnetic field of a rabbit with optically pumped magnetometers (OPMs) at room temperature. It demonstrates that the OPM-based system has sufficient sensitivity to measure the intestinal magnetic fields of the rabbit, and can be potentially developed into a cost-effective and flexible MENG system.

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