Why the study?
Does magnetocardiography with 4He vector optically pumped magnetometers at room temperature provide comparable cardiac cycle signals to reference electrocardiograms in healthy subjects?
Does magnetocardiography with 4He vector optically pumped magnetometers at room temperature provide comparable cardiac cycle signals to reference electrocardiograms in healthy subjects?
This proof-of-concept study demonstrates the feasibility of using room-temperature 4He vector optically pumped magnetometers for magnetocardiography, yielding signals comparable to standard ECG.
Demonstrates the feasibility of room-temperature magnetocardiography; leaves open whether this noninvasive technology.
In this paper, we present a proof of concept study which demonstrates for the first time the possibility of recording magnetocardiography (MCG) signals with 4 He vector optically pumped magnetometers (OPM) operated in a gradiometer mode. Resulting from a compromise between sensitivity, size and operability in a clinical environment, the developed magnetometers are based on the parametric resonance of helium in a zero magnetic field. Sensors are operated at room temperature and provide a tri-axis vector measurement of the magnetic field. Measured sensitivity is around 210 f T (√Hz) −1 in the bandwidth (2 Hz; 300 Hz). MCG signals from a phantom and two healthy subjects are successfully recorded. Human MCG data obtained with the OPMs are compared to reference electrocardiogram recordings: similar heart rates, shapes of the main patterns of the cardiac cycle ( P / T waves, QRS complex) and QRS widths are obtained with both techniques.
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Morales et al. (2017) studied this question.
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