An optical magnetometer using an LMS algorithm can effectively measure magnetocardiography signals in an unshielded environment by suppressing background magnetic noise.
Enables unshielded magnetocardiography; leaves open clinical validation before diagnostic adoption.
This paper demonstrates the concept of an optical magnetometer for magnetocardiography. The magnetometer employs a standard Least-Mean-Squares (LMS) algorithm for heart magnetic field measurement within unshielded environment. Experimental results show that the algorithm can extract a weak heart signal from a much-stronger magnetic noise and detect the P, QRS, and T heart features and completely suppress the common power line noise component at 50 Hz.
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Tiporlini et al. (2013) studied this question.
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