Noise Rejection Method for Magnetic Noise from Wire Using ICA for Magnetocardiogram
Koichiro KOBAYASHI, M. Yoshizawa, Kenji Nakai, Y. Uchikawa · IEEJ Transactions on Fundamentals and Materials · 2006
In magnetocardiogram (MCG) measurements, magnetic noise from the wire used to suture the sternum after heart surgery becomes a problem. Independent component analysis is effective as one method of noise rejection.In this study, MCG measurements were made with the wire attached to a normal subject and with the wire not attached. We performed signal processing by independent component analysis in order to reduce the effect of magnetic noise from the wire. Comparison of the waveforms after this signal processing with waveforms where the wire was not attached, clearly showed that magnetic noise from the wire was reduced.This result clearly shows that independent component analysis is effective for removal of magnetic noise from the wire.