Three component magnetic field data

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Abstract
Purpose – To demonstrate the improvement of three-axial magnetic sensors systems for magnetocardiography when using minimum norm solutions (MNS). Design/methodology/approach – The thesis is proved by using figures of merit and by means of repeated numerical simulations, starting from a BEM model for forward calculations. Findings – We found out that both for under-determined and over-determined problems two figures of merit show better performance of a three-axial sensor system when compared with two mono-axial sensor systems. We also showed the positive impact of three component magnetic field data on MNS by means of repeated simulations. Research limitations/implications – The analysis is limited to theoretical sensor systems and can be applied also to realistic measurement set-ups. Noise is considered uncorrelated. The analysis could be carried out with the help of other figures of merit. More refined models for the human body could be adopted. Practical implications – The use of three axial sensor systems is encouraged in the field of magnetocardiography. Originality/value – Numerical analysis of inversion algorithms using three-dimensional magnetic field data in magnetocardiography have been never carried out.

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