Computational imaging of the cardiac activities using magnetocardiography

Bhat, Vikas R and Anitha, H (2020) Computational imaging of the cardiac activities using magnetocardiography. Journal of Medical Engineering & Technology, 43 (7). pp. 401-410. ISSN 0309-1902

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The electrical impulses of the heart will generate a tiny magnetic field outside the thorax that is measured as Magnetocardiographic signals. The challenging study is to estimate the cardiac activities in terms of depolarisation and repolarization maps from the measured signals called as inverse problem. This is computed only if one has solved generic or subject- specific prior models using the anatomical structures of the myocardium, the torso and the detectors called as forward problem. In this study, the Discretised heart is priorily assumed as the dipolar sources forming a double layer. The thorax structure modelled with finite element meshes is considered in the forward study. The magnetocardiographic data are simulated using uniform double layer model representing transmembrane distribution on the epicardium and endocardium. Using this data, the activation maps are non-invasively imaged on the heart surface using Tikhonov’s regularisation technique. The inverse study is extended to reconstruct the depolarisation sequences of the abnormal cases.

Item Type: Article
Uncontrolled Keywords: Forward problem; magnetocardiography; transfer matrix; Tikhonov regularisation; inverse problem
Subjects: Engineering > MIT Manipal > Electronics and Communication
Depositing User: MIT Library
Date Deposited: 30 Oct 2020 05:08
Last Modified: 30 Oct 2020 05:08

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