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Abstract

A beamformer method based on multiple time windows is proposed to estimate the equivalent current sources of different strength and duration from multi-channel magnetocardiography data. This technique of visualizing cardiac electric activities will be a great help to the diagnosis of relevant heart diseases. Feasibility of this beamformer method has been proved by simulation experiments of two known sources. Source estimation results and two-dimensional excitation propagation diagrams of a complete left bundle branch block and a complete right bundle branch block patients during QRS complex are taken to be compared. The revealed characteristics of their electrophysiological phenomena are analyzed.

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Funds:Project supported by the National Natural Science Foundation of China (Grant No. 60771030), the National High-Technology Research and Development Program of China (Grant No. 2008AA02Z308), the Shanghai Science and Technology Development Foundation, China (Grant No. 08JC1421800), the Shanghai Leading Academic Discipline Project, China (Grant No. B004), the Open Project of State Key Laboratory of Function Materials for Information, China (Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences), and the Key Laboratory of Medical Imaging Computing and Computer Assisted Intervention of Shanghai, China (Grant No. 13DZ2272200-2).

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Vol. 63, Issue 24 - 2014-12-20

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