An iterative algorithm for myocardial activation time imaging

被引：34

作者：

Modre, R ^{[1
]}

Tilg, B ^{[1
]}

Fischer, G ^{[1
]}

Wach, P ^{[1
]}

机构：

[1] Graz Tech Univ, Inst Biomed Engn, A-8010 Graz, Austria

来源：

COMPUTER METHODS AND PROGRAMS IN BIOMEDICINE | 2001年 / 64卷 / 01期

基金：

奥地利科学基金会;

关键词：

inverse problem; magnetocardiography; imaging; activation time map;

D O I：

10.1016/S0169-2607(00)00085-7

中图分类号：

TP39 [计算机的应用];

学科分类号：

081203 ; 0835 ;

摘要：

An iterative algorithm based on a general regularization scheme for nonlinear ill-posed problems in Hilbert scales (method A) is applied to the magnetocardiographic inverse problem imaging the surface myocardial activation time map. This approach is compared to an algorithm using an optimization routine for nonlinear ill-posed problems based on Tikhonov's approach of second order (method B). Method A showed good computational performance and the scheme for determining the proper regularization parameter lambda was found to be easier than in case of method B. The formulation is applied to magnetocardiographic recordings from a patient suffering from idiopathic ventricular tachycardia in which a sinus rhythm sequence was followed by a ventricular extrasystolic beat. (C) 2001 Elsevier Science Ireland Ltd, All rights reserved.

引用

页码：1 / 7

页数：7

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