Forward and inverse problem for cardiac magnetic field and electric potential using two boundary element methods  

作　　者：唐发宽 王倩 华宁 唐雪正 陆宏 马平 

机构地区：[1]Department of Cardiology,the 309th Hospital of PLA [2]Department of Physics,State Key Laboratory for Artificial Microstructure and Mesoscopic Physics,Peking University

出　　处：《Chinese Physics B》2010年第12期144-153,共10页中国物理B（英文版）

基　　金：Project supported by the State Key Development Program for Basic Research of China (Grant No. 2006CB601007);the National Natural Science Foundation of China (Grant No. 10674006);the National High Technology Research and Development Program of China (Grant No. 2007AA03Z238)

摘　　要：This paper discusses the forward and inverse problem for cardiac magnetic fields and electric potentials. A torso-heart model established by boundary element method （BEM） is used for studying the distributions of cardiac magnetic fields and electric potentials. Because node-to-node and triangle-to-triangle BEM can lead to discrepant field distributions, their properties and influences are compared. Then based on constructed torso-heart model and supposed current source functional model-current dipole array, the magnetic and electric imaging by optimal constrained linear inverse method are applied at the same time. Through figure and reconstructing parameter comparison, though the magnetic current dipole array imaging possesses better reconstructing effect, however node-to-node BEM and triangleto-triangle BEM make little difference to magnetic and electric imaging.This paper discusses the forward and inverse problem for cardiac magnetic fields and electric potentials. A torso-heart model established by boundary element method （BEM） is used for studying the distributions of cardiac magnetic fields and electric potentials. Because node-to-node and triangle-to-triangle BEM can lead to discrepant field distributions, their properties and influences are compared. Then based on constructed torso-heart model and supposed current source functional model-current dipole array, the magnetic and electric imaging by optimal constrained linear inverse method are applied at the same time. Through figure and reconstructing parameter comparison, though the magnetic current dipole array imaging possesses better reconstructing effect, however node-to-node BEM and triangleto-triangle BEM make little difference to magnetic and electric imaging.

关 键 词：cardiac magnetic imaging cardiac electric imaging boundary element method torsoheart model 

分 类 号：O441[理学—电磁学]