The forward and inverse problem of cardiac magnetic fields based on concentric ellipsoid torso-heart model

doi:10.1088/1674-1056/19/8/080601

Abstract This paper constructs a concentric ellipsoid torso-heart model by boundary element method and investigates the impacts of model structures on the cardiac magnetic fields generated by both equivalent primary source—a current dipole and volume currents. Then by using the simulated magnetic fields based on the torso-heart model as input, the cardiac current sources—an array of current dipoles by optimal constrained linear inverse method are constructed. Next, the current dipole array reconstruction considering boundaries are compared with that in an unbounded homogeneous medium. Furthermore, the influence of random noise on reconstruction is also considered and the reconstructing effect is judged by several reconstructing parameters.

Keywords: concentric ellipsoid torso-heart model boundary element method current dipole array reconstruction optimal constrained linear inverse method

Received: 24 August 2009
Revised: 22 January 2010
Accepted manuscript online:

PACS:	87.19.Hh	(Cardiac dynamics)
	02.30.Zz	(Inverse problems)
	87.19.R-	(Mechanical and electrical properties of tissues and organs)
	87.50.C-	(Static and low-frequency electric and magnetic fields effects)

Fund: 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) and the National High Technology Research and Development Program of China (Grant No. 2007AA03Z238).

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Wang Qian(王倩), Hua Ning(华宁), Tang Xue-Zheng(唐雪正), Lu Hong(陆宏), Ma Ping(马平), and Tang Fa-Kuan(唐发宽) The forward and inverse problem of cardiac magnetic fields based on concentric ellipsoid torso-heart model 2010 Chin. Phys. B 19 080601

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The forward and inverse problem of cardiac magnetic fields based on concentric ellipsoid torso-heart model

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