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

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

中国物理B ›› 2010, Vol. 19 ›› Issue (8): 80601-080601.doi: 10.1088/1674-1056/19/8/080601

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

华宁¹, 唐雪正¹, 陆宏¹, 唐发宽¹, 王倩², 马平³

(1)Department of Cardiology, the 309th Hospital of PLA, Beijing 100091, China; (2)Department of Cardiology, the 309th Hospital of PLA, Beijing 100091, China;Department of Physics, State Key Laboratory for Arti cial Microstructure and Mesoscopic Physics, Peking University, Beijing 100871, China; (3)Department of Physics, State Key Laboratory for Arti cial Microstructure and Mesoscopic Physics, Peking University, Beijing 100871, China

收稿日期:2009-08-24 修回日期:2010-01-22 出版日期:2010-08-15 发布日期:2010-08-15
基金资助:
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).

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

Wang Qian(王倩)^a)b), Hua Ning(华宁)^a), Tang Xue-Zheng(唐雪正)^a), Lu Hong(陆宏)^a), Ma Ping(马平)^b)†, and Tang Fa-Kuan(唐发宽)^a)‡

^a Department of Cardiology, the 309th Hospital of PLA, Beijing 100091, China; ^b Department of Physics, State Key Laboratory for Arti cial Microstructure and Mesoscopic Physics, Peking University, Beijing 100871, China

Received:2009-08-24 Revised:2010-01-22 Online:2010-08-15 Published:2010-08-15
Supported by:
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).

摘要/Abstract

摘要： 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.

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.

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

中图分类号: (Cardiac dynamics)

87.19.Hh

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)

王倩, 华宁, 唐雪正, 陆宏, 马平, 唐发宽. The forward and inverse problem of cardiac magnetic fields based on concentric ellipsoid torso-heart model[J]. 中国物理B, 2010, 19(8): 80601-080601.

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[J]. Chin. Phys. B, 2010, 19(8): 80601-080601.

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

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

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