Inverse computation for cardiac sources using single current dipole and current multipole models

被引:9
作者
Wang Qian [1 ]
Ma Ping [1 ]
Lu Hong [2 ]
Tang Xue-Zheng [2 ]
Hua Ning [2 ]
Tang Fa-Kuan [2 ]
机构
[1] Peking Univ, Dept Phys, State Key Lab Artificial Microstruct & Mesoscop P, Beijing 100871, Peoples R China
[2] 309th Hosp PLA, Dept Cardiol, Beijing 100091, Peoples R China
基金
中国国家自然科学基金; 国家高技术研究发展计划(863计划);
关键词
magnetocardiography; inverse computation; cardiac source model; ADAPTIVE NOISE CANCELLATION; LEAST-SQUARES ESTIMATION; MAGNETIC SOURCE IMAGES; C RF SQUID; FIELDS;
D O I
10.1088/1674-1056/18/12/072
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
Two cardiac functional models are constructed in this paper. One is a single current model and the other is a current multipole model. Parameters denoting the properties of these two models are calculated by a least-square fit to the measurements using a simulated annealing algorithm. The measured signals are detected at 36 observation nodes by a superconducting quantum interference device (SQUID). By studying the trends of position, orientation and magnitude of the single current dipole model and the current multipole model in the QRS complex during one time span and comparing the reconstructed magnetocardiography (MCG) of these two cardiac models, we find that the current multipole model is a more appropriate model to represent cardiac electrophysiological activity.
引用
收藏
页码:5566 / 5574
页数:9
相关论文
共 18 条
[1]   EFFECT OF INHOMOGENEITIES ON APPARENT LOCATION AND MAGNITUDE OF A CARDIAC CURRENT DIPOLE SOURCE [J].
ARTHUR, RM ;
GESELOWITZ, DB .
IEEE TRANSACTIONS ON BIOMEDICAL ENGINEERING, 1970, BM17 (02) :141-+
[2]   Comparability of measurement results obtained with multi-SQUID-systems of different sensor configurations [J].
Burghoff, M ;
Steinhoff, U ;
Haberkorn, W ;
Koch, H .
IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY, 1997, 7 (02) :3465-3468
[3]   MAGNETIC-FIELDS OF A DIPOLE IN SPECIAL VOLUME CONDUCTOR SHAPES [J].
CUFFIN, BN ;
COHEN, D .
IEEE TRANSACTIONS ON BIOMEDICAL ENGINEERING, 1977, 24 (04) :372-381
[4]  
HABERKORN W, 1992, BIOMED TECH, V37, P156
[5]   INTERPRETING MAGNETIC-FIELDS OF THE BRAIN - MINIMUM NORM ESTIMATES [J].
HAMALAINEN, MS ;
ILMONIEMI, RJ .
MEDICAL & BIOLOGICAL ENGINEERING & COMPUTING, 1994, 32 (01) :35-42
[6]   AN OPTIMAL CONSTRAINED LINEAR INVERSE METHOD FOR MAGNETIC SOURCE IMAGING [J].
HUGHETT, P .
ANNALS OF BIOMEDICAL ENGINEERING, 1995, 23 (04) :506-523
[7]   On MEG forward modelling using multipolar expansions [J].
Jerbi, K ;
Mosher, JC ;
Baillet, S ;
Leahy, RM .
PHYSICS IN MEDICINE AND BIOLOGY, 2002, 47 (04) :523-555
[8]   Magnetic field mapping of cardiac electrophysiological function [J].
Koch, H ;
Haberkorn, W .
PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES, 2001, 359 (1783) :1287-1298
[9]   Adaptive noise cancellation for SQUID-based magnetocardiogram [J].
Liu, XY ;
Xie, BQ ;
Dai, YD ;
Wang, FR ;
Li, ZZ ;
Ma, P ;
Xie, FX ;
Yang, T ;
Nie, RJ .
ACTA PHYSICA SINICA, 2005, 54 (04) :1937-1942
[10]   Large effective area high Tc rf SQUID [J].
Liu, XY ;
Xie, FX ;
Meng, SC ;
Ma, P ;
Yang, T ;
Nie, RJ ;
Wang, SZ ;
Wang, FR ;
Dai, YD .
ACTA PHYSICA SINICA, 2003, 52 (10) :2580-2583