Comparative analysis of current and magnetic multipole graphical models
ABSTRACT
In recent year, a multipole graphical model, which is constructed by using individual MCG measurements based on the equivalent current dipole (ECD) or equivalent magnetic dipole (EMD) source model, has been developed with the aim of instead of the volume conductor model in the inverse solution of cardiac source estimation. In this paper, two graphical models known as the double magnetic dipole source model (DMD) and the dual current dipole source model (DCD) are introduced. The simulation results and the comparison of two evaluation criteria, i.e. average GOF (Goodness of Fit) and average RMSE (Root Mean Square Error), indicated that both multipole graphical models can provide a good representation of dynamic magnetic field from the noninvasively detected MCG- recordings, even when the heart is of the dilation. The time-averaged sources localization error and the RMSE for both models are demonstrated, and the characteristic of two multipole models is discussed.
In recent year, a multipole graphical model, which is constructed by using individual MCG measurements based on the equivalent current dipole (ECD) or equivalent magnetic dipole (EMD) source model, has been developed with the aim of instead of the volume conductor model in the inverse solution of cardiac source estimation. In this paper, two graphical models known as the double magnetic dipole source model (DMD) and the dual current dipole source model (DCD) are introduced. The simulation results and the comparison of two evaluation criteria, i.e. average GOF (Goodness of Fit) and average RMSE (Root Mean Square Error), indicated that both multipole graphical models can provide a good representation of dynamic magnetic field from the noninvasively detected MCG- recordings, even when the heart is of the dilation. The time-averaged sources localization error and the RMSE for both models are demonstrated, and the characteristic of two multipole models is discussed.
Cite this paper
nullJiang, S. , Bing, L. , Dong, J. , Chi, M. , Wang, W. and Zhang, L. (2009) Comparative analysis of current and magnetic multipole graphical models. Journal of Biomedical Science and Engineering, 2, 612-616. doi: 10.4236/jbise.2009.28088.
nullJiang, S. , Bing, L. , Dong, J. , Chi, M. , Wang, W. and Zhang, L. (2009) Comparative analysis of current and magnetic multipole graphical models. Journal of Biomedical Science and Engineering, 2, 612-616. doi: 10.4236/jbise.2009.28088.
References
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[1] D. Wu, H. C. Tsai, B. He. (1999) On the estimation of the Laplacian electrocardiogram during ventricular activa- tion. Ann. Biomed. Eng., 27, 731–745. [2] J. Haueisen, J. Schreiber, H. Brauer, and T. R. Kn?sche, (2002) Dependence of the inverse solution accuracy in magnetocardiography on the boundary-element discreti- zation. IEEE Transactions On Magnetics, 38(2). [3] S. Ohyu, Y. Okamoto, S. Kuriki. (2000) Use of the ventricular propagated excitation model in the magne- tocar-diographic inverse problem for reconstruc tion of electrophysiological properties. IEEE Transactions on Biomedical Engineering, 49(6). [4] S. Q. Jiang, L. Zhang, M. Chi, M. Luo, L. M. Wang. (2008) Dipole source localization by means of simplified double magnetic dipole model. International Journal of Bioelectromagnetism (IJBEM), 10(2). [5] S. Jiang, M. Chi, L. Zhang, M. Luo, L. Wang. (2007) Dipole source localization in magnetocar diography. Proceedings of 2007 Joint Meeting of the 6th Inter- national Symposium on Noninvasive Functional Source Imaging of the Brain and Heart. [6] M. Chi, S. Jiang, L. Zhang. (2008) Graphical model of cardiac electromagnetic source. International Conference on Bioinformatics and Biomedical Engineering (ICBBE’ 08). [7] S. Jiang, J. Dong, M. Chi, and W. Wang. (2008) A graphical model for the cardiac multi-dipole sources. Proceedings of the 5th International conference on Information Technology and Application in Biomedicine (ITAB’08), 434–436. [8] S. Jiang, W. Y. Wang, J. M. Dong, and A. L. Li. (2008) modeling of bioelectrical activity by means of measured mcg data. Biomagetism-Transdisciplinary Research and Exploration, 241–243. [9] W. Andra and H. Nowak. (1998) Magnetism in medicine. Germany, WILEY-VCH. [10] B. He. (2004) Modeling and imaging of bioelectrical activity principles and applications. Kluwer Academic/ Plenum Publishers, 161–162.