Dipole models for the EEG and MEG

被引:106
作者
Schimpf, PH [1 ]
Ramon, C
Haueisen, J
机构
[1] Washington State Univ, Sch Elect Engn & Comp Sci, Spokane, WA 99202 USA
[2] Univ Washington, Dept Elect Engn, Seattle, WA 98195 USA
[3] Univ Jena, Biomagnet Ctr, D-07743 Jena, Germany
基金
美国国家科学基金会;
关键词
dipole; EEG; finite-element method; MEG; spherical head model;
D O I
10.1109/10.995679
中图分类号
R318 [生物医学工程];
学科分类号
0831 ;
摘要
The current dipole is a widely used source model in forward and inverse electroencephalography and magnetoencephalography applications. Analytic solutions to the governing field equations have been developed for several approximations of the human head using ideal dipoles as the source model. Numeric approaches such as the finite-element and finite-difference methods have become popular because they allow the use of anatomically realistic head models and the increased computational power that they require has become readily available. Although numeric methods can represent more realistic domains, the sources in such models are an approximation of the ideal dipole. In this paper, we examine several methods for representing dipole sources in finite-element models and compare the resulting surface potentials and external magnetic field with those obtained from analytic solutions using ideal dipoles.
引用
收藏
页码:409 / 418
页数:10
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