Dipole source localization by means of maximum likelihood estimation I.: Theory and simulations

被引：53

作者：

Lütkenhöner, B ^{[1
]}

机构：

[1] Univ Munster, Inst Expt Audiol, D-48129 Munster, Germany

来源：

ELECTROENCEPHALOGRAPHY AND CLINICAL NEUROPHYSIOLOGY | 1998年 / 106卷 / 04期

关键词：

dipole source localization; maximum-likelihood estimation; magnetoencephalography; localization errors; random dipoles;

D O I：

10.1016/S0013-4694(97)00140-5

中图分类号：

R318 [生物医学工程];

学科分类号：

0831 ;

摘要：

By analyzing simulated neuromagnetic recordings with a 37 channel magnetometer system, it was shown that the accuracy of a dipole source localization is considerably improved if the standard least-squares fit procedure is replaced by a maximum likelihood estimation accounting for the covariances of the noise in the measurement channels. Spatially correlated noise was generated by random dipoles homogeneously distributed in a sphere representing the brain. The study suggests that a maximum likelihood estimation reduces the standard deviations of the estimated dipole parameters by roughly a factor of two. (C) 1998 Elsevier Science ireland Ltd.

引用

页码：314 / 321

页数：8

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