Validation of the Two-Level Approach for the Solution of the EEG Inverse Problem in an Anisotropic Realistic Head Model

Author

Crevecoeur, Guillaume ; Hallez, Hans ; Dupré, Luc ; Van de Walle, Rik ; Boon, Paul ; Lemahieu, Ignace

Author_Institution

Dept. of Energy, Ghent Univ., Ghent

Volume

45

Issue

3

fYear

2009

fDate

3/1/2009 12:00:00 AM

Firstpage

1670

Lastpage

1673

Abstract

The electrical activity of a neurological epileptic disorder can be determined in a noninvasive way by analyzing the electroencephalogram (EEG). The EEG source localization procedure requires the solution of an inverse problem. We implemented the two-level inverse algorithm, which combines the computational efficiency of the semi-analytical three-shell spherical model with the accuracy of the anisotropic realistic head model. This paper mainly deals with the implementation and the validation of the numerical two-level inverse algorithm using an anisotropic head model. Results obtained from the EEG source localization are compared with measurements of depth electrodes. The results show the fast localization and noise robustness of the numerical procedure.

Keywords

electroencephalography; inverse problems; medical signal processing; neurophysiology; EEG; anisotropic realistic head model; electroencephalogram; inverse problem; neurological epileptic disorder; source localization; two-level approach; Electroencephalogram (EEG) source localization; inverse problem; two-level optimization;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2009.2012773

Filename

4787340