Influence of isotropic skull models on EEG source localization

Author

Montes-Restrepo, Victoria ; van Mierlo, Pieter ; Lopez, Jose D. ; Hallez, Hans ; Vandenberghe, Stefaan

Author_Institution

Fac. of Eng., Ghent Univ., Ghent, Belgium

fYear

2013

fDate

3-7 July 2013

Firstpage

3295

Lastpage

3298

Abstract

We investigated the influence of using simplified skull models on electroencephalogram (EEG) source localization. The simplified skull models were derived from CT and MR images, with isotropic conductivity modeled as either heterogeneous or homogeneous. A total of four simplified head models were compared against a reference model with a skull accurately segmented with CT images. Our results show that the use of a simplified geometry for the skull, can lead to errors of approximately 1 cm for sources located in the central and temporal regions of the brain.

Keywords

biomedical MRI; brain models; computerised tomography; electroencephalography; CT images; EEG source localization; MR images; electroencephalogram source localization; heterogeneous isotropic conductivity; homogeneous isotropic conductivity; image segmentation; isotropic skull models; simplified head models; Atmospheric modeling; Brain models; Computational modeling; Computed tomography; Conductivity; Head;

fLanguage

English

Publisher

ieee

Conference_Titel

Engineering in Medicine and Biology Society (EMBC), 2013 35th Annual International Conference of the IEEE

Conference_Location

Osaka

ISSN

1557-170X

Type

conf

DOI

10.1109/EMBC.2013.6610245

Filename

6610245