Title: Three-layer-isotropic skull conductivity representation in the EEG forward problem using spherical head models
Authors: Cuartas-Morales, Ernesto
Hallez, Hans
Vanrumste, Bart
Castellanos-Dominguez, German
Issue Date: Aug-2014
Publisher: IEEE
Host Document: IEEE Engineering in Medicine and Biology Society. Conference Proceedings pages:4904-4907
Conference: Annual International Conference of the IEEE Engineering in Medicine and Biology edition:36 location:Chicago date:26-30 Augustus 2014
Abstract: We study the influence of different conductivity models within the framework of electroencephalogram (EEG) source localization on the white matter and skull areas. Particularly, we investigate five different spherical models having either isotropic or anisotropic conductivity for both considered areas. To this end, the anisotropic finite difference reciprocity method is used for solving the EEG forward problem. We evaluate a model of a numeric skull conductivity in terms of the minimum dipole localization/orientation error. As a result, both considered models of the skull reach the lowest dipole localization error (less than 6 mm), namely: i) single anisotropic layer and ii) three isotropic layers (hard bone/spongy bone/hard bone). Additionally, two different electrode configurations (10-20 and 10 - 10 systems) are tested showing that the error decreases almost as much as twice for the latter one though the computational burden significantly increases.
Publication status: published
KU Leuven publication type: IC
Appears in Collections:Computer Science Technology TC, Campus Bruges
Technologiecluster Computerwetenschappen
Electrical Engineering (ESAT) TC, Technology Campus Geel
Technologiecluster ESAT Elektrotechnische Engineering

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