An improved method for dipole modeling in EEG-based source localization
Paper in proceeding, 2009
The inverse problem in EEG-based source localization
is to determine the location of the brain sources that are
responsible for the measured potentials at the scalp electrodes.
The brain sources are usually modeled as current dipoles which
lead to a singularity in the right-hand side of the governing Poisson’s
equation. Subtraction methods have been proposed as a
remedy and in this paper an improved subtraction method for
modeling the dipoles is presented. The accuracy is demonstrated
for radial and tangential sources in layered sphere models and is
to the best of the authors’ knowledge superior to previous methods
for superficial sources. An additional advantage is that it
produces a right hand side with few non-zeros which is beneficial
for efficient solution of the inverse problem.
epilepsy
source reconstruction
finite element method
EEG
Author
Fredrik Edelvik
Fraunhofer-Chalmers centrum for industrimatematik - FCC
Björn O Andersson
Fraunhofer-Chalmers centrum for industrimatematik - FCC
Stefan Jakobsson
Fraunhofer-Chalmers centrum for industrimatematik - FCC
Stig Larsson
Chalmers, Mathematical Sciences, Mathematics
University of Gothenburg
Mikael Persson
Chalmers, Signals and Systems, Signalbehandling och medicinsk teknik
Yazdan Shirvany
Chalmers, Signals and Systems, Signalbehandling och medicinsk teknik
International Federation for Medical and Biological Engineering Proceedings
1680-0737 (ISSN)
Vol. 25 9 146-1499783642038884 (ISBN)
Subject Categories (SSIF 2011)
Medical Laboratory and Measurements Technologies
Computational Mathematics
DOI
10.1007/978-3-642-03889-1-40
ISBN
9783642038884