An improved method for dipole modeling in EEG-based source localization
Paper i 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

EEG

finite element method

Författare

Fredrik Edelvik

Stiftelsen Fraunhofer-Chalmers Centrum för Industrimatematik

Björn O Andersson

Stiftelsen Fraunhofer-Chalmers Centrum för Industrimatematik

Stefan Jakobsson

Stiftelsen Fraunhofer-Chalmers Centrum för Industrimatematik

Stig Larsson

Göteborgs universitet

Chalmers, Matematiska vetenskaper, Matematik

Mikael Persson

Chalmers, Signaler och system, Signalbehandling och medicinsk teknik, Biomedicinsk elektromagnetik

Yazdan Shirvany

Chalmers, Signaler och system, Signalbehandling och medicinsk teknik, Biomedicinsk elektromagnetik

International Federation for Medical and Biological Engineering Proceedings

1680-0737 (ISSN)

Vol. 25 146-149

Ämneskategorier

Medicinsk laboratorie- och mätteknik

Beräkningsmatematik

DOI

10.1007/978-3-642-03889-1-40

ISBN

9783642038884