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.


source reconstruction


finite element method


Fredrik Edelvik

Fraunhofer-Chalmers Centre

Björn O Andersson

Fraunhofer-Chalmers Centre

Stefan Jakobsson

Fraunhofer-Chalmers Centre

Stig Larsson

University of Gothenburg

Chalmers, Mathematical Sciences, Mathematics

Mikael Persson

Chalmers, Signals and Systems, Signal Processing and Biomedical Engineering

Yazdan Shirvany

Chalmers, Signals and Systems, Signal Processing and Biomedical Engineering

International Federation for Medical and Biological Engineering Proceedings

1680-0737 (ISSN)

Vol. 25 9 146-149
9783642038884 (ISBN)

Subject Categories

Medical Laboratory and Measurements Technologies

Computational Mathematics





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