Comparison of different source localization methods

D. C. Fernandez, R. De Peralta Menendez, S. L.G. Andino, E. O. Farras

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The localization of the neural generators of the brain's electromagnetic activity based an electrical or magnetic recordings requires the solution of an ill-posed inverse problem. In its general form, this inverse problem has no unique solution. The only way to deal with this problem, is to restrict the set of possible solutions by using either anatomical or mathematical constraints or a combination of both. On the basis of these restrictions, different reconstructions of the sources of EEG and MEG are possible, each providing a different representation of the electrical processes in the brain. Opposed to the more classical dipole localization methods, inverse procedures that produce distributed estimates of neuronal currents have received increasing attention in the last few years. In this paper, we compare different source localization methods using data from a pathological subject. Among these methods are: (1) spatio-temporal source models (BESA); (2) generalized minimum norm solutions (MNS) and (3) electromagnetic temporal tomography (EMTT). In order to assess their specific performance, each method is compared with the information contained in the CT.

Original languageEnglish (US)
Title of host publicationProceedings - SIBGRAPI 1998
Subtitle of host publicationInternational Symposium on Computer Graphics, Image Processing, and Vision
EditorsGilberto Camara, Luciano da Fontoura Costa
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages326-331
Number of pages6
ISBN (Print)0818692154, 9780818692154
DOIs
StatePublished - 1998
Externally publishedYes
Event1998 International Symposium on Computer Graphics, Image Processing, and Vision. SIBGRAPI 1998 - Rio de Janeiro, Brazil
Duration: Oct 20 1998Oct 23 1998

Publication series

NameProceedings - SIBGRAPI 1998: International Symposium on Computer Graphics, Image Processing, and Vision

Conference

Conference1998 International Symposium on Computer Graphics, Image Processing, and Vision. SIBGRAPI 1998
Country/TerritoryBrazil
CityRio de Janeiro
Period10/20/9810/23/98

Keywords

  • dipole localization
  • distributed solution
  • inverse problem
  • source localization procedures

ASJC Scopus subject areas

  • Computer Graphics and Computer-Aided Design
  • Computer Vision and Pattern Recognition
  • Human-Computer Interaction

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