An Alternative Subspace Approach to EEG 3-D Dipole Source Localization

Bobby Xu, Xiao Liang Xu, Bin He

Research output: Contribution to journalConference articlepeer-review

Abstract

In the present study, we investigate a new approach to EEC 3-D dipole source localization by adapting a non-recursive subspace algorithm called FINES. In estimating dipole locations, the present approach employs projections onto a particular vector set in the estimated noise-only subspace instead of the entire estimated noise-only subspace that MUSIC is based on. The subspace spanned by this vector set is, in the sense of principal angle, closest to the subspace spanned by the array manifold associated with a particular location region. By incorporating knowledge of the array manifold in identifying different vector sets in the estimated noise-only subspace for different location regions, this approach is able to enhance dipole source resolvability and reduce estimation errors. The present computer simulations show in EEG 3-D dipole source localization that FINES has 1) better resolvability of two closely-spaced sources, and 2) better estimation accuracy of source locations, compared to classic MUSIC.

Original languageEnglish (US)
Pages (from-to)2132-2135
Number of pages4
JournalAnnual International Conference of the IEEE Engineering in Medicine and Biology - Proceedings
Volume3
StatePublished - 2003
EventA New Beginning for Human Health: Proceedings of the 25th Annual International Conference of the IEEE Engineering in Medicine and Biology Society - Cancun, Mexico
Duration: Sep 17 2003Sep 21 2003

Keywords

  • EEC
  • FINES
  • MUSIC
  • Source localization

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