EEG Source Reconstruction Performance as a Function of Skull Conductance Contrast

Sofie Therese Hansen, Lars Kai Hansen

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Abstract

Through simulated EEG we investigate the effect of the for-ward model’s applied skull:scalp conductivity ratio on the source reconstruction performance. We show that having a higher conductivity ratio generally leads to improvement of the solution. Additionally we see a clear connection between higher conductivity ratios and lower coherence, thus a reduction of the ill-posedness of the EEG inverse problem. Finally we show on real EEG data the stability of the strongest source recovered across conductivity ratios.
Original languageEnglish
Title of host publicationProceedings of the 40th IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP 2015)
PublisherIEEE
Publication date2015
Pages827-831
ISBN (Print)978-1-4673-6997-8
DOIs
Publication statusPublished - 2015
Event40th IEEE International Conference on Acoustics, Speech and Signal Processing - Brisbane, Australia
Duration: 19 Apr 201524 Apr 2015

Conference

Conference40th IEEE International Conference on Acoustics, Speech and Signal Processing
CountryAustralia
CityBrisbane
Period19/04/201524/04/2015

Keywords

  • EEG source reconstruction
  • Inverse problem
  • Forward models
  • Sparsity
  • Variational approximation

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