Should you trust your DSL results?

Author

Zhang, Zhi ; Jewett, Don L.

Author_Institution

Abratech Corp., Sausalito, CA, USA

fYear

1994

fDate

3-6 Nov 1994

Firstpage

183

Abstract

When fitting simultaneously-active dipoles, currently-used DSL (Dipole Source Localization) methods may contain MulGenErrs (Multiple-Generator Errors) due to model misspecification. The size of the MulGenErr is a function of both the model used, and the dipole parameters, including the dipoles´ waveforms (time-varying magnitudes). For a given fitting model, by examining the variation of the MulGenErrs (or the fit parameters) under different waveforms for the same generating-dipoles, the accuracy of the fitting model for this set of dipoles can be determined. This method of testing model misspecification can be applied to evoked potential maps where the parameters of the generating-dipoles are unknown. The dipole parameters fitted in a model should only be accepted if the model can be shown to be sufficiently accurate

Keywords

brain models; electroencephalography; dipole source localization methods; dipole waveforms; fit parameters; model misspecification; multiple-generator errors; simultaneously-active dipoles; Conductivity; DSL; Humans; Least squares methods; Magnetic heads; Predictive models; Scalp; Surface fitting; Testing;

fLanguage

English

Publisher

ieee

Conference_Titel

Engineering in Medicine and Biology Society, 1994. Engineering Advances: New Opportunities for Biomedical Engineers. Proceedings of the 16th Annual International Conference of the IEEE

Conference_Location

Baltimore, MD

Print_ISBN

0-7803-2050-6

Type

conf

DOI

10.1109/IEMBS.1994.411808

Filename

411808