Comparison and improvements of LCMV and MUSIC source localization techniques for use in real clinical environments

Journal of Neuroscience Methods
A de HoyosAntonio Hernando

Abstract

The present work shows some improvements realized on practical aspects of the implementation of Singular Value Decomposition (SVD) methods to localize the sources of neural activity by means of magnetoencephalograph (MEG). Two methods have been improved and compared i.e. a spatial filter, the Linearly Constrained Minimum Variance Beamformer (LCMV) method, and a signal subspace method that is an implementation of the MUSIC (Multiple Signal Classification) method due to Mosher et al. (1992). It also shows the performance of both methods comparing three different averaging procedures. The influence of the correct selection of the noise subspace dimension has been analyzed. Using acoustic stimulus for real patient measurements, we discuss the relevant differences of both methods and propose an adequate strategy for future diagnosis based on correct source localization.

References

Jul 1, 1990·IEEE Transactions on Bio-medical Engineering·Y SaluM Hallett
Sep 1, 1997·IEEE Transactions on Bio-medical Engineering·B D Van VeenA Suzuki
Nov 7, 1998·IEEE Transactions on Bio-medical Engineering·J C Mosher, R M Leahy
Jan 16, 2004·IEEE Transactions on Bio-medical Engineering·Kensuke SekiharaAlec Marantz
Apr 11, 2006·IEEE Transactions on Bio-medical Engineering·Hesheng Liu, Paul H Schimpf
Dec 25, 2007·NeuroImage·Matthew J BrookesPeter G Morris
Jan 22, 2011·Computational Intelligence and Neuroscience·Robert OostenveldJan-Mathijs Schoffelen

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Citations

Oct 26, 2013·Journal of Neuroscience Methods·Alfonso de HoyosAntonio Hernando

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