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Journal articles
Fourth order approaches for localization of brain current sources.
Abstract : Two high resolution methods solving inverse problems potentially ill-posed, named 4-MUSIC and 4-RapMUSIC, are proposed. They allow for localization of brain current sources with unconstrained orientations from surface electro-or magneto-encephalographic data using spherical or realistic head geometries. The 4-MUSIC and 4-RapMUSIC methods are based on i) the separability of the data transfer matrix as a function of location and orientation parameters and ii) the fourth order (FO) virtual array theory. In addition, 4-RapMUSIC uses the deflation concept extended to FO statistics accounting for the presence of potentially but not totally coherent sources. Computer results display the superiority of the 4-RapMUSIC approach in different situations (two closed sources, additive Gaussian noise with unknown spatial covariance, ...) especially over classical algorithms.
Cited literature [12 references]
https://www.hal.inserm.fr/inserm-00183642
Contributor : Lotfi Senhadji <>
Submitted on : Wednesday, October 31, 2007 - 6:25:06 PM
Last modification on : Friday, January 15, 2021 - 3:33:49 AM
Long-term archiving on: : Monday, April 12, 2010 - 12:58:24 AM
Contributor : Lotfi Senhadji <>
Submitted on : Wednesday, October 31, 2007 - 6:25:06 PM
Last modification on : Friday, January 15, 2021 - 3:33:49 AM
Long-term archiving on: : Monday, April 12, 2010 - 12:58:24 AM