 |
 |
|
|
| HAL: inserm-00255994, version 1 |
| PubMed: 18269984 |
| PubMed Central: 2267684 |
| DOI: 10.1109/TBME.2007.905408 |
| Detailed view |  Export this paper |
 |
| IEEE Transactions on Biomedical Engineering 55, 2 (2008) 490-501 |
|
|
|
|
| Brain Source Localization Using a Fourth-Order Deflation Scheme. |
|
|
Laurent Albera 1Anne Ferréol 2 |
|
|
| (2008) |
|
|
|
| In this paper, a high-resolution method for solving potentially ill-posed inverse problems is proposed. This method named FO-D-MUSIC allows for localization of brain current sources with unconstrained orientations from surface electroencephalographic (EEG) or magnetoencephalographic (MEG) data using spherical or realistic head geometries. The FO-D-MUSIC method is based on the following: 1) the separability of the data transfer matrix as a function of location and orientation parameters, 2) the fourth-order (FO) virtual array theory, and 3) the deflation concept extended to FO statistics accounting for the presence of potentially but not completely statistically dependent sources. Computer results display the superiority of the FO-D-MUSIC approach in different situations (very closed sources, small number of electrodes, additive Gaussian noise with unknown spatial covariance, etc.) compared to classical algorithms. |
|
|
|
|
|
|
|
|
|
|
|
| 1: | Laboratoire Traitement du Signal et de l'Image (LTSI) |
|
|
|
INSERM : U642 – Université de Rennes 1 |
|
|
| 2: | Thales Research and Technology [Palaiseau] (TRT) |
|
|
|
THALES |
|
|
|
|
|
|
|
|
|
| subject | : | Life Sciences/Bioengineering Engineering Sciences/Signal and Image processing Cognitive science/Neuroscience Mathematics/Statistics Statistics/Statistics Theory Computer Science/Signal and Image Processing |
|
|
| Backward problem – EEG – Fourth Order Statistics – MEG – MUSIC – Sequential Source Localization – electroencephalography – fourth-order (FO) statistics – magnetoencephalography – multiple signal classification – sequential source localization |
|
|
|
| Attached file list to this document: | ||||||||||
|
||||||||||
|
|
|
| inserm-00255994, version 1 | |
| http://www.hal.inserm.fr/inserm-00255994 | |
| oai:www.hal.inserm.fr:inserm-00255994 | |
| From: Lotfi Senhadji | |
| Submitted on: Friday, 15 February 2008 14:23:04 | |
| Updated on: Monday, 18 February 2008 14:51:26 | |
