Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
Evaluation of inverse methods and head models for EEG source localization using a human skull phantom
Autore:
Baillet, S; Riera, JJ; Marin, G; Mangin, JF; Aubert, J; Garnero, L;
Indirizzi:
Hop La Pitie Salpetriere, CNRS, UPR640, LENA,Cognit Neurosci & Brain Imaging Lab, F-75651 Paris 13, France Hop La Pitie Salpetriere Paris France 13g Lab, F-75651 Paris 13, France Cuban Neurosci Ctr, Biophys Grp, La Havana, Cuba Cuban Neurosci Ctr La Havana Cuba sci Ctr, Biophys Grp, La Havana, Cuba CEA, Serv Hosp Frederic Joliot, F-91406 Orsay, France CEA Orsay France F-91406 erv Hosp Frederic Joliot, F-91406 Orsay, France
Titolo Testata:
PHYSICS IN MEDICINE AND BIOLOGY
fascicolo: 1, volume: 46, anno: 2001,
pagine: 77 - 96
SICI:
0031-9155(200101)46:1<77:EOIMAH>2.0.ZU;2-P
Fonte:
ISI
Lingua:
ENG
Soggetto:
BOUNDARY-ELEMENT METHOD; HUMAN BRAIN; IMAGE-RECONSTRUCTION; VOLUME CONDUCTOR; SPHERICAL MODEL; MEG; ACCURACY; ELECTROENCEPHALOGRAPHY; MAGNETOENCEPHALOGRAPHY; POTENTIALS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
61
Recensione:
Indirizzi per estratti:
Indirizzo: Baillet, S Hop La Pitie Salpetriere, CNRS, UPR640, LENA,Cognit Neurosci & Brain Imaging Lab, 47 Bvd Hop, F-75651 Paris 13, France Hop La Pitie Salpetriere 47 Bvd Hop Paris France 13 13, France
Citazione:
S. Baillet et al., "Evaluation of inverse methods and head models for EEG source localization using a human skull phantom", PHYS MED BI, 46(1), 2001, pp. 77-96

Abstract

We used a real-skull phantom head to investigate the performances of representative methods for EEG source localization when considering various headmodels. We describe several experiments using a montage with current sources located at multiple positions and orientations inside a human skull filled with a conductive medium. The robustness of selected methods based on distributed source models is evaluated as various solutions to the forward problem (from the sphere to the finite element method) are considered. Experimental results indicate that inverse methods using appropriate cortex-based source models are almost always able to locate the active source with excellent precision, with little or no spurious activity in close or distant regions, even when two sources are simultaneously active. Superior regularization schemes for solving the inverse problem can dramatically help the estimation of sparse and focal active zones, despite significant approximation of the head geometry and the conductivity properties ofthe head tissues. Realistic head models are necessary, though, to fit the data with a reasonable level of residual variance.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 18/01/20 alle ore 07:29:33