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Single meg/eeg source reconstruction with multiple sparse priors and variable patches

LOPEZ HINCAPIE, JOSE DAVID and BARNES, GARETH ROBERT and ESPINOSA, JAIRO JOSE (2012) Single meg/eeg source reconstruction with multiple sparse priors and variable patches. Dyna; Vol. 79, núm. 174 (2012); 136-144 DYNA; Vol. 79, núm. 174 (2012); 136-144 2346-2183 0012-7353 .

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URL oficial: http://revistas.unal.edu.co/index.php/dyna/article...

Resumen

MEG/EEG brain imaging has become an important tool in neuroimaging. The reconstruction of cortical current flow is an ill-posed problem, but its uncertainty can be reduced by including prior information within a Bayesian framework. Typically this involves using knowledge of the cortical manifold to construct a set of possible regions of neural source activity. In this work a second stage is proposed to reduce localisation error without severely increasing the computational load. This stage consists of iteratively updating the set of possible regions based on previous reconstructions, in order to focus on those brain regions with a higher probability of being active. The proposed methodology was tested with synthetic MEG datasets giving as result zero localisation error for single sources and different noise levels. Real data from a visual attention study was used for validation.

Tipo de documento:Artículo - Article
Información adicional:Derechos de autor reservados
Palabras clave:MEG/EEG inverse problem, Multiple Sparse Priors, Brain imaging
Unidad administrativa:Revistas electrónicas UN > Dyna
Código ID:29499
Enviado por : Dirección Nacional de Bibliotecas STECNICO
Enviado el día :30 Junio 2014 04:14
Ultima modificación:18 Agosto 2014 18:41
Ultima modificación:18 Agosto 2014 18:41
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