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Symmetrical EEG-FMRI Imaging by Sparse Regularization

Oberlin, Thomas and Barillot, Christian and Gribonval, Rémi and Maurel, Pierre Symmetrical EEG-FMRI Imaging by Sparse Regularization. (2015) In: European Signal and Image Processing Conference - EUSIPCO 2015, 31 August 2015 - 4 September 2015 (Nice, France). (Unpublished)

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Abstract

This work considers the problem of brain imaging using simultaneously recorded electroencephalography (EEG) and functional magnetic resonance imaging (fMRI). To this end, we introduce a linear coupling model that links the electrical EEG signal to the hemodynamic response from the blood-oxygen level dependent (BOLD) signal. Both modalities are then symmetrically integrated, to achieve a high resolution in time and space while allowing some robustness against potential decoupling of the BOLD effect. The novelty of the approach consists in expressing the joint imaging problem as a linear inverse problem, which is addressed using sparse regularization. We consider several sparsity-enforcing penalties, which naturally reflect the fact that only few areas of the brain are activated at a certain time, and allow for a fast optimization through proximal algorithms. The significance of the method and the effectiveness of the algorithms are demonstrated through numerical investigations on a spherical head model.

Item Type:Conference or Workshop Item (Paper)
HAL Id:hal-01170889
Audience (conference):International conference proceedings
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - INPT (FRANCE)
French research institutions > Institut National de la Recherche en Informatique et en Automatique - INRIA (FRANCE)
Other partners > Institut National des Sciences Appliquées de Rennes - INSA (FRANCE)
Other partners > Institut Mines-Télécom (FRANCE)
Other partners > Ecole Supérieure d'Electricité - SUPELEC (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UPS (FRANCE)
Université de Toulouse > Université Toulouse - Jean Jaurès - UT2J (FRANCE)
Université de Toulouse > Université Toulouse 1 Capitole - UT1 (FRANCE)
Other partners > Ecole Normale Supérieure de Rennes - ENS Rennes (FRANCE)
Other partners > Université de Bretagne Sud - UBS (FRANCE)
Other partners > Université de Rennes 1 (FRANCE)
Laboratory name:
Funders:
CominLabs excellence laboratory
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Deposited By: Thomas OBERLIN
Deposited On:02 Jul 2015 12:30

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