Bayesian BOLD and perfusion source separation and deconvolution from functional ASL imaging

Thomas Vincent 1 Florence Forbes 1 Philippe Ciuciu 2
1 MISTIS - Modelling and Inference of Complex and Structured Stochastic Systems
Inria Grenoble - Rhône-Alpes, LJK - Laboratoire Jean Kuntzmann, INPG - Institut National Polytechnique de Grenoble
2 PARIETAL - Modelling brain structure, function and variability based on high-field MRI data
NEUROSPIN - Service NEUROSPIN, Inria Saclay - Ile de France
Abstract : In many neuroscience applications, the Arterial Spin Labeling (ASL) fMRI modality arises as a preferable choice to the standard BOLD modality due to its ability to provide a quantitative measure of the Cerebral Blood Flow (CBF). Such a quantification is central but generally performed without consideration of a specific modeling of the perfusion component in the signal often handled via standard GLM approaches using the BOLD canonical response function as regressor. In this work, we propose a novel Bayesian hierarchical model of the ASL signal which allows activation detection and both the extraction of a perfusion and a hemodynamic component. Validation on synthetic and real data sets from event-related ASL show the ability of our model to address the source separation and double deconvolution problems inherent to ASL data analysis.
keyword : ASL BOLD fMRI
Type de document :
Communication dans un congrès
ICASSP 2013 - IEEE International Conference on Acoustics, Speech, and Signal Processing, May 2013, Vancouver, Canada. IEEE, pp.1003-1007, 2013, 〈10.1109/ICASSP.2013.6637800〉
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Contributeur : Philippe Ciuciu <>
Soumis le : samedi 7 septembre 2013 - 17:00:00
Dernière modification le : vendredi 22 juin 2018 - 01:20:41
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Thomas Vincent, Florence Forbes, Philippe Ciuciu. Bayesian BOLD and perfusion source separation and deconvolution from functional ASL imaging. ICASSP 2013 - IEEE International Conference on Acoustics, Speech, and Signal Processing, May 2013, Vancouver, Canada. IEEE, pp.1003-1007, 2013, 〈10.1109/ICASSP.2013.6637800〉. 〈hal-00859373〉

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