Source localization in the context of functional brain imaging :
FAµST was used in an experience of source localization for brain image application.
Different FAµST approximation of a Magnetoencephalography (MEG) gain matrix “Mi” was computed using hierarchical_fact.
A SparseCoding algorithm was used to solve this source localization problem using the MEG gain matrix or its FAµST approximation.
The two following pictures illustrate the different trade-offs between speed-up and error of localization using dense or FAµST matrix.
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