Detecting Activation in fMRI Data: An Approach Based on Sparse Representation of BOLD Signal

Table 3

Results of experiments 1 and 2 indicating number of activated voxels (av), number of activated slices (as), and the matching percentages at voxel level (mpvl) and at slice level (mpsl) with respect to SPM software.

Stimulus	SPM		Reduced dictionary				Extended dictionary
	av	as	av	as	mpvl	mpsl	av	as	mpvl	mpsl
Instructions	708	22	676	26	57.99%	84.62%	717	22	63.18%	77.27%
Faces	91	11	95	17	54.96%	64.71%	120	17	47.50%	64.71%