Optshrink LR + S: accelerated fMRI reconstruction using non-convex optimal singular value shrinkage

Brain Informatics

Table 2 Statistical analysis results for uncorrected

	Method	6 lines			12 lines			24 lines
	Method	Cluster size	Z score	MNI position	Cluster size	Z score	MNI position	Cluster size	Z score	MNI position
1	LR + S [15] (without smoothing)	12	3.7	23 −31 62	14	3	−6 −13 29	36	4.06	45 −24 34
2	LR + S [15] (with smoothing)	93	2.41	58 14 15	50	3.74	54 −24 35	122	4.56	−57 −30 28
3	Proposed Optshrink LR + S (r = 1) (without smoothing)	35	4.94	39 −20 34	57	5.64	−9 −16 33	42	4.52	42 −23 34
4	Proposed Optshrink LR + S (r = 1) [with smoothing (FWHM = 6 mm)]	218	4.93	−54 −24 24	204	4.34	−54 −27 28	162	4.6	−54 −27 28

Task-based data—false belief task fMRI data, subject no. 1
Fully sampled fMRI data—cluster size = 26, Z score = 4.79, MNI position (in mm) = −57 −27 28
Smoothed fully sampled fMRI data with FWHM = 6 mm—cluster size = 112, Z score = 3.99, MNI position (in mm) = −57 −27 28
Please note that the coordinates of most active voxel are reported via Z score. Cluster size denotes the number of active voxels surrounding this most active voxel