Table 3.

Statistical comparison of gray matter volume estimates. Voxel-based comparison between gray matter volume maps estimated with new and conventional tissue probability maps (TPM) using T1-weighted MDEFT images. Coordinates are given in Montreal Neurological Institute (MNI) standard space. SN = substantia nigra; GP = globus pallidum.

	Structure	Left hemisphere coordinates (mm)			t-value	Cluster size (number of voxels)	Right hemisphere coordinates (mm)			t-value	Cluster size (number of voxels)
x	y	z			x	y	z
New TPM > Old TPM	GP	− 15	9	3	47.39	6195	16	− 4	− 1	30	6483
Caudate	− 12	13	6	47.39	12	13	6	44
Putamen	− 27	0	12	45.53	28	0	12	44.39
Thalamus	− 14	− 15	3	74.71	2411	18	− 15	6	74.22	2443
SN	− 4.5	− 12	− 10.5	19.54	120	6	− 12	− 9	18.01	134
Dentate	− 14	− 51	− 35	18.01	1357	17	− 63	− 32	19.68	1294