Table 2. Talairach, MNI, and Converted MNI Coordinates for Recall > Baseline.

Two sets of coordinates were obtained for a sample contrast (Recall > Baseline), based on normalization to (a) Talairach space (9 clusters) or (b) MNI space (10 clusters). Small differences in cluster centers of mass and extents were observed between the images. Coordinates were closely examined to find matching pairs (as seen on the same line). 7 matching coordinates were observed. The Euclidean distances, d, between the MNI and Talairach pairs of coordinates were computed and averaged to obtain a mean value of 6.743 mm. MNI coordinates obtained for the Recall > Baseline contrast were converted to Talairach coordinates using (c) the Brett transform (mni2tal) and (d) the Lancaster transform (icbm2tal). Euclidean distances were also computed and averaged from the converted coordinates to the Talairach coordinates.

	(a) Talairach Coordinates												(b) MNI Coordinates
	x			y		z			Z				x	y	z		Z		d
	-4			-90		-6			9.42				-4	-92	-8		9.08		2.828
	-14			-16		6			7.56				-12	-14	6		8.09		2.828
	-4			14		40			7.06				2	20	44		8.17		9.381
	42			6		24			6.68				44	10	24		6.46		4.472
	30			18		0			6.49				38	20	-8		6.66		11.489
	-40			50		2			4.71				-42	56	-2		4.87		7.483
	40			-32		42			4.30				46	-34	48		4.43		8.718
Average Distance Between Talairach and MNI Clusters = 6.743 mm
Tal Only	10		-4		0			4.66				MNI Only
	6		-88		32			4.60
													26	-94		-4		7.29
													-42	28		14		6.44
													48	40		22		5.52
	(c) Converted Using Brett Transform											(d) Converted Using Lancaster Transform
	X	Y					Z				d		X	Y	Z				d
	-3.96	-89.52					-2.85				3.187		-5.15	-87.73	-9.72				4.507
	-11.88	-13.27					6.16				3.460		-12.49	-14.54	7.67				2.683
	1.98	21.51					39.51				9.613		0.78	15.37	44.08				6.432
	43.56	10.85					21.59				5.636		40.55	6.70	25.66				2.313
	37.62	18.99					-7.55				10.773		34.98	18.08	-2.58				5.609
	-41.58	54.16					-4.03				7.494		-40.62	52.52	4.62				3.688
	45.54	-30.61					45.67				6.789		42.23	-36.42	44.58				5.583
Average Distance = 6.707 mm												Average Distance = 4.402 mm