Table 5.

Deep gray matter data: field strength comparisons: percent differences

	DGM structure	MS 1.5T vs. 3T	NC 1.5T vs. 3T
Volumes	Thalamus	2.7%	5.7%
	Caudate	4.8%	5.0%
	Putamen	4.1%	5.3%
	Globus pallidus	7.9%	10.4%
	Total DGM	3.9%	5.9%
Fractions	Thalamus	2.4%	5.2%
	Caudate	4.5%	4.5%
	Putamen	3.7%	4.8%
	Globus pallidus	7.5%	9.8%
	Total DGM	3.6%	5.4%
Normalized	Thalamus	3.2%	4.6%
	Caudate	5.3%	3.9%
	Putamen	4.6%	4.2%
	Globus pallidus	8.4%	9.2%
	Total DGM	4.4%	4.8%

Key: For each subject, the percent difference for 3T data minus 1.5T data was calculated, using the 1.5T data as the denominator. The averages of those percentages are shown for each group. DGM = cerebral subcortical deep gray matter; MS multiple sclerosis, NC normal controls; normalized = raw volume x SIENAX normalization factor