. Author manuscript; available in PMC: 2010 Mar 1.

Published in final edited form as: Magn Reson Med. 2009 Mar;61(3):548–559. doi: 10.1002/mrm.21875

Table 2.

Gray Matter to White Matter Ratio, by Brain Region, of Metabolite Values and Ratios of Metabolites for the 18–30-Year Age Group^*

Metabolite	Frontal GM/WM	Temporal GM/WM	Parietal GM/WM	Occipital GM/WM
NAA	1.00 ± 0.08	1.11 ± 0.10	0.98 ± 0.08	1.00 ± 0.11
Creatine	1.17 ± 0.08	1.34 ± 0.13	1.17 ± 0.09	1.20 ± 0.15
Choline	0.87 ± 0.09	0.90 ± 0.14	0.67 ± 0.08	0.83 ± 0.17
NAA/Cre	0.85 ± 0.05	0.79 ± 0.07	0.81 ± 0.05	0.79 ± 0.07
Cho/Cre	0.73 ± 0.07	0.64 ± 0.11	0.56 ± 0.07	0.67 ± 0.12
Cho/NAA	0.88 ± 0.08	0.82 ± 0.13	0.71 ± 0.08	0.89 ± 0.20

Values are given as mean ± SD of the ratio for all voxels in each brain region.