Table 1.

Mean metabolite concentrations and the results of tissue segmentation of the whole brain with associated intra-subject COVs for different linewidth thresholds, obtained with voxel-based analysis, averaged from 5 repeated scans (Top) and averaged among 20 volunteers (Bottom).

Metabolite or tissue type1,2	COV (%)			Concentration (i.u.)
	LW threshold (Hz)			LW threshold (Hz)
	8	11	13	8	11	13
NAA	12.79	13.73	15.99	9.82	9.84	9.59
tCho	19.30	19.86	22.32	1.71	1.74	1.89
tCr	14.45	15.10	16.72	7.75	7.84	7.96
Glx	30.58	31.13	30.57	8.20	8.25	8.30
ml	30.63	31.02	40.76	4.69	4.75	4.89
Tissue water	2.05	2.22	2.44
LW	12.23	13.23	14.42	5.95	6.27	7.19
WM	5.50	5.56	5.50	0.48	0.47	0.45
GM	5.46	5.36	5.24	0.39	0.40	0.40
CSF	9.18	9.00	8.82	0.13	0.13	0.15

Metabolite or tissue type3	COV (%)			Concentration (i.u.)
	LW threshold (Hz)			LW threshold (Hz)
	8	11	13	8	11	13
NAA	18.48	19.36	23.37	9.95	10.02	9.73
tCho	24.87	24.81	34.04	1.71	1.78	1.91
tCr	20.23	20.79	25.71	7.99	8.13	8.21
Glx	35.25	35.33	40.04	7.82	7.87	7.89
ml	37.07	37.75	55.39	4.62	4.70	4.94
Tissue water	6.74	6.53	7.76
LW	17.95	19.89	24.17	6.25	6.65	7.43
WM	20.44	20.71	21.05	0.46	0.47	0.44
GM	20.03	19.50	19.40	0.39	0.40	0.40
CSF	35.43	37.31	35.11	0.14	0.13	0.14

¹CSF = cerebrospinal fluid, GM = gray matter, WM = white matter, LW = linewidth.

²Averaged from 5 repeated scans.

³Averaged among 20 volunteers.