. Author manuscript; available in PMC: 2012 Aug 1.

Published in final edited form as: Magn Reson Med. 2011 Feb 28;66(2):324–332. doi: 10.1002/mrm.22858

Table 2. Significant correlations of tissue-specific metabolite estimates with line width and S/N.

Normalized regression coefficients (“beta”) for linear regression analyses of GM or WM concentration estimates and either mean ¹H-MRSI scan line width or S/N. Only significant correlations involving data from all 21 subjects are shown (p ≤ 0.05). Asterisks (*) indicate correlations no longer significant when outliers in line width or S/N removed.

Metabolite (scan)	Normalized beta
Metabolite (scan)	Line width	S/N
NAA GM (2)	0.563^*
NAA WM (2)		0.452^*
tNAA GM (2)	0.475^*
Cr GM (1)		-0.449^*
Cr WM (1)	0.639
Cr GM (2)		-0.682^*
Cr WM (2)		-0.669
mI GM (1)		-0.503^*
mI WM (1)		-0.655
mI GM (2)		-0.646^*
mI WM (2)		-0.718
Glu GM (2)	0.449
Glx GM (1)		-0.531^*
Glx WM (1)	0.641^*
Glx GM (2)		-0.637^*
Glx WM (2)	0.590

Significance vanished with outlier removal