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. Author manuscript; available in PMC: 2010 Oct 1.
Published in final edited form as: Magn Reson Med. 2009 Oct;62(4):868–879. doi: 10.1002/mrm.22086

FIG. 6.

FIG. 6

Metabolite concentrations determined at 4T and 7T from spectra with number of transients ranging from 2 to 128. Number of subjects = 10, number of spectra per subject: 10 spectra with NT = 2, 10 × NT = 4, 10 × NT = 8, 10 × NT = 16, 5 × NT = 32, 2 × NT = 64, 1 × NT = 128. Error bars: average Cramér-Rao lower bounds. Metabolites such as GABA, scyllo-Ins, NAAG, and PC were not detected from spectra with lower number of transients at 4T (CRLB > 50%). Macromolecules (MM) are quantified in arbitrary units.