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(a) Superposition of in vivo 1H-MR spectra acquired from the grey-matter-rich occipital cortex of 10 healthy subjects at 4 T and 7 T (STEAM, VOI = 8 ml, NT = 160, TE = 4 ms at 4 T and TE = 6 ms at 7 T). (b) Comparison of neurochemical profiles determined from these 4T and 7T spectra. Error bars indicate SD. Only concentrations of Asp, GABA, NAAG and PE were statistically different between 4 T and 7 T. Modified with permission from Tkac et al.26 © 2009 John Wiley and Sons.
