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. Author manuscript; available in PMC: 2015 Feb 1.
Published in final edited form as: Neuroimage. 2012 Dec 13;86:43–52. doi: 10.1016/j.neuroimage.2012.12.004

Fig. 2.

Fig. 2

Comparison of GABA-edited spectra across three vendors. The Siemens data is acquired with a vendor-distributed sequence, whereas the GE and Philips sequences are customer implementations by and available from RAEE. (a) Phantom data (acquired in a 10 mM GABA solution in phosphate-buffered saline) show similar edited signal in each case. Note that the commonly anticipated ‘pseudo-doublet’ is not observed in any implementation, and that implementations differ significantly in the extent to which the ‘center peak’ is edited. (b) In-vivo edited spectra. Typical parameters are: TE 68 ms; TR 2 s; 3×3×3 cm3 voxel; acquisition time 10 min; editing pulses applied at 1.9 ppm (ON) and 7.46 ppm (OFF).