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. Author manuscript; available in PMC: 2019 Jan 1.
Published in final edited form as: Magn Reson Med. 2017 Mar 31;79(1):41–47. doi: 10.1002/mrm.26691

Figure 5.

Figure 5

Intra-subject repeatability. (a) GABA-edited improved MEGA-SPECIAL spectra from a 27 cc voxel in the occipital lobe of a normal volunteer scanned five times (with subject removal from scanner followed by repositioning repeated after each scan). Acquisition parameters: 256 transients, 8.5 min acquisition. (b) Summary data comparing MEGA-PRESS GABA+/Cre = 0.11 ± 0.007 (mean ± sd) versus improved MEGA-SPECIAL GABA/Cre = 0.07 ± 0.004. The coefficient-of-variation was 6.0% for both the GABA+/Cre and GABA/Cre estimates.