I’m looking at some MEGA-PRESS data that has been analysed in Gannet (3.1 if I recall correctly).
I’m interested in GABA and Glx.
I understand that the alpha correction includes an alpha of .5, since this is the ratio of GABA+ in white matter to gray matter.
Gannet also gives an alpha corrected value for Glx - should I be using this? I can’t seem to find any literature that backs up the same assumption in Glx (or Glu or Gln) so my inclination is to avoid this correction for Glx, but wondered if I’m missing anything.