Correlations between glutamate chemical exchange saturation transfer (GluCEST) and magnetic resonance spectroscopy (MRS). Positive correlations between GluCEST% value and [Glu] in the occipital gray matter (A), left parietooccipital white matter (B), right parietooccipital white matter (C) and splenium of the corpus callosum (D). OGM, occipital gray matter; LPWM, left parietooccipital white matter; RPWM, right parietooccipital white matter; SCC, splenium of the corpus callosum; [Glu], absolute glutamate concentration.