Fig. 1: Study flow-chart showing the usable PET and MRS data at baseline and six weeks follow-up visit as well as data that was discarded or not acquired.

[18F]-DOPA PET 3,4-dihydroxy-6-[18F]fluoro-L-phenylalanine, PRESS point-resolved spectroscopy, MEGAPRESS, Mescher-Garwood point-resolved spectroscopy, ACC Anterior cingulate cortex, FEP first-episode patients with psychosis, HC healthy controls.