TSPO and myeloid sarcoma: Binding potentials derived with reference modelling (BP = DVR − 1) reported previously for the prototypic TSPO ligand [11C](R)-PK11195 in healthy controls, and MS patients were in a similar range as results presented here for [18F]GE-180: the lowest BP was found in normal-appearing white matter and the highest BP in the thalamus and the brainstem [23–25].