Fig. 2From: [18F]FE@SNAP—a specific PET tracer for melanin-concentrating hormone receptor 1 imaging?Scheme of the ROIs for calculation of ratios. 1 (yellow): ventricular system; 2 (green): hypothalamic area; 3 (pink): non-target region; and 4 (orange): whole brain. It is noteworthy that ROIs 1 and 2 include the target areas as well as some background areas, due to varying target size throughout the different brain levels (bregma)Back to article page