Figure 1From: Quantitative assessment of brown adipose tissue metabolic activity and volume using 18F-FDG PET/CT and β3-adrenergic receptor activation Chemical structures of compounds used to activate BAT and measured by 18 F-FDG. Nicotine (1), caffeine (2), ephedrine (3), and norepinephrine (4) (a) and CL 316,243 (b).Back to article page