Figure 1

Schematic diagram illustrating the 18F-FDG-PET imaging protocol. Dynamic 18F-FDG-PET scans were performed using hyperinsulinemic-euglycemic clamping which consisted of high-dose (240 mU/kg/min) and subsequent low-dose (12 mU/kg/min) insulin plus glucose infusion (at variable rates) to obtain hyperinsulinemic-euglycemic conditions. iv = intravenous injection.