Positron emission tomography (PET) is a powerful tool for the visualization of metabolism, especially the measurement of glucose uptake in vivo. Previous studies have assessed glucose uptake in several tissues such as the brain, visceral adipose tissue, and liver using PET imaging. However, due to the inadequate axial field of view of the existing PET scanners, simultaneous measurement of glucose uptake in major organs and parts across the entire human body has not yet been achieved.