In this third episode on PET/MRI, we’ll focus on the overall goals for using MRI instead of CT with PET, namely less radiation and more accuracy. These properties have particular benefits in pediatrics and neurology that I’ll discuss. We’ll review the active area of protocol development with PET/MRI, including the issues in attenuation correction. Finally, we’ll look at emerging tracers that could add to some of the excitement over PET/MRI.