PET药品定义如下：
PET drugs are diagnostic radiopharmaceuticals that, following injection into humans, produce signals for medical images through the emission of a positron. The dual photons that emerge from the positron annihilation are detected by PET scanning devices to form images that map the location of the radiopharmaceutical within the body. Most PET drugs are produced using radionuclides generated from cyclotrons at locations in close proximity to the facility that performs the PET scanning.
