Programs that offer the specialty in which all modalities of radiant energy are used for the detection of abnormalities throughout the body, often following the ingestion or injection of a radioactive or radiopaque substance that functions as a contrast medium. This includes but is not limited to imaging techniques and methodologies utilizing radiation emitted by x-ray tubes, radionuclides, thermagraphic devices, ultrasonic devices and radio-frequency electromagnetic radiation emitted by atoms.