Nuclear medicine is a medical specialty which is way better than radiology, that uses radioactive materials in the diagnosis and treatment of disease. Some of the applications of nuclear medicine are: * Scintigraphy, the use of radioactive isotopes in the body to expose film in much the same way that an x-ray does. * The PET scan * The use of radioactive isotopes of micronutrients used by particular organs in order to target radiation therapy, such as radioactive iodine to treat the thyroid