A few emit auger electrons and alpha particles, and several also emit gamma rays and X-rays during their decay. The most successful metabolic radionuclide for thyroid therapy uses iodine-131 as the ...

which represents an external radiation hazard. » What if there are pregnant persons near, or living with, the patient? If the patient has been treated with a gamma-emitting radionuclide, it may be ...

Additionally, gamma rays are used in medicine, including in radiotherapy ... Small amounts of gamma-ray exposure can arise from nuclear weapons and even from lightning strikes.