what is radioactive iodine
what radioactive iodine is radioactive iodine treatment is a type of internal radiotherapy the treatment uses a radioactive form of iodine called iodine 131 i 131 the radioactive iodine circulates throughout your body in your bloodstream thyroid cancer cells pick up the iodine wherever they are in your bodythe radiation in the iodine then kills the cancer cellst uses a radioactive form of iodine called iodine 131 i 131 the radioactive iodine circulates throughout your body in your bloodstream thyroid cancer cells pick up the iodine wherever they are in your body the radiation in the iodine then kills the cancer cells