“How long does radioactive iodine stay in your body?”
I am getting radioactive iodine treatment. How long does radioactive iodine stay in your body?
1 Answer
It depends on the half life of the isotope used. Half life is the time it takes for an isotope to decay to half of its original activity level. It can be short, like 13 seconds for Krypton gas or long like radioactive Iodine-131 with an 8 day half life. Those with longer half lives can be used as therapeutic agents in some circumstances.
