I got a geiger counter, hand held, and measured myself...I was very "hot" for 2 weeks. My doc told me after 2-3 days 80% of the radioactive material passes thru your body but I think that estimate is off. I think from the measurements I took on the geiger counter it took more like 4-5 days for that much to leave my body. Oh by the way I had 100 micro-curies of radioactive iodine (it can be as high as 300). After two weeks, I was still radioactive but really only where it was sticking in me- my neck, bladder...(it is in your bladder because it leaves your body thru your pee)
Check w/ nuclear med (they give you the RAI 131) but I was told not to get pregnant for at least a year. Radioactive iodine has a half life of 8 days and every 8 days after that it decreases by half, so in 8 days you are 50 % less radioactive and in 8 more days you are 50 % less radioactive or at 25 %. After 8 more days you are at about 12.5 % and so forth. It sticks to any thyroid cells in the body...even if it was taken out. They will tell you to stay away from people for a certain amount of time...pets too. You have to wash all your bedding separately. You don't leave it behind though- the contamination unless you leave bodily fluids...so spit, pee, tears, blood...sweat...but just touching someone or sitting somewhere doesn't contaminate.
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