Re:Radiation levels (Score 1)

100 - 150 milliCuries for thyroid ablation ( which detroys remnants of thyroid tissue after the gland has been surgically removed) 7 - 10 milliCuries for Graves disease .. but the Graves disease patient might very well be more radioactive , because most of the ablative dose is excreted very quickly. A little more info I131 has beta AND gamma emisions gamma at something over 350 KeV , as i recall.