After thyroid surgery, use 80mCi if patient has been pre-treated with thyroxine withdrawl, or 100mCi if they have been pre-treated with Thyrogen.
After the ablation dose, they will have a follow-up scan. If this shows remnant disease that you don't think is malignant, give 70mCi. However, if it shows remnant disease that you think is malignant, or there are metastases seen, then give 150mCi.
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