What determines the dose of radioactive iodine that one receives for remnant ablation and treatment for papillary thyroid cancer? i received 100millic

It is arbitrary: To some extent. It sounds like the right amount for you. You will do well.

Probability to recur: The dose of rai is typically based on the predicted probability of thyroid cancer recurrence. People with stage 1 or 2 disease are typically given lower dosages (30-100 mci). Stage 3 or 4 would receive higher (100-150). Recent studies are looking more at 30 mci to ablate most lower risk patients.