I was given a Thyroid scan before my treatment dose of RAI to see how much tissue was left after my thyroidectomy and to see where they wanted my treatment dose to go. This was done the day after my diagnostic dose was given and the day before my treatment dose was administered.
They like to take a few pictures including the thyroid scan, WBS, etc. to get a good idea of the target of the treatment. Mine was done in the Nuclear Medicine department by a tech and was evaluated by the Nuclear Medicine doc and then forwarded to my endocrinologist.
Usually a radiologist preforms the scan. Any doctor can order it.
You are speaking about a uptake thyroid scan right?