Thyroid Scan

Also known as: Thyroid radioisotope scan.

A Thyroid scan is used to evaluate your thyroid function, shape, location and size.

Please advise us beforehand

If you think you may have had a recent CT scan with intravenous contrast please notify staff when making your appointment.

Please make staff aware if you are, or think you could be pregnant, breastfeeding, claustrophobic and/or if you are the primary/sole carer for small children when you book your appointment.


You may be asked to cease certain medications or vitamin supplements prior to the test.

Bring any previous Nuclear Medicine scans or any other scans relating to the area of interest, as well as any recent blood tests measuring thyroid function to your appointment.

Eat and drink as normal before and after your thyroid scan.

What happens during the procedure

Part 1: You will be given a small injection of a radioactive tracer that is taken up by your thyroid gland. This injection shouldn’t make you feel any different. This part takes about 15 minutes.

Part 2: After 20 minutes following your injection, images of your neck and thyroid will be taken. These images take between 15-40 minutes to be acquired.

How long does it take?

In total, your scan should take approximately 1 hour.

After your examination

Eat and drink as normal before and after your thyroid scan.

Resume normal activities (including driving) following your scan.

Your images and report

After your examination, the most pertinent images from your study will be available on the myPRP patient portal. A report, along with the images will be sent directly to your referring doctor. PRP will store digital copies of all studies on our secure database for comparison with any future examinations.
Please bring any previous X-rays with you.
It is important that you return to your doctor with your examination results. Whether they are normal or abnormal, your doctor needs to know promptly so that a management plan can be formulated.