Thyroid Scan


What is the scan for?      

The thyroid scan shows the shape and size of the thyroid, how well it is functioning overall and also if lumps in the thyroid are working normally or not.

What preparation is required?     

You must be off thyroid medication for 4 days.  Ensure that you haven’t had a CT with contrast injection in the last 6 weeks.  You must also bring a thyroid ultrasound or blood test results to your appointment if any.

What about the injection?            

You are given a small injection into one of the veins in your arm.  After the injection, there is a delay of about 15 minutes until the scan.  There are no side effects, and you will not feel tired or dizzy and you can drive a car.

What about the pictures?

After the 15 minute break, pictures of the thyroid are taken.  This takes about 15 minutes.

Is it painful and are there any side effects?

No. There are no side effects or reaction from the injection. The injection does NOTcontain iodine and is therefore safe in people who are allergic to radiological contrast injections. Although you will be required to keep still during the scan, the procedure itself is completely painless.

Can I take my normal medication?

Yes. Take all of your normal medications.

Can I eat and drink on the day of my test?

Yes. There is no need to fast prior to this test. However, drinking plenty of fluid will help the bone tracer clear from your system quicker.

What if I am pregnant?

Please inform the Doctor or the Technologist if there is a chance you are pregnant or are breastfeeding.

When do I get the results? 

Results will be available the following day after 2pm.