Why is a Thyroid Scan performed?

 A thyroid scan is used to assess the function of Thyroid gland. There are many types of Thyroid disease and it is important the specify the type of disease to ensure correct treatment is delivered.
The referring Doctor may also ask you to have blood tests and an ultrasound scan to confirm the diagnosis. 

What preparation is involved?

Stop Thyroid medications:

  • Neomecazol 3 days prior to scan 
  • Thyroxine 3 weeks prior to scan 
You must not have had a CT scan using contrast in the last 6 weeks
Cease kelp and Iodine containing products (including alternative medications)

You may eat and drink on the day of the test.

If there is any possibility that you may be pregnant or if you are breastfeeding please call us to be advised of the precautions you are required to follow.

How long does the test take?

1 hr

What is involved?

A small injection of a radioactive tracer is administered into a vein in the arm. This goes to the Thyroid and then images are taken.

Are there any side effects from this test?


How much radiation is involved?

The radiation dose is less than a Chest X-ray.
You will be radioactive for 12 hours after the procedure. It is advised that you limit time spent in close proximity to pregnant women and children.

When will the results be ready?

Your Doctor will receive the results within 24 business hours after the completion of the scan.

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