Thyroid Uptake and Scan
This procedure shows the size and shape of the thyroid and how well the thyroid gland is functioning.
- Nothing to eat or drink for 3 hours prior to the study.
- Please arrive 15 minutes prior to your appointment with an order/prescription if your doctor has given one to you.
- Bring a list of your current medications.
- Certain medications and procedures will cause this test to give false results. Please contact the hospital/clinic where your test is scheduled for specific instructions.
- Stop taking thyroid medication (e.g. Synthroid or Levothyroxine) for 4 weeks prior to the exam.
- Stop taking multivitamins containing Iodine (e.g. One a Day, Centrum) for 6 weeks prior to the exam. Please check the list of ingredients to confirm whether your specific multivitamins contain Iodine.
- The procedure is done over a two day period.
- This test will help determine both the anatomy and physiology of the thyroid gland.
- The technologist will first obtain some of your medical history and review your medications.
- During this two day period, you will be given a small injection of a radiotracer in a vein of the arm. The physician will be able to see your anatomy, which is the size, shape, and location of the gland.
- After the injection and a brief wait, we will take images of the thyroid using a special camera.
- Physiology will help us determine the function of the thyroid gland to see how it is working. For this portion of the exam, you will be asked to swallow a pill which contains a small amount of radioactive material. The technologist will ask you to return to the department to take measurements of the thyroid gland using a special piece of equipment.
After the procedure
- Follow up with ordering doctor.
- Tell the technologist if you are planning to travel out of the country.
- If you are pregnant or suspect you may be, contact your referring doctor.
- This is a two-day exam.
- For Macomb patients: Please note that our Nuclear Medicine equipment has a table weight limit of 500 lbs.