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Thyroid Uptake and Scan

What to Expect During the Procedure

You will ingest a small amount of radioactive iodine in capsule form. This must circulate internally for 4-6 hours. You are free to leave the facility and resume normal activities until the return appointment time designated by the technologist. Upon return, you will sit in a chair in front of a cylindrical device that measures the amount of radioactivity in the thyroid. This takes approximately 5 minutes. Then, you will lie on the table on your back. Images are acquired in various positions for 20 minutes. The following day, you will return at your convenience for an additional measurement to determine thyroid function. This only takes about 5 minutes. Upon completion, you may resume your normal activities.

How Should I Prepare?
  • Nothing to eat 4 hours prior to the appointment. You may have water to drink.
  • No shellfish/seafood are to be consumed 24 hours prior.
  • No iodinated contrast studies (IVP, CT, myelogram, angiogram) 6 weeks prior to this exam.
  • Be off thyroid medications 6 weeks prior including supplemental iodine, herbs, kelp, and seaweed.
  • If blood work has been done to evaluate thyroid function, please ask your physician’s office to fax results to us for comparison.
What to Expect After the Procedure

There are no post procedural instructions suggested. You may resume normal eating and medications. Also, no driver is needed following this procedure. Reports will be sent to your physician within 5 business days. Contact your physician for any information pertaining to the findings.