Thyroid Uptake and Scan at Swedish

Information and Preparation Instructions

Please arrive in the Radiology department for the admissions process. A nuclear medicine technologist will greet you for the appointment. You will be given a small amount of iodinated radiotracer in capsule form. This will allow the technologist to measure and image the thyroid 6 hours later. During the 6-hour wait, you may leave and eat or drink as normal. Please return to the radiology waiting room when instructed by the technologist (about 6 hours; this is a time sensitive test). A measurement over the thyroid and thigh will be taken for 1 minute.  This will give the radiologist an idea of how much of the iodine was absorbed in the thyroid. A series of images will be taken over the thyroid area lasting approximately 40 minutes. You will be lying on your back during these images. Please be prepared, in some cases, you may be asked to return for another measurement of the thyroid the following morning. The technologist will let you know if this will be necessary before you leave.

Before Your Thyroid Uptake and Scan

  • No CAT or IVP scans with contrast 3 months prior to exam
  • No thyroid or anti-thyroid medications 10 days prior to exam
  • If you have any allergies to iodine, please let the technologist know
  • After taking the capsule, if you experience any vomiting, please let the technologist know immediately