The scanner detects the location and intensity of the gamma rays emitted by the iodine. During this part of the procedure, you must lie still to enable the scanner to get a clear image. Next, the information is sent to a computer that displays a 2-dimensional image of the thyroid and any nodules that have absorbed the iodine. The image is recorded in the computer and can be reproduced on X-ray film or a computer printout. How The Test Will Feel The iodine mixture may cause slight nausea when you take it.
Some patients find remaining still during the test uncomfortable.
How To Prepare For The Test You must sign a consent form. Fasting overnight is a usual requirement. Remove jewelry, dentures, or other metals, because they may interfere with the image. The physical and psychological preparation you can provide for this or any test or procedure depends on your child's age, interests, previous experience, and level of trust. The thyroid appears the correct size, shape, and in the proper location.