Thyroid Scan

Radioactive Thyroid Scan, Technetium Scan of the Thyroid

What Affects the Test

Reasons you may not be able to have the test or why the results may not be helpful include:

• Taking thyroid medicine.
• Eating foods with iodine, such as shellfish, iodized salt, or kelp.
• Having other tests using contrast materials in the past 4 weeks.

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Author:	Caroline Rea, RN, BS, MS	Last Updated: August 14, 2008
Medical Review:	Caroline S. Rhoads, MD - Internal Medicine Matthew I. Kim, MD - Endocrinology & Metabolism
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