Radioactive Iodine Uptake Test

Iodine Uptake Test, Radioactive

What To Think About

• Blood tests may be done before a radioactive iodine uptake (RAIU) to measure the amount of thyroid hormones (TSH, T3, and T4) in your blood. For more information, see the medical tests Thyroid-Stimulating Hormone (TSH) and Thyroid Hormone Tests.
• A thyroid scan may be done at the same time as an RAIU test. For more information, see the medical test Thyroid Scan.

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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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