Radioactive Iodine Uptake Test

Iodine Uptake Test, Radioactive

Why It Is Done

A radioactive iodine uptake (RAIU) test is done to:

• Find the cause of an overactive thyroid gland (hyperthyroidism).
• Plan treatment for hyperthyroidism or a thyroid lump (thyroid nodule).
• See whether thyroid cancer has spread to other areas of the body.

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Author:	Douglas Dana Jan Nissl, RN, BS	Last Updated: December 1, 2006
Medical Review:	Adam Husney, MD - Family Medicine Caroline S. Rhoads, MD - Internal Medicine David C.W. Lau, MD, PhD, FRCPC - Endocrinology & Metabolism
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