Radioactive Iodine Uptake Test
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.
foods with iodine, such as shellfish, iodized salt, or kelp.
- Having other tests using
contrast materials in the past 4 weeks.
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 topics
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 topic
Other Works Consulted
Fischbach FT, Dunning MB III, eds. (2009). Manual of Laboratory and Diagnostic Tests, 8th ed. Philadelphia: Lippincott Williams and Wilkins.
Primary Medical Reviewer
||E. Gregory Thompson, MD - Internal Medicine
Specialist Medical Reviewer
||Matthew I. Kim, MD - Endocrinology
||May 31, 2011
WebMD Medical Reference from Healthwise
May 31, 2011
This information is not intended to replace the advice of a doctor.
Healthwise disclaims any liability for the decisions you make based on this
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