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Radioactive Iodine Uptake
Alternate Names : Iodine Uptake Test, RAIU
Definition A test of thyroid function that measures the amount of orally ingested radioactive iodine that accumulates in the thyroid gland (see also "thyroid scan").
Pictures & Images
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Why is the Test Performed?
This test is performed to evaluate thyroid function, particularly when blood tests of thyroid function (for example, T3 or T4 levels) have abnormal results.
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• Definition
• Why is the Test Performed?
• How is the Test Performed?
• How to Prepare for the Test?
• How will the Test Feel?
• Normal Values
• What do Abnormal Results Mean?
• Special Considerations
• Risks
• Pictures & Images
Topics that might be of interest to you Diseases & Conditions
• Allergies
• Chronic Thyroiditis (Hashimoto's Disease)
• Colloid Nodular Goiter
• Goiter
• Graves' Disease
• Hyperthyroidism
• Hypothyroidism
• Painless (Silent) Thyroiditis
• Subacute Thyroiditis
• Thyroid Diseases
• Toxic Nodular Goiter
Tests & Exams
• ACTH
• Albumin - Serum
• RT3U
• T3
• T4 Test
• Thyroid Scan
• TSH
Other Topics
• Diarrhea
• Shellfish
Review Date : 2/27/2002
Reviewed By : Donna R. Cooper, M.D., M.P.H., Department of Medicine, Massachusetts General Hospital, Boston, MA. Review provided by VeriMed Healthcare Network.
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