radioactive iodine uptake test
Noun: A medical diagnostic procedure that measures the rate at which the thyroid gland absorbs iodine from the bloodstream. The test involves administering a small, safe amount of radioactive iodine, typically iodine-123 or iodine-131, and then using a radiation detector to measure how much is collected by the thyroid over a specific period, usually 4 to 24 hours later.
This term is used exclusively in medical contexts to assess thyroid function. * The radioactive iodine uptake test is a standard procedure for evaluating hyperthyroidism. * Before starting treatment, the doctor ordered a radioactive iodine uptake test to determine the activity level of the gland. * Results from the radioactive iodine uptake test showed abnormally high uptake, confirming Graves' disease.
- The test is often abbreviated in medical notes as RAIU test.
- It is a specific type of , distinguished by its focus on quantifying the or absorption rate, rather than just producing an image (as in a thyroid scan).
- RAIU test (n.): The common clinical abbreviation.
- Thyroid uptake test (n.): A less specific synonym.
- Radioactive iodine test (n.): A broader category of diagnostic tests using radioactive iodine, which includes the uptake test and imaging scans.
- Thyroid radioactive iodine uptake test
- Iodine uptake study
- There is no direct antonym, as it is a specific medical procedure. A conceptually opposite result would be described as "low uptake" or "no uptake."
- High uptake: A test result indicating the thyroid is absorbing iodine more rapidly than normal, often associated with hyperthyroidism.
- Low uptake: A test result indicating the thyroid is absorbing iodine more slowly than normal, which can occur in conditions like thyroiditis or hypothyroidism.
- To have an uptake test done: The common phrasing for a patient undergoing the procedure.
- The patient will need to have an uptake test done next week.
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radioactive iodine test that measures the amount of radioactive iodine taken up by the thyroid gland
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