Radioactive iodine uptake (RAIU) is a test of thyroid function. It measures how much radioactive iodine is taken up by the thyroid gland in a given time period.
See also:
Iodine uptake test; RAIU
You are asked to swallow a liquid or capsule containing radioactive iodine.
After a certain period of time (usually 6 and 24 hours later), you must return to the testing center so that the amount of radioactivity in the thyroid gland can be...
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