Radioiodine uptake test

The Radioiodine uptake test measures how well the thyroid gland absorbs iodine, which is crucial for producing hormones that regulate metabolism. During the test, a small amount of radioactive iodine is given, usually by mouth. After a few hours or a day, a special camera detects the amount of iodine taken up by the thyroid. This information helps doctors diagnose thyroid conditions, such as hyperthyroidism (overactive thyroid) or hypothyroidism (underactive thyroid). The test is generally safe, with minimal radiation exposure comparable to a standard X-ray.