Radioactive Iodine Uptake Test
A radioactive iodine uptake (RAIU) test uses a Reference radioactive tracer Opens New Window and a special probe to measure how much tracer the Reference thyroid gland Opens New Window Reference Opens New Window absorbs from the blood. The test can show how much tracer is absorbed by the thyroid gland and if it is evenly spread in the gland. This helps your doctor know if the thyroid gland is working properly. The radioactive tracer commonly used in this test is iodine.
A radioactive iodine uptake test is done to find problems with how the thyroid gland works, such as Reference hyperthyroidism Opens New Window. An RAIU test may be done at the same time as a thyroid scan.
|By:||Reference Healthwise Staff||Last Revised: Reference May 31, 2011|
|Medical Review:||Reference E. Gregory Thompson, MD - Internal Medicine
Reference Matthew I. Kim, MD - Endocrinology