The Thyroid Uptake Iodine 131 Test generally checks thyroid function.
Since iodine is one of the raw materials for thyroid hormone synthesis by the thyroid gland, radioactive iodine 131 can be ingested and participate in the synthesis of thyroid hormones, and the amount and speed of iodine intake by the body is closely related to thyroid function. Introducing iodine 131 into the body of the patient, and determining the change in the radioactivity counts of the thyroid gland area can help to understand the situation of iodine 131 uptake by the thyroid gland, and determine the function of the thyroid gland.
Iodine 131 uptake by the thyroid gland is determined by stopping the use of iodine-rich foods and medications, such as seafood, iodine preparations, thyroid hormones, and antithyroid medications. The 131 iodine solution, solution or capsule is taken orally on an empty stomach, and an equal amount of 131 iodine is placed into the neck model as a standard source, and the radioactivity counts of the thyroid site are measured at 2 hours, 4 hours and 24 hours after taking the drug.
It is recommended to go to the hospital if there is an abnormal result of the thyroid iodine 131 uptake test.