Thyroid 131 Iodine Test

The thyroid 131 iodine (131I) test is based on the following principles. Iodine is one of the raw materials for thyroid hormone synthesis by the thyroid. The radioactive 131I can also be taken up and participate in the synthesis of thyroid hormones. The amount and speed of 131I is related to thyroid function. closely related. 131I is introduced into the subject, and the changes in the radioactive count of the thyroid site can be measured using an in vitro detection device to understand the uptake of 131I by the thyroid gland, thereby determining the function of the thyroid gland.