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Because the thyroid absorbs iodine from the blood stream, and since it is a radioactive isotope, it can be easily visualized, so you can see how strongly the thyroid is absorbing it.

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What are the main uses of iodine 131?

Iodine-131 is used in nuclear medicine for diagnostic and therapeutic purposes. It is commonly used in the treatment of thyroid disorders, such as hyperthyroidism and thyroid cancer, by delivering targeted radiation to the thyroid tissue. Additionally, it is used in diagnostic procedures to assess thyroid function and detect thyroid nodules or tumors.


What are thyroid function tests used for?

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What is a T4 assay used for?

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What color tube used for thyroid testing?

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What color tube is used for thyroid testing?

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What procedures are used in diagnosing thyroid disorders?

Sonograms and computed tomography scans (CT scans ) help to determine the size of the thyroid gland and location of abnormalities. A nuclear medicine scan may be used to assess thyroid function


Why is iodine important for proper thyroid function?

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