A thyroid pertechnetate scan is used to image the thyroid and evaluate its function.



To differentiate among the causes of thyrotoxicosis, that is Graves' disease from subacute, silent, postpartum, or factitious hyperthyroidism

Evaluation of congenital hypothyroidism

To relate the general structure of the gland to function- differentiate Graves' disease from toxic nodular goiter

To locate ectopic tissue

To determine function in specific area - query if palpable nodule is functional