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

 

Indications

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