This technique is now supplemented by in vitro and other tests.
The patient is administered a radiotracer which infiltrates the intrathyroid iodine cycle. As occurs in all nuclear medicine tests, the patient is exposed to radiation which assessed in order to justify the indications.
This approach is now often used for visual evaluation of functional images of the thyroid, revealing the positive thyroid cells.
In vivo thyroid testing has continued to advance with recent radiopharmaceutical progress and available equipment..