Various diagnostic tests are employed to assess thyroid function and diagnose potential disorders. These include blood tests that measure hormone levels, such as:
* TSH (Thyroid-Stimulating Hormone)
* T3 and T4 (Triiodothyronine and Thyroxine)
* Free T3 (FT3) and Free T4 (FT4)

In addition to these hormonal assessments, imaging techniques like thyroid scintigraphy (scan) and thyroid ultrasound are also utilized to evaluate thyroid health and identify structural abnormalities.