thyroid gland diseases are common around the world. Diagnosis is usually by thyroid profile estimation levels. The accuracy of Doppler ultrasonography is accurate and sensitive in evaluating the gland in detail (size, margins and nodule’s). The indices like peak systolic volume, pulsatility index and resistive index is useful for diagnosing pathological thyroid. The aim of the study was to assess the findings of Doppler indices [PSV, PI, RI] of bilateral superior thyroid arteries [STAs] in normal and pathological thyroid conditions and use them as reference to evaluate the thyroid status and correlate the USG findings with thyroid function tests.