Siddharth Bhattacharjee, MBBS, MRCP (UK); Richa D. Jain, MD; Lokesh Bathala, DM; Anuradha HK, DM; Vijay K. Sharma, MD – Cervical duplex ultrasonography (CDU) is a simple, non-invasive, portable technique, that provides valuable high-quality visual information about the integrity of the carotid and vertebral vessels, plaque morphology and flow hemodynamics.