Realtime colour flow mapping and Doppler studies of normal carotid vertebral system.

Real time colour blow mapping with doppler derived velocity profile of carotid vertebral arterial system in 26 normal controls, using Hewlett Packard Model HP 77020 equipment are presented. The normal peak velocities varied from 0.39 to 1.47 m/sec. The colour blow mapping of carotid-vertebral system, the first over to be published in India, to the best of our knowledge, enabled us to obtain more accurate carotid-vertebral arterial flows. Colour imaging makes it easy to differentiate normal from abnormal. We believe that colour blow mapping with Doppler studies will become the most important screening test for the evaluation of the extracranial carotid-vertebral system.