Validation of a theoretical approach for estimation of velocity error of a Vector Doppler system

In arterial stenoses, where the flow velocity can be inclined significantly to the vessel axis, single beam Doppler systems give large errors in estimated maximum velocity. These errors can potentially, be reduced by using a 2-beam system. The aim was the derivation and validation of simple equations for predicting the velocity estimation error of a 2-beam vector Doppler system. These were compared with results from a computer model of a linear array based system, and flow rig measurements using the same system