Objective:To study the blood flow velocity based on the use of Particle Image Velocimetry(PIV)and Computational Fluid Dynamics(CFD).Methods:Three vascular phantoms with different degree of stenosis were prepared and used on PIV hardware platform for gathering ultrasound images to obtaine PIV results,at the same time,the PIV experimental conditions were used as the boundary of the CFD in the process of numerical modeling.Finally,results obtained by these two methods were compared and analyzed.Results:In 30% ...