A Video System for Measuring the Blood Flow Velocity in Microvessels

A video correlating system has been developed to measure the velocity of flowing blood in a microvessel. As the velocity of a red blood cell in a microvessel is given by the ratio of distance moved ΔL to the incremental time At, we fix At in our system according to the framing rate of the video system and employ the video signal to find ΔL by cross correlation.