Abstract
A dual-transducer acoustic time domain correlation technique has been developed to measure instantaneous blood flow speed and direction. The experiment was performed with an artificial blood flow system in a water tank. The volumetric flow velocity as well as the instantaneous flow velocity at any sites in an artificial blood vessel can be measured with the dual-transducer technique. In the steady flow measurements, the volumetric flow rates estimated from the dual-transducer technique were within the error range of 8% from those of the hydrodynamic flow measurements. Even in the turbulent flow measurements, the instantaneous flow speed and direction can be determined at any sites in the vessel with the dual-transducer acoustic time domain correlation technique.
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