Flow Function Method for Quantitative Streamlines on the Ultrasonic Doppler Image in Three-Dimensional Flow

Ultrasonic color Doppler image is a map of Doppler velocity in an observation plane in three-dimensional flow. Doppler velocity is the velocity component of flow in the direction of ultrasonic beam. Flow function method estimates the velocity components on the observation plane of the flow as a flow function using the information of the ultrasonic color Doppler image. The folw function with point sources is introduced. It is displayed by streamlines.