title: Phase-locked loop techniques applied to ultrasonic Doppler signal processing.
abstract: A new method of measuring blood flow velocity and acceleration using analogue and phase locked loop techniques is described. Instantaneous peak velocity, instantaneous mean velocity and acceleration can be obtained on-line and displayed on simple recording systems.
mesh_terms: D001783:Blood Flow Velocity; D003202:Computers, Analog; D003936:Diagnosis, Computer-Assisted; D004301:Doppler Effect; D009862:Online Systems; D014465:Ultrasonics / Q000295:instrumentation*; D014463:Ultrasonography