title: Instantaneous frequency, mean frequency, and variance of mean frequency estimators for ultrasonic blood velocity Doppler signals.
mesh_terms: D001783:Blood Flow Velocity; D004301:Doppler Effect; D006801:Humans; D008433:Mathematics; D008954:Models, Biological; D055585:Physical Phenomena; D010825:Physics; D011336:Probability; D014465:Ultrasonics