BS IEC 62736. Ultrasonics. Pulse-Echo Scanners. Quality Control of Diagnostic Medical Ultrasound Systems. Simple Methods for Periodic Testing to Verify Stability of an Imaging System’s Elementary Performance Ultrasonics, Acoustics, Acoustic measurement, Ultrasonic frequencies, Power measurement, Liquids, Transducers, Radiant flux density, Flux (rate), Test equipment, Testing conditions, Accuracy, Formulae (mathematics)