title: A motion artefact in real-time ultrasound scanners.
abstract: Motion observed in real-time ultrasound images may be very misleading. The speckle pattern in images of soft tissue is an artefact and it may move in a way which bears no simple relationship to the motion of the tissues. The physical origin of this anomaly is described.
mesh_terms: D055592:Biophysical Phenomena; D001703:Biophysics; D008433:Mathematics; D014465:Ultrasonics / Q000295:instrumentation