An ultrasonic transducer is rotated until the displayed vessel has the smallest area. The transducer is then tilted to various angles with respect to a normal to a surface to obtain area and velocity measurements of fluid flow inside a vessel in a body imaged. A least mean square error calculation is...http://www.google.fr/patents/US5623930?utm_source=gb-gplus-shareBrevet US5623930 - Ultrasound system for flow measurement
