An ultrasound system includes a transducer array having a plurality of transducer elements for transmitting ultrasound pulses and for receiving-echo pulses in response thereto, a circuit for energizing each transducer element, or batches of elements of the array, in turn, to generate an ultrasound pulse,...http://www.google.fr/patents/US6254542?utm_source=gb-gplus-shareBrevet US6254542 - Ultrasonic visualization method and apparatus
