A blood flow amount measuring apparatus includes an ultrasonic transducer for steering a region of interest of a subject to be measured with an ultrasonic beam and receiving echoes from that region. A Doppler calculation section detects a Doppler signal on a line orthogonal with the steering lines from...http://www.google.de/patents/US4790322?utm_source=gb-gplus-sharePatent US4790322 - Ultrasonic type blood flow amount measuring apparatus
