An ultrasonic probe includes an ultrasonic transmitting/receiving element which uses a piezoelectric member constituted by a solid-solution based single crystal of zinc lead niobate-lead titanate, so that low-frequency driving can be achieved, the thickness of the piezoelectric member in the direction...http://www.google.fr/patents/US5295487?utm_source=gb-gplus-shareBrevet US5295487 - Ultrasonic probe
