A shock wave treatment apparatus, in which a shock wave generator generates a shock wave toward a living body having an object to be disintegrated by the shock wave, and an ultrasonic wave probe transmits an ultrasonic wave toward the living body and receives an ultrasonic wave echo from the living body,...http://www.google.com/patents/US5174294?utm_source=gb-gplus-sharePatent US5174294 - Shockwave treatment apparatus
