An ultrasound therapy system utilizes a mechanical positioning assembly to locate and aim an ultrasonic transducer. The positioner provides for roll and pitch control as well as control in the lateral and longitudinal directions. The positioner uses piezo-electric vibrational motors that can effectively...http://www.google.com/patents/US6582381?utm_source=gb-gplus-sharePatent US6582381 - Mechanical positioner for MRI guided ultrasound therapy system
