Diasonics, Inc.

Focus Surgery, Inc.

Diasonic Inc.

James W Pell

Gerald L Hansen

Alan R Selfridge

William H Stephens

Arthur W Zikorus

Richard E Spielmaker

A system having improved localization and wave generation apparatus for treatment of an area in the body of a patient. The system comprises a prelocation system allowing for initial localization of an area within a body of a patient. Following the initial localization step, the patient is moved into a treatment position using a sliding table top. A high power wave generation device is provided for generating waves for treating the area. The system further provides for an ultrasonic monitoring device, coupled with the high power wave generation device, allowing for real-time localization of the area. The disclosed system utilizes, as part of the wave generation device, a piezoelectric transducer, an acoustical lens coupled with the transducer and a means for coupling the transducer to receive voltage from a high power voltage means.

Treatment system with localization

An acoustical lens for focusing ultrasonic energy having a transducer, a curved focussing lens and a voltage generator coupled with the transducer. The transducer is comprised of an array of piezoelectric crystal elements. The focussing lens has a concave upper surface and a planar bottom surface allowing the array of piezoelectric elements to be coupled to the bottom surface of the array. The piezoelectric elements receive voltage from the voltage generator and transmit an energy ray through the focussing lens producing a focussed energy beam.

Lens assembly for focusing energy

A lithotripsy system having improved localization and shock wave generation apparatus. The lithotripsy system comprises an x-ray prelocation system allowing for initial localization of a calulus within a body of a patient. Following the initial localization step, the patient is moved utilizing a sliding table top into a treatment position. A high power shock-wave generation device is provided for generating shock waves for disintegrating the calculus. The lithotripsy system further provides for an ultrasonic monitoring device, coupled with the high power shock wave generation device, allowing for real-time localization of the calculi. The disclosed system utilizes, as part of the shock wave generation device, a piezoelectric transducer, an acoustical lens coupled with the transducer and a means for coupling the transducer to receive voltage from a high power voltage means.

Lithotripsy system

An acoustical lens for focusing ultrasonic energy having a transducer, a curved focussing lens and a voltage generator coupled with the transducer. The transducer is comprised of an array of piezoelectric crystal elements. The focussing lens has a concave upper surface and a planar bottom surface allowing the array of piezoelectric elements to be coupled to the bottomsurface of the array. The piezoelectric elements receive voltage from the voltage generator and transmit an energy ray through the focussing lens producing a focussed energy beam.

Acoustical lens assembly for focusing ultrasonic energy

A pulsed power supply for providing power to a piezoelectric crystal. The power supply provides power to the piezoelectric crystal causing contraction of the crystal. Upon reaching a predetermined degree of contraction, the electrical voltage form the power supply is removed from the piezoelectric crystal by creating a short-circuit between the power supply and the crystal. Removal of electrical voltage from the crystal causes the immediate expansion of the crystal and a resulting energy wave.

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Los Altos, CA, United States of America

James W Pell