Subcutaneous neural stimulation or local tissue destruction
Device for localized heating of biological tissues
Ultrasound hyperthermia applicator with variable coherence by multi-spiral focusing
Ultra sound hyperthermia device
Hyperthermia treatment method and apparatus
Lithotripsy work station
Invasive microwave array with destructive and coherent phase
ApplicationNo. 275809 filed on 07/15/1994
US Classes:601/3, Hyperthermia600/439, With therapeutic device601/2, Ultrasonic607/154High frequency radiation type
ExaminersPrimary: Kamm, William E.
Assistant: Casler, Brian L.
Attorney, Agent or Firm
Foreign Patent References
International ClassA61N 007/02
AbstractAn ultrasound hyperthermia applicator suitable for medical hyperthermia treatment, and method for using the same, includes two ultrasound sources producing focused ultrasound beams of frequencies f0 and f1. An aiming device directs the two ultrasound beams so that they cross each other confocally at the target. A controller activates the two ultrasound sources so that the target is simultaneously irradiated by the two focused ultrasound beams. The two ultrasound sources provide acoustic energy sufficient to cause significant intermodulation products to be produced at the target due to the interaction of the two ultrasound beams. The intermodulation products are absorbed by the target to enhance heating of the target. In preferred embodiments the ultrasound sources include pair of signal generator for producing gated ultrasound output signals driving single crystal ultrasound transducers. In other embodiments the ultrasound sources include a pair of phased array ultrasound transducers for generating two steerable ultrasound beams. An aiming device is provided for electronically steering and focusing the two ultrasound beams so that they cross each other confocally at the target. Further embodiments employ pluralities of transducers, arrays, or both.