Apparatus and method for generating and directing ultrasound

Details Apparatus and method for generating and directing ultrasound Apparatus and method for generating and directing ultrasound

1984-01-30

1985-10-29

Howell, Kyle L.

Surgery

Truss

Perineal

128660, 310320, 73626, A61B 500, A61H 100

Patent

active

045495335

ABSTRACT:
The disclosed apparatus of the invention operates to generate and direct ultrasound over predetermined regions of a body, such as a programmed sequence of target points. A plurality of side-by-side tapered piezoelectric transducer elements are provided. Means are provided for energizing the transducer elements with electrical energy having a variable frequency. The frequency of the electrical energy is varied to change the direction of the ultrasound produced by the transducer elements. In the preferred embodiment of the invention, a processor is responsive to a coordinate of an input target point for controlling the variation of frequency. In one form of the invention, means are provided for varying the relative phases of the electrical energy applied to the transducer elements. In this form of the invention, the processor means is also responsive to at least another coordinate of the input target point for controlling the variation of the relative phases. In another form of the invention, means are provided for selectively enabling at least one of the transducer elements. In this embodiment, each of the transducer elements has an associated focusing lens, and the processor is responsive to a coordinate of the input target point for controlling the selective enablement.

REFERENCES:
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patent: 4441486 (1984-04-01), Pounds
patent: 4478085 (1984-10-01), Sasaki
Lehmann, J. F., "Therapeutic Heat and Cold", Williams & Wilkins Publ., Baltimore, .TM.1982, pp. 522-530.
Beard, R. E. et al, "An Annular Focus UTS Lens for Local Hyperthermia", UTS in Med. & Biol., vol. 8, #2, pp. 177-184, 1982.

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