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Localization and therapy system for treatment of spatially oriented focal disease

  • US 4,955,365 A
  • Filed: 06/22/1989
  • Issued: 09/11/1990
  • Est. Priority Date: 03/02/1988
  • Status: Expired due to Term
First Claim
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1. An ultrasound treatment transducer assembly for directing a focused beam at an anatomical site, said transducer assembly comprising:

  • an acoustic focusing lens having a concave front surface and a substantially flat back surface;

    a substantially flat piezoelectric transducer plate disposed in spaced relation to said focusing lens and having a rear surface and a front surface which is disposed at a fixed distance of separation with respect to the back surface of said acoustic focusing lens;

    an acoustic coupling medium disposed between the back surface of said focusing lens and the front surface of said transducer plate;

    first pressurizing means cooperatively arranged with said acoustic coupling medium for maintaining said acoustic coupling medium between said transducer plate and said focusing lens at a desired pressure; and

    air pressure means cooperatively arranged relative to the rear surface of said transducer plate and adapted to apply air pressure against said rear surface, wherein the pressure applied against said rear surface by said air pressure means is higher than the pressure on the front surface of said transducer plate due to said acoustic coupling medium.

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