04936303 is referenced by 81 patents and cites 8 patents.

A method and apparatus for the treatment of tumors by heating with ultrasonic energy. A transducer assembly is provided in a housing having a refractive assembly disposed between the tumor and the transducer. The refractive assembly moves with respect to the transducer assembly. The refractive assembly includes one or more refractive elements. The refractive assembly is interchangeable to provide treatment of different types of tumors using the same transducer assembly and housing. The refractive assembly may focus, deflect or diffuse the ultrasonic energy depending on the arrangement of elements. Motion of the refractive assembly relative to the tumor results in a time-averaging spatial deposition pattern which is more highly uniform due to the averaging of maxima and minima which occurs in the near field.

Title
Ultrasonic heating apparatus and method
Application Number
7/123218
Publication Number
4936303
Application Date
November 20, 1987
Publication Date
June 26, 1990
Inventor
Robert F McConaghy
Kirkland
WA, US
George W Keilman
Woodinville
WA, US
Sheldon P Detwiler
Bellevue
WA, US
Agent
Seed and Berry
Assignee
UltraThermics
WA, US
IPC
A61F 7/00
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