05873845 is referenced by 187 patents and cites 20 patents.

A system for performing surgery by vibrational heating employs an ultrasonic transducer 80 for focusing a spherical ultrasound wave on a focal region. In one embodiment a refraction plate 410 having a spherical surface facing the transducer and a refracting surface with refracting pyramid elements 450 facing the subject causes the ultrasound beam to impinge on a plurality of overlapping focal regions and thereby expand the focal area of the transducer. In a second embodiment the refraction plate comprises a phased lens 600 having a constant thickness at any angular location but with its thickness varying linearly over 2.pi. radians or multiples thereof.

Title
Ultrasound transducer with focused ultrasound refraction plate
Application Number
8/818988
Publication Number
5873845
Application Date
March 17, 1997
Publication Date
February 23, 1999
Inventor
Kullervo Henrik Hynynen
Medfield
NY, US
George Raymond Russell
Albany
NY, US
Ronald Dean Watkins
Niskayuna
NY, US
Harvey Ellis Cline
Schenectady
NY, US
Agent
Douglas E Stoner
Marvin Snyder
Assignee
General Electric Company
NY, US
IPC
A61B 17/22
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