05443068 is referenced by 86 patents and cites 9 patents.

A positioner for a magnetic resonance (MR) surgery system which positions a focal point of an ultrasound transducer to selectively destroys tissue in a region within a patient. The positioning means moves an ultrasound transducer under the control of an operator. Mechanical threaded shafts and slides act as screw drives causing several connected slides to move the ultrasound transducer in three dimensions. Expanding shafts are connected between a fixed point on a housing and the actuating point of the threaded shafts. Two of the expanding shafts employ universal joints allowing the shafts to rotate as they follow the slides. The third expanding shaft need only expand but the relative angle between its attachment points does not change, thereby eliminating the need for universal joints. An MR imaging system employing a temperature sensitive pulse sequence, creates an image of the tissue and the region being heated to allow the operator to adjust the position of the ultrasonic transducer so as to direct ultrasonic energy to the appropriate location.

Title
Mechanical positioner for magnetic resonance guided ultrasound therapy
Application Number
8/312247
Publication Number
5443068
Application Date
September 26, 1994
Publication Date
August 22, 1995
Inventor
Walter R Abeling
Amsterdam
NY, US
Kenneth W Rohling
Burnt Hills
NY, US
Harvey E Cline
Schenectady
NY, US
Agent
Marvin Snyder
Lawrence P Zale
Assignee
General Electric Company
NY, US
IPC
A61B 5/055
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