04868844 is referenced by 213 patents and cites 21 patents.

In a radiation therapy machine it is desirable to produce irregular radiation field shapes in order to shield critical organs not invaded by the tumor. A multileaf collimator is formed of a multiplicity of heavy metal bar leaves driven relative to frames which are driven relative to jaws of a rectangular field collimator by electric motors and flexible cables.

Title
Mutileaf collimator for radiotherapy machines
Application Number
905988
Publication Number
4868844
Application Date
March 7, 1988
Publication Date
September 19, 1989
Inventor
Craig S Nunan
Los Altos Hills
CA, US
Agent
Kenneth L Warsh
Gerald M Fisher
Stanley Z Cole
Assignee
Varian Associates
CA, US
IPC
G21K 1/04
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