Mutileaf collimator for radiotherapy machines
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United States of America Patent
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Sep 19, 1989
Issued Date -
N/A
app pub date -
Mar 7, 1988
filing date -
Sep 10, 1986
priority date (Note) -
Expired
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Abstract
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.
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