Radiant energy – Radiation controlling means
Reexamination Certificate
2005-04-12
2005-04-12
Wells, Nikita (Department: 2881)
Radiant energy
Radiation controlling means
C250S492100, C315S505000, C315S500000
Reexamination Certificate
active
06878951
ABSTRACT:
A device for generating helical electron beams that can be used for radiation therapy is disclosed. The device contains a tertiary collimating cone that can be attached to a gantry of a linear accelerator or placed directly below the gantry. The tertiary collimating cone has a dynamic energy compensator and a magnetic electron collimator to modify the energy of electrons and to generate a helical trajectory. A multileaf collimator may be present within the tertiary collimating cone. A computer coordinates the movements of various components. The helical electron beam produced by this device can be targeted to tumors better and safer and reduce the amount of radiation hitting normal tissue than current devices.
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Johnston Phillip A
University of Maryland
Wells Nikita
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