Beam filter positioning device
AssigneeVarian Medical Systems, Inc.
InventorsChristopher E. Brown, Steven W. Prince, William A. Strachan, Stanley Mansfield, Stephen Mohr
Life of this patent
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Abstract
A system includes a beam filter positioning device including a plate configured to support one or more beam filters, and one or more axes operable to move the plate relative to a beam line. A control mechanism is coupled to the one or more axes for controlling the movement of the axes and configured to automatically adjust the position of at least one of the one or more beam filters relative to the beam line.
Claims26
A system comprising:
- a beam filter positioning device comprising a plate configured to support one or more beam filters, and one or more axes operable to move the plate relative to a beam line, said one or more axes comprising one or more servo motors and one or more feedback devices;
- and
- a control mechanism coupled to the one or more servo motors and the one or more feedback devices, said control mechanism being configured to adjust a position of at least one of the one or more beam filters relative to the beam line based on at least signals from the one or more feedback devices.
A beam filter positioning device comprising:
- a plate configured to support one or more beam filters;
- and
- two or more axes operable to move the plate.
A method of adjusting a beam filter position in a radiation system comprising the steps of:
- providing a plate and one or more beam filters supported by the plate;
- and
- moving the plate using one or more motion axes to position a beam filter relative to a beam line, said one or more axes comprising one or more servo motors and one or more feedback devices;
- wherein said step of moving is controlled by a control mechanism that is coupled to the one or more servo motors and the one or more feedback devices and operable by a computer software in an non-transitory computer readable medium to adjust the position of the beam filter.
A method of adjusting field light in a radiation system comprising the steps of
- providing a field light assembly including a mirror and a light source;
- and
- moving the mirror using at least one first motion axis and/or moving the light source using a second motion axis to provide a light field that would illuminate from a virtual light source, said first and second motion axes each comprising a servo motor and one or more feedback devices;
- wherein said step of moving the mirror and/or moving the light source are controlled by a control mechanism that is coupled to the servo motors and feedback devices and operable by a computer software in a non-transitory computer readable medium to adjust a position of the virtual light source in three degrees of freedom.
A beam filter device comprising:
- a body;
- a plurality of photon flattening filters supported by the body and arranged in an arc or circular configuration having a first radius;
- and
- a plurality of eletron scattering foils supported by the body and arranged in an arc or a circular configuration having a second radius that is different from the first radius.
Dependencies are inferred from the claim text.