Radiotherapy apparatus configured to track a motion of a target region using a combination of a multileaf collimator and a patient support
AssigneeElekta AB (publ)
InventorDavid Anthony Roberts
Life of this patent
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Abstract
The present invention provides a radiotherapy apparatus for applying therapeutic radiation to a target region of a patient, comprising a patient support, a source of radiation, a collimator comprising a plurality of leaves, a sensing system and control circuitry. The position of a target region is determined and resolved into two components orthogonal to the radiation beam axis. One component is assigned to the patient support, and the other to the collimator leaves, such that movement of the target region is compensated for and the radiation beam intersects is correctly targeted.
Claims13
A radiotherapy apparatus for applying therapeutic radiation to a target region of a patient, the apparatus comprising:
- a patient support, on which the patient is positioned for treatment;
- a source of radiation, arranged to emit a beam of radiation along an axis towards the patient;
- a collimator comprising a plurality of leaves, moveable into the radiation beam in order to delimit an extent of the radiation beam;
- a sensing system, configured to determine a position of a target region;
- and
- control circuitry, configured to resolve said position into a first component in a first direction orthogonal to the radiation beam axis and a second component in a second direction orthogonal to the radiation beam axis, and to control the patient support to move in the first direction according to the first component, and the plurality of collimator leaves to move in the second direction according to the second component, such that the radiation beam intersects the target region.
A method of treating a patient by radiotherapy, in which a radiotherapy apparatus comprises a patient support, on which the patient is positioned for treatment, a source of radiation, arranged to emit a beam of radiation along an axis towards the patient, and a collimator comprising a plurality of leaves, moveable into the radiation beam in order to delimit the extent of the radiation beam, the method comprising:
- determining a position of a target region in the patient;
- resolving said position into a first component in a first direction orthogonal to the radiation beam axis, and a second component in a second direction orthogonal to the radiation beam axis;
- and
- moving the patient support in the first direction according to the first component, and the plurality of collimator leaves in the second direction according to the second component, such that the radiation beam intersects the target region.
Dependencies are inferred from the claim text.