Scintillator-based radiation therapy quality assurance
AssigneeSun Nuclear Corporation
InventorJeffrey M. Kapatoes
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Abstract
Systems, methods, and computer software are disclosed for determining a shape of a radiation field generated by a radiation delivery system through the use of a scintillator and a camera that is configured to acquire images of light emitted by the scintillator during delivery of a radiation beam. A support structure may be mounted to the radiation delivery system and the scintillator and camera may be fixed to the support structure such that the scintillator is not perpendicular to the axis of the radiation beam. An edge detection algorithm may be applied to radiation patterns present in the camera images in order to determine the location of an edge of a leaf of a multi-leaf collimator.
Claims19
A system for determining at least a portion of a shape of a radiation field generated by a radiation delivery system that includes a radiation source configured to deliver a radiation beam, the system comprising:
- a scintillator;
- a camera configured to acquire images of light emitted by the scintillator during delivery of the radiation beam;
- and
- a support configured to be mounted to the radiation delivery system, the scintillator and the camera fixed to the support such that when the support is mounted to the radiation delivery system, the scintillator is not perpendicular to an axis of the radiation beam, wherein the scintillator is transparent and allows formation of a pattern at a target location for determining a shape of a collimator aperture when a light source shines light through the collimator aperture.
A computer program product comprising a non-transitory, machine-readable medium storing instructions which, when executed by at least one programmable processor, cause the at least one programmable processor to perform operations comprising:
- controlling a camera to acquire images of light emitted by a scintillator during delivery of a radiation beam, the scintillator and the camera fixed to a support such that when the support is mounted to a radiation delivery system, that the scintillator is not perpendicular to an axis of the radiation beam, the images capturing at least a portion of a shape of a radiation field generated by the radiation delivery system that includes a radiation source configured to deliver the radiation beam,
- wherein the scintillator is transparent and allows formation of a pattern at a target location for determining a shape of a collimator aperture when a light source shines light through the collimator aperture.
Dependencies are inferred from the claim text.