Portal dosimetry systems, devices, and methods
AssigneeVarian Medical Systems International AG
InventorsJanne NORD, Lasse Heikki TOIMELA
Life of this patent
Estimating the term…
Abstract
Systems, devices, and methods for dosimetric verification of radiation therapy treatments by selective evaluation of measurement points. Systems, methods, and computer program-products for providing dosimetric verification of radiation therapy treatments by evaluating measurement points using different evaluation criteria.
Claims27
1-50. (canceled)
A non-transitory computer-readable storage medium upon which is embodied a sequence of programmed instructions for evaluating radiation dose delivery to an object, which when executed by a computer processing system causes the computer processing system to:
- generate an image corresponding to radiation dose distributed in the object, the image including a plurality of points associated with different structures within the object;
- and
- determine radiation dose acceptability by evaluating the points using corresponding acceptability criterias,
- wherein the acceptability criterias are dependent on the structures associated with the compared points.
A non-transitory computer-readable storage medium upon which is embodied a sequence of programmed instructions for evaluating radiation dose delivery to an object, which when executed by a computer processing system causes the computer processing system to:
- generate an image corresponding to radiation distributed within the object, the image including at least one first point associated with a first structure within the object, and at least one second point associated with a second structure within the object;
- compare the generated image with a corresponding predicted image, the predicted image corresponding to a predicted distribution of radiation within the object, the comparing comprising comparing the first points in the generated image with corresponding first points in the predicted image and comparing the second points in the generated image with corresponding second points in the predicted image, the comparing of the first and second points in the generated image with the corresponding first and second points in the predicted image uses the same comparison parameter;
- and
- evaluate the compared first points using a first criteria and the compared second points using a second, different criteria.
A non-transitory computer-readable storage medium upon which is embodied a sequence of programmed instructions for evaluating radiation dose delivery to a target, which when executed by a computer processing system causes the computer processing system to:
- generate a radiation dose distribution image based on radiation delivered to the target according to a treatment plan, the generated radiation dose distribution image including at least a first point and a second point;
- compare the generated radiation dose distribution image with a corresponding predicted radiation dose distribution image, the comparing including comparing points in the generated radiation dose distribution image with corresponding points in the predicted radiation dose distribution image;
- evaluate the compared points using different evaluation criterias;
- and
- determine whether dose delivery is acceptable based on a result of the evaluation,
- wherein the evaluating includes evaluating the first point using a first gamma criteria including dose and spatial differences and evaluating the second point using a second gamma criteria including dose and spatial differences, the second gamma criteria being different than the first gamma criteria, or evaluating the first point against a maximum absolute dose value and the second point against a minimum absolute dose value.
A non-transitory computer-readable storage medium upon which is embodied a sequence of programmed instructions for evaluating radiation dose delivery to a target, which when executed by a computer processing system causes the computer processing system to:
- generate a radiation dose distribution image based on radiation delivered according to a treatment plan;
- project anatomical structures onto a measurement plane, the anatomical structures being associated with different gamma criterias;
- associate points in the generated distribution image with gamma criterias based on the projections;
- compare points in the generated radiation dose distribution image with corresponding points in the predicted radiation dose distribution image;
- evaluate the compared points using gamma criterias based on the associating;
- and
- determine whether dose delivery is acceptable based on a result of the evaluation.
A non-transitory computer-readable storage medium upon which is embodied a sequence of programmed instructions for selectively evaluating radiation dose delivery to a target, which when executed by a computer processing system causes the computer processing system to:
- generate a radiation dose distribution image based on radiation delivered to the target according to a treatment plan;
- compare the generated radiation dose distribution image with a corresponding predicted radiation dose distribution image, the comparing including comparing selected points in the generated radiation dose distribution image with corresponding points in the predicted radiation dose distribution image;
- evaluate the compared selected points;
- and
- determining whether dose delivery is acceptable based on a result of the evaluation,
- wherein the selected points include points selected based on patient surface information.
Dependencies are inferred from the claim text.