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US 2015/0085993 A1Published application
Dosimetric end-to-end verification devices, systems, and methods
AssigneeVarian Medical Systems International AG
InventorStefan SCHEIB
Life of this patent
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Abstract
Dosimetrical end-to-end quality assurance devices, systems, and methods for radiation devices using X-ray imaging, optical surface imaging, and electromagnetic navigational systems to position the quality assurance device either absolute or relative in space.
Claims24
A quality assurance device configured to provide position verification using a plurality of positioning systems, the device comprising:
- a support casing including a plurality of markers having predetermined positions within the support casing, the plurality of markers including one or more electromagnetic transponders;
- and
- a dosimetic insert arranged within the support casing, the dosimetric insert including a plurality of elements of different shapes, dimensions, and densities, the elements having predetermined positions relative to each other.
A method of determining a geometric parameter of a device, comprising:
- generating an image of a phantom including a plurality of markers, the plurality of markers including one or more transponders;
- determining a first position of the phantom based on a pattern of the markers in the generated image;
- generating a surface model of the phantom using an optical surface monitoring method;
- determining a second position of the phantom based on a comparison between the generated surface model and a reference surface model;
- determining a third position of the phantom by tracking the positions of the transponders in the phantom, and
- determining a geometric parameter of the device based on the first, and/or second, and/or third positions of the phantom.
3 more elements
Dependencies are inferred from the claim text.