Methods for radiation delivery quality assurance
OwnerAmir RAMEZANZADEH MOGHADAM, George Andrew ZDASIUKinventors
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Abstract
Described herein are methods and systems for generating a MV detector image for evaluating the quality of radiation delivery according to a radiotherapy treatment plan. The MV detector image is generated from MV detector measurements of a small number of multi-leaf collimator (MLC) leaf openings.
Claims36
1-51. (canceled)
A method for evaluating the quality of radiation delivery, the method comprising:
- generating a simulated radiation detector image corresponding to a treatment plan fluence map using imaging data of single leaf openings and double leaf openings of an MLC;
- delivering radiation according to the treatment plan fluence map using the therapeutic radiation source of a radiotherapy system;
- acquiring radiation detector imaging data during radiation delivery to generate a radiation detector image;
- determining image differences between the acquired radiation detector image and the simulated radiation detector image;
- and
- generating a graphical representation that depicts the image differences between the acquired radiation detector image and simulated radiation detector image.
A radiotherapy system comprising a therapeutic radiation source, a multi-leaf collimator (MLC), a radiation detector and one or more controllers, at least one of which is in communication with each of the radiation source, MLC and imaging system, wherein the controller is, or the controllers are between them, configured to perform the steps of:
- generating a simulated radiation detector image corresponding to a treatment plan fluence map using imaging data of single leaf openings and double leaf openings of the MLC;
- delivering radiation according to the treatment plan fluence map using the therapeutic radiation source;
- acquiring radiation detector imaging data during radiation delivery to generate a radiation detector image;
- determining image differences between the acquired radiation detector image and the simulated radiation detector image;
- and
- generating a graphical representation that depicts the image differences between the acquired radiation detector image and simulated radiation detector image.
A method for generating a radiation detector image that corresponds to a treatment plan fluence map, the method comprising:
- acquiring, for each leaf of a multi-leaf collimator, imaging data of a single leaf opening and a double leaf opening using a radiation source and a radiation detector;
- and
- combining the acquired imaging data to generate a radiation detector image to match a pattern of MLC openings that correspond with a treatment plan fluence map.
A radiotherapy system comprising a radiation source, a multi-leaf collimator (MLC), a radiation detector and one or more controllers, at least one of which is in communication with each of the radiation source, MLC and imaging system, wherein the controller is, or the controllers are between them, configured to perform the steps of:
- acquiring, for each leaf of a multi-leaf collimator, imaging data of a single leaf opening and a double leaf opening using a radiation source and a radiation detector;
- and
- combining the acquired imaging data to generate a radiation detector image to match a pattern of MLC openings that correspond with a treatment plan fluence map.
Dependencies are inferred from the claim text.