Time-resolved pre-treatment portal dosimetry systems, devices, and methods
AssigneeVarian Medical Systems International AG
InventorsFrans Verhaegen, Mark Podesta, Sebastiaan M. J. J. G. Nijsten, Lucas C. G. G. Persoon, Christof Baltes, Stefan G. Scheib
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Abstract
Systems, devices, and methods for pre-treatment verification of radiation dose delivery in arc-based radiation therapy devices using a time-dependent gamma evaluation method.
Claims22
A system for determining radiation dose delivery, comprising:
- an imaging device generating images of incident radiation dose;
- and
- a processing device operably connected to the imaging device and configured to generate a time sequence of generated images by resampling the generated images into predetermined time intervals,
- the processing device being further configured to evaluate radiation dose delivery by assessing an amount of change of a parameter over time based on a result of comparing the generated images and corresponding predicted images belonging to same time intervals in the sequence.
A method for determining radiation dose delivery, comprising:
- generating images of incident radiation;
- generating a time sequence of generated images by resampling the generated images into predetermined time intervals;
- comparing the generated images with corresponding predicted images belonging to same time intervals in the sequence;
- and
- assessing an amount of change of a parameter over time based on the comparison.
A non-transitory computer-readable storage medium upon which is embodied a sequence of programmed instructions for determining radiation dose delivery in a radiation treatment system including a computer processing device which executes the sequence of programmed instructions embodied on the computer-readable storage medium to cause the computer processing device to perform the steps of:
- obtaining images of incident radiation dose;
- generating a time sequence of the obtained images by resampling the images into predetermined time intervals;
- comparing the obtained images with corresponding predicted images belonging to same time intervals in the sequence;
- and
- assessing an amount of change of a parameter over time based on the comparison.
Dependencies are inferred from the claim text.