Prospective evaluation of tumor visibility for igrt using templates generated from planning ct and contours
AssigneeVarian Medical Systems, Inc.
InventorsGary Fredric VIRSHUP, Hassan MOSTAFAVI
Life of this patent
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Abstract
The plan CT is described to generate dual energy (DRR) that stimulates the treatment time radiographs in order to prospectively evaluate the angles in which issues for the template matching algorithm are present, and thus the visibility of the tumor. The present invention uses template matching to quantify the “trackability” of the target from different angles or directions. The peak-to-side lobe ratio is used to measure trackability. The results of this process influence treatment planning. For example, based on the outcome, either less or no dose is planned for the angles in which the location of the templates cannot be verified and thus, the tumor.
Claims20
A method to optimize tracking of radiotherapy targets as part of treatment planning, comprising:
- simulating by a computer a treatment time image by from treatment planning images and data;
- generating by a computer a template from the planning images and data;
- template matching by a computer between the template and simulated image to quantify the trackability of tumors as part of treatment planning;
- and
- optimizing by a computer the selection of a template generation and imaging modality for each imaging angle during the treatment to maximize a trackability measure.
A method to predict trackability of tumors as part of treatment planning, comprising:
- simulating by a computer a treatment time image from a plan CT;
- generating by a computer a template from the planning data;
- and
- template matching by a computer between the template and simulated image to quantify the tumor tracking performance.
The computer program product comprising a computer readable storage medium structured to store instructions executable by a processor in a mobile device, the instructions, when executed cause the processor to:
- simulating by a computer a treatment time image by from treatment planning images and data;
- generating by a computer a template from the planning images and data;
- template matching by a computer between the template and simulated image to quantify the trackability of tumors as part of treatment planning;
- and
- optimizing by a computer the selection of a template generation and imaging modality for each imaging angle during the treatment to maximize a trackability measure.
Dependencies are inferred from the claim text.