Couch Position Calibration Images for Radiation Therapy Alignment
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Solution Overview
Problem
The couch position in image guided radiation therapy systems deviates during movement between imaging and treatment devices, necessitating accurate calibration to ensure precise treatment alignment.
Innovation Solution
A method and system for generating calibration images by obtaining and analyzing images of a couch with marked points, determining their positions, and calculating correlation information to create precise calibration images for couch position adjustment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the couch moves between imaging and treatment devices, then the treatment can be performed, but the couch position deviates from the planned position
Solution Approach 1:
The patent applies preliminary action by performing couch position calibration before radiation treatment. A calibration image is generated showing the actual couch position, and this information is used to adjust the treatment plan to account for any position deviations, ensuring accurate treatment delivery despite couch movement
Solution Approach 2:
The patent implements feedback by capturing an actual image of the couch position, comparing it with the planned position, generating a calibration image that shows the deviation, and using this feedback information to correct the treatment plan. This closed-loop approach ensures continuous position verification and correction
2Measurement precision
If calibration images are generated to correct couch position, then position accuracy is improved, but additional time is required for image acquisition and processing
Solution Approach 1:
The patent applies partial action by focusing the calibration process on only the necessary elements - capturing images of the couch with positioning marks and generating calibration images for position correction. This selective approach achieves adequate calibration accuracy without requiring exhaustive measurement of all couch parameters, thus reducing calibration time
Data Source
AI summary
The present disclosure provides a system and method for couch position calibration. The method may include obtaining one or more first images of a couch at one or more first locations in a first device, each of the one or more first images corresponding to one of the one or more first locations, wherein the couch includes a mark, and the mark intersects a first reference plane of the first device at a plurality of first points of the mark; determining, in each of the one or more first images, a first position of a representation of each of the plurality of first points; obtaining correlation information between the first position and actual position of each of the plurality of first points; and determining one or more calibration images based on the correlation information and the one or more first images.