Multi-Leaf Collimator Synchronization for Radiotherapy Precision
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In radiotherapy, existing systems often fail to synchronize the treatment process of the radiation source with the conformation process of the multi-leaf collimator, leading to increased radiation damage to normal tissues due to treatment errors caused by patient movement or changes in lesion shape during continuous treatment between adjacent points.
Innovation Solution
A method and system for controlling a multi-leaf collimator that receives treatment data including position and radiation field shape information for multiple treatment points, allowing the collimator to conform to each point's shape synchronously with the radiation source's treatment, ensuring accurate and safe radiation therapy by rotating the treatment head and adjusting the collimator's position dynamically.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the treatment head rotates continuously between treatment points, then treatment efficiency is improved, but treatment precision deteriorates due to asynchrony between radiation source and collimator conformation
Solution Approach 1:
The control system continuously monitors the rotation angle of the treatment head and the conformation state of the multi-leaf collimator, using feedback signals to adjust the conformation speed and ensure synchronous operation with the radiation source during continuous rotation between treatment points
Solution Approach 2:
The system transitions from static, discrete point-by-point treatment to dynamic continuous rotation treatment, where the treatment head rotates continuously between treatment points while the collimator dynamically adjusts its conformation in real-time to match the changing radiation field requirements
2Manufacturing precision
If the multi-leaf collimator conforms to each treatment point sequentially, then radiation field accuracy is improved, but treatment time increases
Solution Approach 1:
The treatment head rotates continuously without stopping between treatment points, and the multi-leaf collimator continuously adjusts its conformation during rotation, eliminating idle time and maintaining useful action throughout the entire treatment process
Solution Approach 2:
The control system pre-calculates the optimal conformation positions and timing for the multi-leaf collimator based on the treatment plan, enabling the collimator to be in the correct conformation state in advance as the treatment head approaches each treatment point during continuous rotation
Data Source
AI summary
A method and system of controlling a multi-leaf collimator, wherein steps of the method includes: receiving treatment data, and the treatment data includes position information of N treatment points, conformal position information of N treatment points and radiation field shapes of N treatment points; controlling a treatment head to a conformal position of a first treatment point, and controlling the multi-leaf collimator to begin to conform to a radiation field shape of the first treatment point so as to start a treatment of the first treatment point; controlling the treatment head to a conformal position of a Kth treatment point, and controlling the multi-leaf collimator to begin to conform to a radiation field shape of the Kth treatment point so as to start a treatment of the Kth treatment point; carrying out the described operations repeatedly until the conformation of the radiation field shape and the treatment of all treatment points are completed.