Radiotherapy Collimator Control for Spiral Tumor Coverage
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Solution Overview
Problem
Existing radiotherapy systems are limited by the size of beam collimation, restricting the ability to treat tumors of various sizes and locations effectively.
Innovation Solution
A radiotherapy system with a multi-leaf collimator that allows leaves to stop at any position along a movement path, combined with a control mechanism that synchronizes the gantry rotation and treatment couch movement, enabling a multi-circle spiral intensity-modulated treatment mode.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a fixed beam collimation size is used, then the device structure is simple, but the treatment range is limited and cannot accommodate tumors of various sizes
Solution Approach 1:
The collimator structure is transformed from a fixed state to a dynamic state where the collimation size can be adjusted during operation. The patent implements a movable collimator that can change its opening size along the beam axis, enabling adaptation to different tumor sizes while maintaining a relatively simple overall device structure.
2Adaptability or versatility
If the gantry rotates to treat different body parts, then the treatment coverage is improved, but the coordination with patient positioning becomes complex
Solution Approach 1:
The system implements synchronized control between gantry rotation and treatment couch movement through a coordination mechanism that monitors and adjusts both components. This feedback-based approach ensures that the collimator position, gantry angle, and patient positioning remain coordinated throughout the treatment process, enabling comprehensive body coverage while managing system complexity.
Data Source
AI summary
The present disclosure provides a radiotherapy system, including a treatment couch, a gantry, a treatment head coupled to the gantry, and a control mechanism. The control mechanism is configured to control the gantry to rotate, and synchronously control the treatment couch to move along an axial direction of the gantry; and the treatment head includes a multi-leaf collimator, the multi-leaf collimator being configured so that leaves are capable of stopping at any position along a movement path to form radiation fields of various shapes.