A proton therapy rotating gantry motion control method, system, device and medium

By introducing a safety snapshot mechanism and hybrid fixed-angle determination logic, the problems of high coupling and dispersed safety interlocks in the control of the rotating gantry in the proton therapy system are solved, achieving efficient and reliable rotating gantry motion control and ensuring the safety and maintainability of proton therapy.

CN122431238BActive Publication Date: 2026-08-28FUJIAN RUISIKE MEDICAL TECHNOLOGY CO LTD
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Patent Information

Application Number
CN202610903645.9
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2026-06-23
Publication Date
2026-08-28
Estimated Expiration
2046-06-23

AI Technical Summary

Technical Problem

The control architecture of the rotating gantry in existing proton therapy systems has a high degree of coupling, a high risk of single-point failure, frequent misjudgments in determining the fixed angle position, scattered safety interlocking mechanisms and a lack of unified semantics, non-standard emergency stop recovery procedures, a lack of large-stroke homing strategy, and incomplete software working limit and target angle checks.

Method used

A security snapshot mechanism based on a predefined data structure is introduced to synchronously collect multi-source heterogeneous security status, generate security snapshots and perform logical operations, combine hybrid security angle determination logic, output standardized interlock signals, design a channel-specific emergency stop recovery process, verify the legality of the target rack angle and generate a position start pulse.

Benefits of technology

It reduces malfunctions caused by state asynchrony or signal jumps, improves rack positioning accuracy and reliability, simplifies control logic complexity, enhances system decision-making efficiency and reliability under high concurrency safety constraints, shortens troubleshooting time, and ensures the safety and maintainability of proton therapy.

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Abstract

The application relates to the technical field of equipment motion control, and discloses a proton treatment rotating gantry motion control method, system, equipment and medium, the method comprises the following steps: in response to a gantry motion intention, performing pre-checking on a field programmable logic controller before motion, collecting a plurality of discrete input quantities and absolute angle feedback, and generating a safety snapshot; if the safety snapshot meets a motion prohibition condition, the motion is rejected and the reason is output; if the prohibition condition is not triggered, a target gantry angle and a speed given value are written to the PLC, and an ascending edge pulse is applied to a position starting coil to trigger the motion. It is determined whether the gantry is in place, after the gantry is in place, a standardized gantry public interlocking signal set is output to a treatment control layer, and the gantry is controlled to enter a stable standby state, and the treatment control layer calculates a proton beam emission permission based on the interlocking signal set. Through the safety snapshot pre-checking, mixed angle determination and standardized interlocking output, the motion control safety and positioning accuracy of the gantry are improved.
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