A method and system for image-guided dynamic localization and correction of radiotherapy target area

By dynamically registering and matching the image-guided device with the 3D model and generating correction instructions, the problem of real-time deviation of the radiotherapy target area was solved, achieving high-precision target area positioning and correction, and improving the safety and accuracy of radiotherapy.

CN122164019APending Publication Date: 2026-06-09SHANDONG RES INST OF TUMOUR PREVENTION TREATMENT
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SHANDONG RES INST OF TUMOUR PREVENTION TREATMENT
Filing Date
2026-03-19
Publication Date
2026-06-09

AI Technical Summary

Technical Problem

Existing radiotherapy target localization technologies suffer from real-time deviations from the pre-planned target location, leading to the risk of off-target. Furthermore, existing image-guided methods lack robustness, making it difficult to balance positioning accuracy and real-time performance. In most cases, accuracy verification is delayed, and anomaly handling is not timely.

Method used

The system acquires dynamic image data of the target area in real time using image-guided equipment, registers and matches it with a 3D model, generates correction instructions, drives the radiotherapy equipment to dynamically position and correct itself, monitors the correction accuracy in real time, constructs a multi-scale feature pyramid, and combines the K-nearest neighbor algorithm and iterative optimization to achieve high-precision offset calculation and correction.

Benefits of technology

It achieves high precision in target localization and reliable calibration, ensuring that the target location accuracy meets clinical requirements, timely avoids radiotherapy risks, improves radiotherapy safety and accuracy, and generates structured data to support treatment plan optimization.

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Abstract

This invention discloses an image-guided method and system for dynamic positioning and correction of radiotherapy target areas, belonging to the field of medical technology. The invention includes an image acquisition module, a data processing module, an instruction generation module, an execution control module, an accuracy monitoring module, an anomaly handling module, and a data storage module. By combining voxel reconstruction algorithms with human anatomical parameters to construct a high-precision three-dimensional model of the target area, it maximizes the preservation of the target area's anatomical features and spatial morphology, eliminates image noise and general model bias, and effectively reduces positioning errors caused by the original data and model construction. By calculating the offset and transforming it into equipment-adaptive correction instructions through spatial coordinate transformation, it balances real-time performance and accuracy, resists interference from target area movement and equipment noise, and achieves precise adaptation and efficient execution of correction instructions. By real-time acquisition of corrected images to monitor positional accuracy, it ensures that the target area's positional accuracy always meets clinical requirements and promptly avoids radiotherapy risks.
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