A system and method for real-time monitoring and correction of patient-guided positioning and target displacement

Abstract

The invention relates to a system and method for real-time monitoring and correction of patient-guided positioning and target area displacement, which is characterized in that it comprises the following steps: 1) setting up patient-guided positioning and target area displacement in a simulation room and a treatment room of a heavy ion therapy device Monitor and correct the system in real time, and obtain the calibration data of the patient's tumor target area in the treatment isocenter coordinate system in the simulation room; 2) guide the patient to perform positioning according to the acquired calibration data of the patient's tumor target area in the treatment room isocenter coordinate system 3) Real-time monitoring of the displacement of the patient's tumor target area, and online correction of the position of the patient's tumor target area according to the real-time monitoring results of the patient's tumor target area displacement and the preset threshold. The invention can be widely used in the field of heavy ion therapy.

Description

technical field [0001] The invention relates to the technical field of heavy ion radiotherapy, in particular to a system and method for guiding patient positioning and real-time monitoring and correction of tumor target area displacement during heavy ion beam radiotherapy. Background technique [0002] Heavy ion radiotherapy is different from traditional photon radiotherapy because heavy ion beams have unique physical and biological effects, making heavy ion beams more advantageous in the treatment of malignant tumors. The Bragg peak of the heavy ion beam can control the beam current to release the maximum dose at the tumor tissue, avoiding the patient's normal tissue receiving excessive doses and inducing new lesions, so the positioning requirements for the patient during heavy ion beam radiotherapy are more conventional Radiation therapy is also more stringent. Before heavy ion beam radiotherapy, doctors need to diagnose the specific location of the tumor according to the...

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Problems solved by technology

[0008] In view of the above-mentioned problems of low patient positioning efficiency and positioning accuracy in heavy ion radiotherapy, the purpose of the present invention is to provide a system for guiding patient positioning and real-time monitoring and correction of tumor target area displacement in heavy ion beam radiotherapy and Methods: By combining the dual-camera photogrammetry system with the high-precision three-dimensional control network of the laser tracker arranged in the treatment room, the patient is guided to the positioning before each radiotherapy, so that the efficiency and accuracy of the patient positioning are improved; during the radiotherapy process Real-time monitoring of the position parameters of the patient's tumor target area, and real-time online correction and position compensation according to the position deviation from the treatment isocenter; with the aid of the calibration data of the patient in the expiratory and inspiratory states during the initial positioning, Carry out real-time displacement monitoring of the target area during the treatment of patients, radiologists can correct the position deviation of the tumor target area according to the target area displacement monitoring data, and improve the reliability and safety of the treatment process

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