Patient guide positioning and target area displacement real-time monitoring and correcting system and method

Abstract

The invention relates to a patient guide positioning and target area displacement real-time monitoring and and correcting system and method. The method is characterized by comprising the following steps of 1) building a patient guide positioning and target area displacement real-time monitoring and correcting system in a simulation room and a treatment room of a heavy ion treatment device, and acquiring patient tumor target area calibration data under a treatment isocentric coordinate system in the simulation room; 2) guiding the patient to perform positioning and positioning verification according to the acquired calibration data of the tumor target area of the patient under the isocentric coordinate system of the treatment room; and 3) monitoring the displacement of the tumor target areaof the patient in real time, and correcting the position of the tumor target area of the patient on line according to the real-time monitoring result of the displacement of the tumor target area of the patient and a preset threshold. The method can be widely applied to the field of heavy ion treatment.

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...

AI Technical Summary

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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