Vertical adaptive radiotherapy system and method

Abstract

The invention relates to a vertical adaptive radiotherapy system, which comprises an imitative positioning device, a treatment plan design device and a vertical treatment device, wherein the imitativepositioning device comprises one or more medical image devices and is used for collecting patient positioning images of patients in horizontal or other body positions; the treatment plan design device comprises an image registration module, an image density setting module, a region of interest definition module, an optimized parameter setting module and a dose calculation module; and the verticaltreatment device comprises a vertical positioning module, a vertical imaging module and a beam treatment module, and is used for carrying out body position fixing, online image acquisition and radiotherapy on a patient in a standing or sitting posture. The invention also relates to a vertical adaptive radiotherapy method. According to the invention, dose deviations caused by inconsistent body positions of a patient during imitative positioning and treatment and changes of anatomical structures in and among several times are fully considered, which is of great significance to improvement of the curative effect of a patient.

Description

technical field [0001] The invention relates to a vertical adaptive radiotherapy system and method, belonging to the field of medical technology. Background technique [0002] For radiotherapy for patients standing, sitting or other postures, such as using the treatment device introduced in Chinese patent 201921379096.1 for radiotherapy, it is necessary to simulate positioning and design an offline radiotherapy plan before radiotherapy, but when simulating positioning, the patient's position is generally in the Horizontal posture, so the offline radiotherapy plan is also designed based on the horizontal posture of the patient, and the dose distribution of the region of interest in the plan is also obtained under the horizontal posture. When the above-mentioned patients undergo radiotherapy, because their body posture and positioning are inconsistent, posture changes will lead to significant changes in the position and shape of internal organs (compared to positioning). If th...

AI Technical Summary

Problems solved by technology

When the body positions are different, the coordinate systems of the reference image and the target image are inconsistent, and the two images in the above method cannot be directly fused and registered; if the target image is not a CT image, the image density needs to be set, which is not mentioned in the above method; The beam optimization based on the two-dimensional deformation field mentioned in the method, for patients with large changes in the target area, the dose distribution will be relatively poor, which may not meet the clinical requirements

Therefore, the above method is only applicable to the situation where the positioning and treatment are in the same body position, the degree of deformation of the target area is small, and the target image is CT. It is not applicable when the body position is different, the degree of deformation of the target area is large, or the target image is not CT.

Images