Imitative positioning method for radiation treatment radiation field

Abstract

The invention relates to an imitative positioning method for a radiation treatment radiation field. The method comprises the following steps of: (1) forming a patient imitation positioning treatment body position on a positioning bed in an imitation positioning machine; (2) acquiring a radiation treatment radiation field image; (3) drawing a radiation treatment target region shape by using the radiation treatment radiation field image acquired with an imitation positioning machine image work station; (4) proportionally zooming the radiation treatment target region shape; (5) making the zoomed radiation treatment target region shape appear in the display visual field of a video camera, and displaying in real time by using an indoor display of the imitation positioning machine; and (6) drawing a radiation treatment target region shape at a human body radiation treatment position with a drawing pen while observing the radiation treatment target region shape according to the radiation treatment target region shape in the visual field window of a real-time display video camera of the indoor display of the imitation positioning machine and a skin radiation treatment position to obtain a body surface drawing radiation treatment target region shape; and (7) sticking a lead wire according to the body surface drawing radiation treatment target region shape and shooting a radiation field verification image. According to the imitative positioning method, the working efficiency of radiation treatment imitation can be increased, the radiation dosage of a patient is decreased greatly, and discomfort and even hurt to a patient is not caused.

Description

technical field [0001] The invention relates to the field of radiotherapy, in particular to a method for simulating and positioning radiotherapy radiation fields. Background technique [0002] In the two-dimensional radiotherapy irradiation, the position and range of the radiotherapy field are defined by parallel steel wires, and the outline of the radiotherapy field is delineated by simulating the shadow formed by the field lamp of the positioning machine on the well-shaped steel wire. However, the well-shaped steel wire is a rectangular structure. When it is used to delineate the skin projection of the radiotherapy field outline, it can only delineate the line segment of the field range. At the same time, the shape of the tumor is often irregular. In order to protect the normal organs around the tumor from After being irradiated, the outline of the radiotherapy field determined by the doctor is often not a straight line, but an irregular shape. In order to solve this prob...

AI Technical Summary

Problems solved by technology

In order to solve this problem, Chinese hospitals generally use lead wires and well-shaped steel wires on the patient’s skin surface to draw. It is a long-term radiographic radiation, which is not conducive to the radiation protection of patients

[0003] In order to overcome the above-mentioned problems and shortcomings, Holland Nuclear Communication Co., Ltd. adopts a liquid crystal projection method, that is, an independent monochrome liquid crystal projection board is attached to the head of the simulation positioning machine, and the outline of the radiotherapy field after the perspective image is drawn is displayed on the liquid crystal projection board. , and then use the field lamp of the simulation positioning machine as the projection light source to project the radiotherapy field outline displayed on the LCD screen, and then carry out the field outline according to the projected shadow of the radiotherapy field on the patient's body surface, so the method does not affect the simulation positioning The internal optical system of the machine head was modified. In addition, due to the low light transmittance of the transmissive LCD screen, the projection of the radiotherapy field contour projection was unclear; the US Patent No. 37865 improved the field projection delineation method of the Netherlands Nuclear Communication Company. Reflective projection technology (LCOS projection) is used to delineate the field of view, which improves the projection brightness of the field, but it has the problems of large changes and transformations inside the head of the analog positioning machine, complex structure, high thermal effect, and glare of light during face positioning; China's ZL200920144361.8 patent uses laser projection field delineation technology, which also solves the problem of unclear display of field contour projection and projection blur, but it still does not solve the problem of glare in face positioning, especially when laser energy is used improperly. risk of blindness