Novel stereotactic radiotherapy system

Abstract

The invention discloses a novel stereotactic radiotherapy system. The range of the incident angle of rays is enlarged, the focus-skin ratio and the dosage rate of a focal point are increased, weight loads of the two sides of a machine head are balanced, in this way, the rotating precision of the machine head is improved, and equipment abrasion is reduced. In the adopted technical scheme, a rotating roller is arranged on a base and can move circumferentially on the base along with the own center axis, a rotating disc sleeves a tray and can automatically rotate under the effect of a driving mechanism of the rotating disc, two treatment head racks are symmetrically arranged on the rotating disc, treatment heads are movably arranged at the lower ends of the treatment head racks respectively and arranged on the treatment head racks through adjusting structures, the adjusting structures are used for ensuring that the rays of the treatment heads are always gathered at the intersecting position of the center axis of the rotating roller and the automatic-rotation axis of the rotating disc, and the included angle formed between the rays of the treatment heads and the automatic-rotation axisof the rotating disc can be adjusted. The novel stereotactic radiotherapy system can be widely applied to the field of radiotherapy.

Description

technical field [0001] The invention relates to a novel stereotactic radiotherapy system, which belongs to the technical field of radiotherapy. Background technique [0002] Radiation therapy (referred to as radiotherapy) is an important method of tumor treatment, and precision radiotherapy is an important development direction in the field of radiotherapy. Stereotactic radiotherapy (SRS / SBRT) is an important part of precision radiotherapy, including precise positioning of tumor targets and normal or crisis organs, and high-dose and less-fractionated irradiation techniques. The benefits of stereotactic radiation therapy are increasingly clinically demonstrated. According to RTOG clinical research data, it is estimated that in the next 10 years, the utilization rate of stereotactic radiotherapy technology in brain cancer will increase by 108%; the utilization rate in body tumors will increase by 144%. [0003] At present, the common methods to achieve stereotactic radiother...

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Problems solved by technology

[0005] After long-term practical application, it is found that the current gyro knife has the following shortcomings: 1. Because the gyro rotation angle of the treatment head is a fixed angle, the adjustable range of the irradiation path is small, and the incident angle cannot be adjusted according to actual clinical requirements; 2. Due to the rotation of the head The speed is constant. When the drum rotates faster, the step gap of the gyro rotation of the treatment head will be relatively large, which is not conducive to reducing the dose of surrounding normal tissues and improving the focal skin ratio; 3. The treatment head is installed on one side of the machine head , Because the treatment head uses high-density metals such as tungsten and uranium, the mass of the treatment head is very large, so the weight load on both sides of the head is unbalanced, the rotation accuracy of the head is insufficient, and the wear is large

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