Multi-collimating body radiation therapy device

Abstract

The invention relates to a radiation therapy device of a multi-alignment body which comprises a shield, and a source body and a final alignment body which are arranged on the shield, wherein a plurality of radioactive sources are loaded in the source body, at least one middle alignment body is arranged between the source body and the final alignment body, the source body, the middle alignment bodyand the final alignment body are respectively connected with a gear power transmission mechanism, which can independently rotate relative to the same rotary center line, the final alignment body comprises various groups of through holes with different diameters, the middle alignment body comprises at least one group of though hole, at least one group of through hole in high-latitude regions and at least one group of through hole in low-latitude regions. In the process of treatment, the invention can automatically combine radiation beam according to the need of treatment proposal, the dynamicconformity of a dose field is realized, the auxiliary time of the radiation therapy is shortened, and the efficiency of the radiation therapy is improved.

Description

technical field [0001] The invention relates to a radiotherapy device, in particular to a radiotherapy device for gamma rays. Background technique [0002] At present, radiation therapy adopts the working principle of rotating focus to rotate and irradiate the patient's lesion, and optimize the treatment plan according to the shape and position of the lesion in the patient's body, and select radiation beams with different diameters to meet the requirements of conformal therapy; During the treatment process, according to the treatment plan, by changing the collimator of different specifications, the diameter of the radiation beam is changed, so as to form focus targets with different focus sizes, so that the lesion tissue at the rotating focus point receives the maximum dose of conformal irradiation, Healthy tissue is irradiated with instantaneous and tolerated dose, so as to kill the lesion, protect the healthy tissue around the lesion, and achieve the purpose of radiation t...

AI Technical Summary

Problems solved by technology

Since there is a group of through holes on the pre-collimator of the device and multiple groups of through holes on the helmet, they are distributed in the same pattern as the radioactive source, and the rays of the radioactive source are focused on a common focus through a group of through holes, forming a Shaped dose field, the dose field is not easy to conform to the shape of irregular lesions, and it is difficult to realize the protection of endangered organs during treatment, which affects the accuracy and precision of radiation therapy; the helmet of the device is connected to the treatment bed, and is connected with The pre-collimation body is docked as a whole. It is the follower of the pre-collimation body and cannot rotate independently. When the patient needs to focus radiation with rays of different apertures, he must stop the machine and manually change the docking position of the helmet. During the treatment, he cannot Automatically realize the dynamic conformity of the dose field, which prolongs the auxiliary time of radiotherapy and reduces the efficiency of treatment work

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