Radiation therapy device

Abstract

The invention relates to a radiation therapy device, which comprises a shielding body, a source body and an alignment body which are arranged on the shielding body, a plurality of radioactive sources are loaded in the source body, a beam channel is arranged in the alignment body, the radioactive sources are focused on a common focus through the beam channel, the alignment bodies are more than one, which can relatively move, at least a group of through holes are arranged in the alignment bodies, the distributions of the through holes are the same with that of the radioactive sources in the source body, at least a group of through holes are arranged in an area with high latitude of the alignment bodies, at least a group of through holes are arranged in an area with low latitude in the alignment bodies. The end parts of the alignment bodies are ring-shaped curved bodies, and the alignment bodies are respectively connected with a power actuating mechanism, and the alignment bodies relatively rotate and move. Radiation irradiation can be automatically combined according to the need of a method of treatment in the process of treating, dynamic conformity of dose fields are achieved, the auxiliary time of radiation therapy is shortened, and the efficiency of 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 The dose field of the shape, the dose field is not easy to conform to the shape of the irregular lesion, it is difficult to realize the protection of the endangered organs during the treatment process, and affect the accuracy of radiation therapy; the helmet of the device is connected The body is docked as a whole, and it is the follower of the pre-collimation body, which cannot rotate independently. When the patient needs focused irradiation of rays with different apertures, he must stop the machine and change the docking position of the helmet manually. During the treatment process, the dose cannot be automatically achieved. The dynamic conformity of the field prolongs the auxiliary time of radiation therapy and reduces the efficiency of treatment work

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