Radiation therapy device capable of freely combining radiation beams

Abstract

The invention relates to a radiation therapy device capable of freely combining radiation beams. A plurality of radiation source groups are arranged on a source carrier; each radiation source group comprises a plurality of radiation sources; each radiation source group corresponds to one collimation unit; each collimation unit can independently move to select one collimation hole group or shielding group; and the collimation unit selects one collimation hole group to connect a pre-collimation channel, so that a plurality of radiation beams formed by rays emitted by a plurality of radiation sources of one radiation source group are converged on a common focus, or the collimation unit selects the shielding group to shield the rays emitted by the corresponding radiation source group. The radiation therapy device has the advantages that each radiation source group on the source carrier is provided with one collimation unit used for switching on or off radiation beams and selecting variouscollimation channels; tens of thousands of target spots with different dose field distributions are realized in a position of the common focus; the problem of current situation that only limited different dose field distribution can be realized at present is solved; the conformal and intensity modulation radiation therapy of irregular focuses can be comprehensively met; and the accuracy, the precision and the therapy efficiency of the radiation therapy are improved.

Description

technical field [0001] The invention relates to a radiotherapy device in the technical field of large medical equipment, in particular to a radiotherapy device with beams freely combined. Background technique [0002] Tumor is a common and frequently-occurring disease. With the development of science and technology, radiation therapy has become an important means of tumor medical treatment. In the radiation therapy industry, the technology of using Go-60 radiation source for focused radiation therapy has been quite mature. Stereotactic Gamma The Ma-ray therapy system (hereinafter referred to as Gamma Knife) is a radiotherapy device that uses stereotactic multi-source focused radiotherapy to emit and focus Gamma rays on a treatment target of the tumor, and treat the tumor at the treatment target. cell killing. However, when encountering a tumor with a complex shape, the so-called conformal intensity-modulated therapy is required, that is, the shape of the radiation field in ...

AI Technical Summary

Problems solved by technology

The radiation source of the device is concentrated in a fixed area of ​​the source body, although there are at least one set of through holes on the intermediate collimator, at least one set of through holes in the high latitude area or at least one set of through holes in the low latitude area, but The number of groups is limited by the physical space on the intermediate collimator, so it cannot be too many, so the combination of radiation fields is also limited, and the dynamic conformity of the strange dose field of tumors cannot be fully realized.

And the change of its combination is realized by the number of through-hole groups of the intermediate collimator and the relative movement (rotation) of the final collimator and the source body, and the conversion time of the combination is long and the precision is low

Images