Electron linear accelerator, beam limiter and lead blade driving device, driving parts

Abstract

The invention provides an electron linear accelerator, a beam limiting device, a lead blade driving device and a driving component. The lead blade driving component comprises a mounting seat, a lead screw and a nut. The lead screw is connected with a power source, the nut is screwed with the lead screw, and the mounting seat is fixedly connected with one of lead blades of the beam limiting device, is axially fixed to the nut and is peripherally rotatably connected with the nut, so that the lead blade can be driven to axially move along the lead screw. The lead blade driving device is used for driving every two lead blades on the same layer to move and comprises lead blade driving components. The lead blade driving components are respectively connected with the two corresponding lead blades and can respectively drive the corresponding lead blades to independently move, so that the two lead blades can approach each other or can be separated from each other, and fields between the two lead blades can be adjusted; each lead blade driving component of the lead blade driving device is the lead blade driving component. The electron linear accelerator, the beam limiting device, the lead blade driving device and the driving component have the advantages that the various lead blades can be independently driven, the regular or irregular fields can be formed by the lead blades under the control and are effectively matched with the shapes of infection focuses, and accordingly radiation injury to healthy portions of patients due to beams can be reduced.

Description

technical field [0001] The invention relates to the technical field of medical diagnosis and treatment equipment, in particular to a beam limiter and its lead blade driving device, a lead blade drive part, and an electron linear accelerator with the beam limiter. Background technique [0002] With the continuous increase and improvement of the functions of the electronic linear accelerator, the entire electronic linear accelerator system needs to be equipped with a tube and a beam limiter similar to that on X-ray diagnostic equipment when configuring EPID (Electronic Portal Imaging Device, Electronic Portal Imaging Device) . [0003] The working principle of the medical linear accelerator equipped with a beam limiter is as follows: when the generated X-ray beam passes through the regular field formed by the beam limiter device and is projected onto the lesion of the patient's body, the energy generated by the X-ray beam on the electronic flat panel The information is conver...

AI Technical Summary

Problems solved by technology

If the existing beam limiter is used, and the field of view of the beam limiter is expanded at the same distance to examine different lesions of the patient, since the radiation area is relatively large, it is easy to cause the patient's lesions to receive a larger dose of X-ray beams; It also exposes the patient's healthy parts to damage from the extra X-ray beams and other immeasurable consequences

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