electron linear accelerator

Abstract

The invention provides an electronic linear accelerator, which comprises an electron beam emitting device used for emitting a kV-level electron beam or an mV-level electron beam, a magnetic deflection system, a therapeutic target and an imaging target. The mV-level electron beam can enter the magnetic deflection system and then shoots out of the magnetic deflection system after being deflected in the magnetic deflection system. The therapeutic target is used for receiving the mV-level electron beam shot out of the magnetic deflection system. The mV-level electron beam bombards the therapeutic target to generate therapeutic rays. The imaging target is positioned between the electron beam emitting device and the magnetic deflection system and is used for receiving the kV-level electron beam. The kV-level electron beam bombards the imaging target to generate imaging rays. According to the technical scheme of the electronic linear accelerator, the design limitation of an existing homologous double-beam linear accelerator due to the existence of a deflection magnet is broken through. The kV-level electron beam will not enter the magnetic deflection system to be deflected, while the kV-level electron beam directly bombards the imaging target to generate imaging rays. The energy of the imaging rays can meet the imaging requirement, so that the utilization efficiency of the kV-level electron beam is improved. Therefore, formed images are high in quality. Meanwhile, the irradiation part can be accurately positioned and the setup error is lowered.

Description

technical field [0001] The invention relates to the field of medical equipment, in particular to an electron linear accelerator. Background technique [0002] With the development of precise radiation therapy technology, image-guided radiation therapy (Image Guide Radiation Therapy, IGRT) technology is gradually being applied clinically. Using IGRT technology, on the one hand, before the patient receives treatment, imaging can be used to verify the irradiation position of the patient. After the irradiation position is confirmed, the therapeutic irradiation can be performed to reduce the positioning error. On the other hand, during the treatment process, the changes of the tumor can be tracked in real time, and the treatment conditions can be adjusted according to the change of the tumor position so that the irradiation field closely "follows" the target area to achieve precise treatment. [0003] Since the radiation used for treatment is usually MV-level energy X-rays, but ...

AI Technical Summary

Problems solved by technology

[0006] The problem solved by the present invention is that the loss of the electron beam after the KV-class electron beam of the existing homologous double-beam electron linear accelerator passes through the deflection magnet is large, resulting in a decrease in the definition of the imaging image, and the treatment ray cannot be accurately positioned according to the image with low definition In the end, the precise treatment cannot be completed

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