X-ray source and X-ray generating method

Abstract

Provided is an X-ray source. The X-ray source comprises a control circuit, an ordinary light source, an optical module, a photocathode, an electron beam focusing structure, an anode target, an X-ray exit window, an ordinary light incidence window and a vacuum container, wherein the control circuit is used for controlling a working state of the ordinary light source, the ordinary light source is used for emitting light rays with a specific wave length range, the optical module is used for focusing the light rays emitted by the ordinary light source, the photocathode is used for generating electrons through optical excitation, the electron beam focusing structure is used for focusing electro beams generated by the photocathode, the anode target receives bombardment of accelerated electrons, and generates X-rays through bremsstrahlung, the X-ray exit window and the ordinary light incidence window are arranged on the vacuum container, and the vacuum container is used for packaging the photocathode, the electron beam focusing structure and the anode target. The X-ray source has the advantages of being high in time resolution, programmable, capable of achieving impulse type emission, changeable in size and shape of an emission area, capable of enabling a high voltage to be easily connected, low in difficulty of connection, capable of enabling heat dissipation of the anode target to be easy, and relatively simple in structure. The invention further provides an X-ray generating method.

Description

【Technical field】 [0001] The invention relates to an X-ray source, in particular to an X-ray source and an X-ray generation method used in medical / industrial CT systems and micro-CT. 【Background technique】 [0002] X-ray imaging technology, which uses the property that X-rays can penetrate matter and attenuates according to the amount of penetrating matter, realizes non-destructive imaging of the internal structure of objects by detecting the attenuation degree of X-rays, which includes X-ray photography technology ( Radiography) and X-ray computed tomography (Computed Tomography, CT). Among them, CT technology is an imaging technology that obtains cross-sectional information of an object by performing ray projection measurements on the object at different angles of view. The CT system includes the main components such as the X-ray source, the X-ray detector, and the frame. The X-ray source is used as the X-ray generating device and is one of the key core components of the ...

AI Technical Summary

Problems solved by technology

The X-ray source can overcome the shortcomings of the traditional X-ray source, such as the limited time resolution and the inability to perform programmable and pulsed X-ray emission; at the same time, it also overcomes the uncontrollable size and shape of the cathode emission area of ​​the field emission X-ray source. It is difficult to connect, the anode target is not easy to dissipate heat, and the structure is relatively complicated.

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