X-ray device and CT device provided with same

Abstract

The invention discloses an external thermionic cathode distributed X-ray device. The X-ray device is provided with a vacuum box, multiple electron emission units, an anode and a power supply and control system, wherein the periphery of the vacuum box is sealed, the inside of the vacuum box is in a high vacuum state, the electron emission units are mutually independent and are arranged to form a linear array and installed on the side wall of the vacuum box, the anode is installed in the middle inside the vacuum box and is parallel to the arrangement lines of the electron emission units in the length direction, the anode and the installing plane for the electron emission units form a preset included angle in the width direction, and the power supply and control system is provided with a high-voltage power supply, a focusing power supply, an emission control device and a control system. Each electron emission unit is provided with a heating lamp filament, a cathode connected with the heating lamp filament, an insulation supporting part surrounding the cathode and the lamp filament, a focusing electrode located above the cathode and configured at the top end of the insulation supporting part and a connecting fixing part arranged above the focusing electrode and connected with the box wall of the vacuum box in a sealed mode, wherein a lamp filament lead penetrates through the insulation supporting part to be connected with the emission control device.

Description

technical field [0001] The present invention relates to a device for generating distributed X-rays, in particular to arranging a plurality of independent thermal cathode electron emission units in an external manner in an X-ray light source device and using grid control or cathode control to generate transformations in a predetermined order An external hot cathode distributed X-ray device for X-rays at the focal point and a CT device with the device. Background technique [0002] Generally speaking, an X-ray light source refers to equipment that generates X-rays, usually consisting of X-ray tubes, power supply and control systems, auxiliary devices such as cooling and shielding, etc., and its core is the X-ray tube. X-ray tubes usually consist of a cathode, an anode, and a glass or ceramic housing. The cathode is a direct-heated spiral tungsten wire. When it is working, it is heated to a high temperature state by passing an electric current to generate a thermally emitted e...

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Problems solved by technology

However, there are disadvantages such as complex production process, low emissivity and lifespan of carbon nanotubes

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