Linear array micro-nano focus X-ray source for micro-nano CT (computer tomography) system

Abstract

The linear array micro-nano focus X-ray source for a micro-nano CT system. The linear array micro-nano focus X-ray source for the micro-nano CT system comprises cathodes 2, grids 3, anodes 4, focusing electrodes 5, magnetic solenoids 7, deflecting electrodes 8 and a target 9; the cathodes are used for producing electrons, the anodes are used for electron acceleration, the grids are arranged between the anodes and the cathodes and used for adjusting beam intensity of electron emitted by the cathodes, the focusing electrodes are used for completing first-time focusing of accelerated electrons, the magnetic solenoids are used for completing second-time focusing of the electrons, and the deflecting electrodes are used for controlling the position that the electrons hit on the target. By means of the linear array micro-nano focus X-ray source for the micro-nano CT system, static CT scanning can be achieved, namely, a radiation source, an object to be detected and a detector are all in a static state, electron beam scanning substitutes for mechanical scanning, thus error caused by mechanical scanning can be avoided, small external disturbance, small size, light weight and fast detection speed can be obtained, and linear array micro-nano focus X-ray source for the micro-nano CT system can be applied to CT systems of different types.

Description

technical field [0001] The invention relates to a line array micro-nano focus X-ray source device, in particular to a line array micro-nano focus X-ray source for a micro-nano CT system Background technique [0002] The traditional micro-focus X-ray source generally has only one focal point. For the micro-nano-microsecond level fast dynamic digital imaging detection system required in the fields of biology and medicine, the performance of the traditional micro-focus X-ray source cannot meet its requirements. At present, the micro-focus X-ray source generally has only one focal point. When it is used in a micro-nano CT system, it has the following disadvantages: the scanning of all X-ray projections required for the high-resolution reconstruction of a general micro-nano CT system usually lasts for many Therefore, a large amount of heat will be generated at the same position of the target layer, which may cause the metal target to melt or even be burned; secondly, the micro-fo...

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Problems solved by technology

[0002] The traditional micro-focus X-ray source generally has only one focal point. For the micro-nano-microsecond fast dynamic digital imaging detection system required in the fields of biology and medicine, the performance of the traditional micro-focus X-ray source cannot meet its requirements.

At present, the micro-focus X-ray source generally has only one focal point. When it is used in a micro-nano CT system, it has the following disadvantages: the scanning of all X-ray projections required for the high-resolution reconstruction of a general micro-nano CT system usually lasts for many Therefore, a large amount of heat will be generated at the same position of the target layer, which may cause the metal target to melt or even be burned; secondly, the micro-focus CT system with one focus uses mechanical scanning, which will inevitably introduce mechanical errors and affect CT System resolution and other performance indicators

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