Annular addressable cold cathode X-ray source device and preparation method and application thereof

Abstract

The invention discloses an annular addressable cold cathode X-ray source device which comprises an annular or polygonal anode and a cathode, the anode comprises an anode substrate and a transmission target film, and the cathode comprises a cathode substrate, a cathode electrode, an insulating layer, a gate electrode and a plurality of low-dimensional nano cold cathodes; the cathode substrate, the cathode electrode, the insulating layer and the gate electrode are arranged on the inner wall of the cathode substrate, and the insulating layer is arranged between the cathode electrode and the gate electrode; the low-dimensional nano cold cathode is arranged on the cathode electrode; the transmission target film is arranged on the outer wall of the anode substrate; and a plurality of isolation pieces for insulation are also arranged between the anode and the cathode. The annular addressable cold cathode X-ray source device can irradiate an object in all directions and all angles without a mechanical rotating structure, and the problems that an existing discrete X-ray tube array is low in imaging precision and complex in control system, and a flat plate X-ray source is limited in imaging angle are solved.

Description

technical field [0001] The present invention relates to the technical field of X-ray sources, and more specifically, to an annular addressable cold-cathode X-ray source device and its preparation method and application. Background technique [0002] X-ray CT imaging has important applications in scientific research, industrial inspection, medical treatment and other fields. Common X-ray CT imaging equipment uses a hot cathode X-ray tube as a light source, so complex mechanical structures are required to irradiate the light source to different parts of the human body. Due to the advantages of faster response time, smaller size and lower energy consumption, cold cathode X-ray sources are used as light sources in X-ray CT imaging, which can reduce the complexity of the mechanical structure of the equipment and reduce its volume. [0003] Cold cathode X-ray sources can generally be divided into two types: X-ray tubes and flat-panel X-ray sources. There have been reports on the...

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Problems solved by technology

[0004] In recent years, although there have been related technologies of flat-plate cold-cathode X-ray sources with addressable functions, such as the Chinese invention patent with the publication number CN109256310A, however, the above-mentioned prior art is generally prepared on a flat substrate because of flat-plate cold-cathode X-ray sources. Therefore, it is difficult to irradiate objects from all angles and all directions without the help of a rotatable mechanical structure, so it is still difficult to apply to CT imaging

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