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X-ray optical grating imaging system

A grating imaging and X-ray technology, which is applied in the fields of radiological diagnostic instruments, medical science, diagnosis, etc., can solve the problems of low resolution, poor sensitivity, large error, etc., to overcome the limitations of high-energy X-rays and reduce processing The effect of reducing the cost and reducing the difficulty of production

Inactive Publication Date: 2016-01-13
SHENZHEN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] The purpose of the present invention is to provide an X-ray grating imaging system, which can effectively solve technical problems such as poor sensitivity, low resolution, large error, and high cost in the prior art.

Method used

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  • X-ray optical grating imaging system

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Embodiment 1

[0035] Such as figure 1 As shown, Embodiment 1 provides an X-ray grating imaging system, including an X-ray tube 1, an absorption grating 2, a sample stage 3, a phase grating 4, an X-ray grating fluorescence conversion screen 5 and a visible light detector Device 6; X-ray tube 1, absorption grating 2, sample stage 3, phase grating 4, X-ray grid fluorescence conversion screen 5 and visible light detector 6 are arranged in sequence according to the direction of X-ray propagation, and the above-mentioned devices are equipped with precision adjustment mechanisms, Make the X-ray generated by the X-ray tube 1 present the parallel linear structure direction, the absorption grating 2 structure direction, the phase grating 4 structure direction and the X-ray grid fluorescent conversion screen 5 structure direction and the visible light detector 6 to be in the same one-dimensional In space, the orientation of the periodic structure of each grating mechanism can be precisely adjusted, an...

Embodiment 2

[0049] Most of the technical solutions of Embodiment 2 are the same as those of Embodiment 1, and the difference is that in Embodiment 2, the material of the light-blocking layer 21 of the absorption grating is metal bismuth material; the material of the light-transmitting layer 22 of the absorption grating is silicon material. Compared with the gold material, the metal bismuth material has lower raw material cost and more convenient processing. Therefore, the cost of the absorption grating of the metal bismuth material is much lower than that of the gold material.

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Abstract

The invention provides an X-ray optical grating imaging system which comprises an X-ray pipe, an absorption light grating, a sample table, a phase light grating, an X-ray grid fluorescent conversion screen and a visible light detector. The X-ray grid fluorescent conversion screen comprises at least one light permeable layer for permeating X-rays, at least one waveguide layer wrapping the surface of the light permeable layer so that visible light can be completely reflected by the surface of the waveguide layer, and at least one fluorescent layer for converting the X-rays into visible light. The X-ray optical grating imaging system has the advantages that the combination of the X-ray grid fluorescent conversion screen and the visible light detector replaces an existing X-ray detector, system sensitivity is effectively improved, errors are reduced, the limit of high-energy X-rays is overcome, a bismuth material absorption light grating replaces an existing gold material absorption light grating, and the manufacturing difficulty and machining cost of the light gratings are reduced.

Description

technical field [0001] The invention relates to an optical device, in particular to an X-ray grating imaging system. Background technique [0002] Non-destructive imaging detection technology has a wide range of applications in medicine, life science, material science, industrial applications and security inspection, among which X-ray imaging is one of the most important methods. Traditional X-ray imaging is realized based on the absorption characteristics of X-rays by objects. It uses the different absorption of X-rays by different parts inside the object to form a contrast image. When X-rays are used to image weakly absorbing objects, that is, objects composed of light elements, since each part of the object absorbs very little input X-rays, the difference in absorption between them cannot form an absorption contrast that can be recognized by the detector. Absorption images with sufficient contrast could not be acquired. Especially in the fields of medicine and biology, ...

Claims

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Application Information

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IPC IPC(8): A61B6/00
Inventor 杜杨雷耀虎刘鑫黄建衡李冀郭金川牛憨笨
Owner SHENZHEN UNIV
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