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Digital X-ray photography system based on attenuating plate

An imaging system and X-ray technology, applied in the fields of radiological diagnostic equipment, medical science, diagnosis, etc., can solve problems such as the difficulty of calculating scattered rays, and achieve the effect of uniform material and strong penetrating ability

Pending Publication Date: 2017-05-10
ZHANGJIAGANG MEDICAL INSTR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is very difficult to accurately calculate the scattered rays without sufficient information about the imaging target

Method used

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  • Digital X-ray photography system based on attenuating plate
  • Digital X-ray photography system based on attenuating plate
  • Digital X-ray photography system based on attenuating plate

Examples

Experimental program
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Effect test

Embodiment 1

[0014] The invention discloses a digital X-ray photography system based on an attenuation plate. The imaging system is composed of an imaging device and image processing software. The imaging device includes a frame and an x-ray source (101), an attenuation plate (103) and a flat panel detector (104) fixed on the frame. The X-rays emitted by the X-ray source (101) pass through the imaging target (102) and the attenuation plate (103) and are imaged on the flat panel detector (104) (see figure 1 ). An attenuation plate (103) of uniform material is arranged between the imaging target (102) and the flat panel detector (104), and the attenuation plate has no gaps or holes. For a 100KeV X light source, the attenuation plate (103) is a material with uniform water equivalent density, and the thickness is 3cm.

[0015] Because the shape of the attenuation plate is regular, the material is uniform, and the distance between the attenuation plate and the flat panel detector is fixed. T...

Embodiment 2

[0017] In this embodiment, the hardware part is the same as Embodiment 1 except the attenuation plate (see figure 2 ). The attenuation plate (201) in this embodiment is a uniform water-equivalent density material, because the center of the image often has a larger proportion of scattered rays, so the surface of the attenuation plate is designed as an arc, with a greater thickness in the middle for better Good at blocking scattered rays. For a 100KeV X light source, the thickness of the edge of the attenuation plate is 1.1mm, and the thickness of the center is 1.3mm (see figure 2 Schematic diagram of the cross-section of the lower attenuation plate).

[0018] The scattering contribution matrix of a pencil beam chief ray on a flat panel detector is usually image 3 In the form on the left, A44 is the center of the pencil beam, which means that the scattering contribution of the pencil beam to all pixels (or pixels after downsampling) must be calculated, and the calculation ...

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Abstract

The invention discloses a digital X-ray photography system based on an attenuating plate. By arranging the attenuating plate between an imaging object and a flat panel detector, most scattered rays, from the imaging object, are sheltered, and meanwhile, sufficient main rays are permitted. By calculating the scattered rays, in a projected image, from the attenuating plate and by removing the scattered rays from the projected image, interference caused by the scattered rays is reduced.

Description

technical field [0001] Digital radiography. Background technique [0002] At present, digital X-ray photography system has been used in more and more hospitals. However, when digital X-ray photography is imaging, the scattered rays generated by the rays passing through the imaging target reduce the image quality. At present, the method of removing scattered rays includes grid and anti-scattering software post-processing technology. [0003] The grid is to add a grid of lead strips parallel to the ray direction between the imaging target and the detector, so as to filter out scattered rays and improve the image quality, but at the same time, the grid will also leave a shadow of lead strips on the projected image. [0004] Anti-scattering software post-processing technology is to use software technology to calculate and separate the scattered ray components in the projected image after obtaining the projected image, so as to improve the image quality. However, it is very di...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B6/00
CPCA61B6/00A61B6/4035A61B6/483
Inventor 虞刚李宝生梁月强
Owner ZHANGJIAGANG MEDICAL INSTR CO LTD
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