Design and testing of an anti-scattering grid for medium-energy X-ray flash radiography

Liu, W.J.; Fan, Chengcheng

doi:10.1016/j.apradiso.2015.09.003

Cited by 5 publications

(1 citation statement)

References 15 publications

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“…The X-ray imaging technique is widely used in a variety of applications such as medical diagnostics, nondestructive testing, airport security, and industry computed tomography. [1][2][3][4] It is based on the ability of X-rays or γ-rays to pass through metal and other materials opaque to ordinary light and produce photographic records by the transmitted radiant energy. Because different materials absorb either X-ray or γ-rays to different extents, penetrated rays show variations in intensity on a detector.…”

Section: Introductionmentioning

confidence: 99%

Visualization method for radiographic films through silver intensity mapping using X‐ray fluorescence

et al. 2017

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Radiographic films have a large range of applications. In many of these applications, the behavior of characteristic curves is very important for assessing the image quality and radiography setup. Radiographic film digitization and visualization are always performed by light transmission, and the characteristic curve is known as a behavior of optical density as a function of the radiation exposure. Because optical density is a function of metallic silver generated by chemical development in silver halides, when an image is visualized by light transmission, a silver amount map is indirectly seen. However, this measurement is limited by the optical instrument, and a very weak light signal cannot be distinguished from background light or background noise. In this way, highly exposed films can contain areas with different silver concentrations, but this cannot be seen because the optical density measurement is limited. One of the ways through which it is possible to overcome such limitation is to use a different method for ascertaining the quantity of silver remaining on the developed films, and one of the quantitative techniques that suit this purpose is X-ray fluorescence (XRF). The purpose of this paper is applying μ-XRF so as to obtain a point-by-point silver intensity map to detect objects with low optical contrast on conventional radiographic films. The results of this work have shown a higher linear range in measurement using XRF, and as consequence, small objects and details in low-contrast or overexposed radiographic images could be visualized by the silver mapping technique, and the same results could not be achieved using light transmission methods. A first approach about spatial resolution and contrast was made showing strong and weak points of this way to scan radiographic films.

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Section: Introductionmentioning

confidence: 99%

Visualization method for radiographic films through silver intensity mapping using X‐ray fluorescence

et al. 2017

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Molten pool behaviors and printability of tungsten anti-scattering grids with extremely thin wall thickness fabricated via laser powder bed fusion

Wang,

Han,

Jiang

et al. 2024

Additive Manufacturing

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A sub-megavolt anti-scattering grid: Fabrication, testing, and Monte Carlo simulation

Liu

Chen

Jing

et al. 2018

Review of Scientific Instruments

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X-ray flash radiography is an effective diagnostic in implosive research. While scattering reduces the contrast of radiography, the anti-scattering grids can effectively intercept the scattered radiation and acquire better images. A focused sub-megavolt grid is elaborately manufactured with the combination of lithography, etching, and laser drilling. The consistency of Monte Carlo simulations and radiographic experiments suggests a transmission of about 36% and a 1000 times improvement for the signal to scatter ratio of the grid.

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Design and testing of an anti-scattering grid for medium-energy X-ray flash radiography

Cited by 5 publications

References 15 publications

Visualization method for radiographic films through silver intensity mapping using X‐ray fluorescence

Visualization method for radiographic films through silver intensity mapping using X‐ray fluorescence

Molten pool behaviors and printability of tungsten anti-scattering grids with extremely thin wall thickness fabricated via laser powder bed fusion

A sub-megavolt anti-scattering grid: Fabrication, testing, and Monte Carlo simulation

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