Publicaties
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A novel X-ray radiography approach for the characterization of granular activated carbons used in the rum production Universiteit Hasselt
Background: X-ray methods have proven to be reliable, accurate and sensitive techniques to study activated carbons in order to define its porous structure and functionality groups. Methods: For the first time, the characterization of the exhaustion level of granular activated carbon (GAC) used in rum production applying methods based on X-ray technology has been explored. In this work, the exhaustion degree of GAC from a target rum "filter" ...
Probing salt crystallization damage mechanisms in porous limestone with neutron radiography and X-ray tomography Universiteit Gent
This article presents a comprehensive study on saline transport, pore filling due to salt crystallization and resulting salt damage in Savonnières limestone. The results were achieved by combining neutron radiography - for transport imaging - and X-ray micro-tomography - for pore structure and fracture visualization U+2013 applied to samples subjected to repeated wetting-drying cycles. We studied capillary uptake and drying of water, 1.4m sodium ...
X-ray radiography to visualize the rebar-cementitious matrix interface and judge the delay in corrosion through self-repair by encapsulated polyurethane Universiteit Gent
Characterizing saline uptake and salt distributions in porous limestone with neutron radiography and X-ray micro-tomography Universiteit Gent
High spectral and spatial resolution X-ray transmission radiography and tomography Universiteit Gent
In high-resolution radiography and tomography, the local intensity of the X-ray beam is typically measured using an energy-integrating detector system, thus discarding all information on the detected X-ray spectrum. Recently, several direct or hybrid detector systems have been developed which allow for single photon counting using one or more energy thresholds [1]. By measuring the same object at different energy thresholds, it becomes possible ...
Possibilities of energy-resolved X-ray radiography for the investigation of paintings Universiteit Antwerpen
X-ray radiographic images of paintings often show little or no contrast. In order to increase the contrast in radiographic images we measured the X-ray spectrum of a low power X-ray tube, after passing through the painting, with a high energy-resolution SDD detector. To obtain images, the detector is collimated with a 400 mu m diameter pinhole and the painting was moved through the beam in the x and y-direction using a dwell time of a few ...
Obtaining optimum exposure conditions for digital X-ray radiography of fresh nuclear fuel rods Universiteit Antwerpen
X-ray radiography is widely used as a non-destructive method for defect detection and quality checks of nuclear fuel rod’s components in the fabrication process. In this paper, an approach based on Monte Carlo method is proposed to obtain optimum filter and exposure parameters such tube voltage, current and exposure for digital radiography of a nuclear fuel rod including UO2 pellets with a maximum diameter of 11.9 mm. Monte Carlo N-Particle ...
A novel method for predicting pixel value distribution non-uniformity due to heel effect of X-ray tube in industrial digital radiography using artificial neural network Universiteit Antwerpen
The heel effect in X-ray radiation imaging systems causes a non-uniform radiation distribution on the imaging plane. In this research, a novel method was developed for predicting the pixel value’s non-uniformity due to the heel effect of X-ray tube on the imaging plane using Monte Carlo N particle (MCNP) simulation code and artificial neural network (ANN). At first, an industrial X-ray tube and a computed radiography (CR) image plate were ...