Publications
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Characterizing salt transport and crystallization damage in porous limestone with neutron radiography and X-ray micro-tomography Ghent University
Translation from murine to human lung imaging using x-ray dark field radiography: A simulation study KU Leuven
Recent studies on murine models have demonstrated the potential of dark field (DF) x-ray imaging for lung diseases. The alveolar microstructure causes small angle scattering, which is visualised in DF images. Whether DF imaging works for human lungs is not a priori guaranteed as human alveoli are larger and system settings for murine imaging will probably have to be adapted. This work examines the potential of translating DF imaging to human ...
Improved radiographic methods for the investigation of paintings using laboratory and synchrotron X-ray sources University of Antwerp
It is generally known that radiographic inspection of 1517th century paintings can easily be done with a polychromatic X-ray source using a voltage between 20 kV and 40 kV in combination with classic X-ray films. Unfortunately, the spatial structure of numerous 19th and early 20th century paintings cannot be visualized with conventional radiography due to several reasons such as the use of lead white grounds or low absorbing pigments. ...
Simulation of a complete X-ray digital radiographic system for industrial applications University of Antwerp
Simulating X-ray images is of great importance in industry and medicine. Using such simulation permits us to optimize parameters which affect image's quality without the limitations of an experimental procedure. This study revolves around a novel methodology to simulate a complete industrial X-ray digital radiographic system composed of an X-ray tube and a computed radiography (CR) image plate using Monte Carlo N Particle eXtended (MCNPX) code. ...
A segmentation and classification algorithm for online detection of internal disorders in citrus using X-ray radiographs KU Leuven University of Antwerp
© 2015 Elsevier B.V. Oranges and lemons can be affected by the physiological disorders granulation and endoxerosis respectively, decreasing their commercial value. X-ray radiographs provide images of the internal structure of citrus on which the disorders can be discerned. An image processing algorithm is proposed to detect these disorders on X-ray projection images and classify samples as being affected or not. The method automatically segments ...
Automated online detection of granulation in oranges using X-ray radiographs KU Leuven
Oranges can develop granulation during production, a condition in which the juice sacs shrivel because of gel formation. The aim of this work is to develop an image processing algorithm to reliably detect granulation in X-ray projection images or radiographs of oranges. Oranges grown at South-African orchards with a known high incidence of granulation were scanned in an X-ray system (75 kV, 468 mA, 60-ms exposure). Subsequently they were ...
How Does Ambient Light Affect the Image Quality of Phosphor Plate Digital Radiography? A Quantitative Analysis Using Contemporary Digital Radiographic Systems KU Leuven
The aim of this study is to quantitatively evaluate the influence of the duration of ambient light exposure on the image quality of digital radiographs obtained with contemporary phosphor plate (PSP)-based systems. Radiographs of an aluminum step-wedge were obtained using VistaScan and Express systems at five X-ray exposure times: 0.10, 0.20, 0.32, 0.40, and 0.50 s; the resulting dose-area products were, respectively, 21.93, 43.87, 70.19, 87.75, ...
Diagnostic accuracy of phosphor plate systems and conventional radiography in the detection of simulated internal root resorption KU Leuven
OBJECTIVE: To evaluate the performance of conventional radiography and photostimulable phosphor (PSP) plate in the detection of simulated internal root resorption (IRR) lesions in early stages. MATERIALS AND METHODS: Twenty single-rooted teeth were X-rayed before and after having a simulated IRR early lesion. Three imaging systems were used: Kodak InSight dental film and two PSPs digital systems, Digora Optime and VistaScan. The digital images ...
NPWE model observer as a validated alternative for contrast detail analysis of digital detectors in general radiography KU Leuven
To propose and validate a non-prewhitening with eye filter (NPWE) model observer as an alternative means of quantifying and specifying imaging performance for general radiography detectors, in a comparative study with contrast detail analysis and detective quantum efficiency (DQE). Five different x-ray detectors were assessed, covering a range of detector technologies including powder computed radiography (CR), needle CR, and three indirect ...