Jan De Beenhouwer

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In Computed Tomography (CT), motion and deformation during the acquisition lead to streak artefacts and blurring in the reconstructed images. To remedy these artefacts, we introduce an efficient algorithm to estimate and correct for global affine deformations directly on the cone beam projections. The proposed technique is data-driven and thus removes the(More)
Nem szakmai kurzus: 12. Vincze Veronika: How to write and present academic papers in computer science Balázs Péter: Ipari röntgentomográfia Magyarul. Tömbösítve, otthonra is kiadott feladatokkal. Tematika-A 3D Tire Scanner rendszer felépítése-Kalibráció, vetületek előfeldolgozása, mozgás-és zajkorrekció-Folytonos és diszkrét rekonstrukciós algoritmusok(More)
In X-ray imaging, it is common practice to normalize the acquired projection data with averaged flat fields taken prior to the scan. Unfortunately, due to source instabilities, vibrating beamline components such as the monochromator, time varying detector properties, or other confounding factors, flat fields are often far from stationary, resulting in(More)
In emission tomography, iterative reconstruction is usually followed by a linear smoothing filter to make such images more appropriate for visual inspection and diagnosis by a physician. This will result in a global blurring of the images, smoothing across edges and possibly discarding valuable image information for detection tasks. The purpose of this(More)
GATE is a software dedicated to Monte Carlo simulations in Single Photon Emission Computed Tomography (SPECT) and Positron Emission Tomography (PET). An important disadvantage of those simulations is the fundamental burden of computation time. This manuscript describes three different techniques in order to improve the efficiency of those simulations.(More)
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