51463 X-ray cone beam tomography with two tilted circular trajectories
نویسندگان
چکیده
منابع مشابه
Optimization of x-ray imaging geometry (with specific application to flat-panel cone-beam computed tomography).
A theoretical method is presented that allows identification of optimal x-ray imaging geometry, considering the effects of x-ray source distribution, imaging task, x-ray scatter, and imager detective quantum efficiency (DQE). Each of these factors is incorporated into the ICRU-recommended figure of merit for image quality, the detectability index, which is maximized to determine the optimal sys...
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X-ray computed tomography (XCT) with cone beam geometry has become a very important method for non-destructive 3D-characterisation and evaluation of materials. Compact XCT systems can reach resolutions down to 1 μm and even below. However, the polychromatic nature of the source, limited photon flux and the consequent long measurement times as well as all kinds of measurement artifacts lead to l...
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A system for cone-beam computed tomography (CBCT) based on a flat-panel imager (FPI) is used to examine the magnitude and effects of x-ray scatter in FPI-CBCT volume reconstructions. The system is being developed for application in image-guided therapies and has previously demonstrated spatial resolution and soft-tissue visibility comparable or superior to a conventional CT scanner under condit...
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Cone beam geometries are increasingly of interest for x-ray CT applications to improve imaging efficiency. In this paper, we describe our practical experience implementing circular orbit cone beam backprojection on workstation clusters. The reconstruction problem is computationally intensive, particularly for arrays of 512 voxels in each direction. A voxel driven approach is described where the...
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ژورنال
عنوان ژورنال: NDT & E International
سال: 1994
ISSN: 0963-8695
DOI: 10.1016/0963-8695(94)90360-3