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Ch. Heinzl, M. Reiter, E. Gröller, A. Amirkhanov:
"Visual Optimality and Stability Analysis of 3DCT Scan Positions";
IEEE Transactions on Visualization and Computer Graphics, 16 (2010), 6; S. 1477 - 1486.

Industrial cone-beam X-Ray computed tomography (CT) systems often face problems due to artifacts caused by a bad placement of the specimen on the rotary plate. This paper presents a visual-analysis tool for CT systems, which provides a simulation-based preview and estimates artifacts and deviations of a specimen´s placement using the corresponding 3D geometrical surface model as input. The presented tool identifies potentially good or bad placements of a specimen and regions of a specimen, which cause the major portion of artefacts. The tool can be used for a preliminary analysis of the specimen before CT scanning, in order to determine the optimal way of placing the object. The analysis includes: penetration lengths, placement stability and an investigation in Radon space. Novel visualization techniques are applied to the simulation data. A stability widget is presented for determining the placement parameters´ robustness. The performance and the comparison of results provided by the tool compared with real world data is demonstrated using two specimens.

http://dx.doi.org/10.1109/TVCG.2010.214