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- W2079326900 abstract "The spatial resolution of CT images is dominated by the focal spot size when it is large relative to the detector cells. We propose an approach to increase the spatial resolution by utilizing an aperture collimator. The aperture collimator is specially designed and placed in front of the X-ray source so that the rays penetrating the collimator form a set of narrow fan beams. Then an iterative algorithm is introduced to reconstruct CT images from the data obtained by scanning the narrow fan beams. Numerical experiments show that the proposed approach could significantly increase the resolution of the CT images. Furthermore, this approach is also robust against some challenging cases, such as the examination of low contrast object, reconstruction based on multi-energy data and perturbation of geometric errors in CT systems." @default.
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- W2079326900 date "2013-11-07" @default.
- W2079326900 modified "2023-09-30" @default.
- W2079326900 title "An approach to increasing the resolution of industrial CT images based on an aperture collimator" @default.
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- W2079326900 doi "https://doi.org/10.1364/oe.21.027946" @default.
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