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- W4242353985 abstract "Fundamental limits for the calculation of scattering corrections within X-ray computed tomography (CT) are found within the independent atom approximation from an analysis of the cross sections, CT geometry, and the Nyquist sampling theorem, suggesting large reductions in computational time compared to existing methods. By modifying the scatter by less than 1 %, it is possible to treat some of the elastic scattering in the forward direction as inelastic to achieve a smoother elastic scattering distribution. We present an analysis showing that the number of samples required for the smoother distribution can be greatly reduced. We show that fixed forced detection can be used with many fewer points for inelastic scattering, but that for pure elastic scattering, a standard Monte Carlo calculation is preferred. We use smoothing for both elastic and inelastic scattering because the intrinsic angular resolution is much poorer than can be achieved for projective tomography. Representative numerical examples are given." @default.
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- W4242353985 date "2019-05-22" @default.
- W4242353985 modified "2023-10-06" @default.
- W4242353985 title "Scatter Corrections in X-Ray Computed Tomography: A Physics-Based Analysis" @default.
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- W4242353985 doi "https://doi.org/10.6028/jres.124.013" @default.
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