Detector response functions modeled by Schlomka et al. (Ref. 13) for incident photons of 30, 45, 60, and 75 keV.
The true linear attenuation coefficient of water compared to the attenuation coefficient estimated in the presence of spectrum tailing for varying material thicknesses.
The ratio of the estimated to true attenuation coefficients of water and iodine for a 20 cm slab thickness.
Central horizontal profile through images reconstructed from the five energy bins simulated with ideal and spectrum tailing conditions.
Contrast and noise in energy-bin images simulated with ideal and spectrum tailing conditions.
Comparison of image-based weights calculated for ideal conditions (IB-ideal), spectrum tailing conditions using Eq. (2) (IB-spectrum tailing), and weights optimized for spectrum tailing by measuring both the contrast and noise in the energy-bin images (-spectrum tailing).
Comparison of profiles of images reconstructed with photon-counting, projection-based, and image-based weights for ideal and spectrum tailing conditions.
CNR in images reconstructed with integrating, counting, optimal image, and projection-based weighting for a range of scatter conditions.
CNR in images reconstructed with integrating, counting, and image-based weighting for a range of scatter conditions after ideal deterministic scatter correction.
Images reconstructed with image-based weighting under (a) ideal conditions, (b) spectrum tailing, (c) scatter (8.9°), and (d) combined scatter and spectrum tailing effects. All images are windowed to display −250 to 250 HU.
Comparison of profiles of images reconstructed with photon-counting, projection-based, and image-based weights for ideal, scatter, and combined scatter/spectrum tailing conditions.
Simulated system specifications.
Applied energy weighting methods.
Percent cupping artifact (Eq. (17)).
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