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. Author manuscript; available in PMC: 2018 Sep 1.
Published in final edited form as: IEEE Trans Med Imaging. 2017 Apr 24;36(9):1808–1819. doi: 10.1109/TMI.2017.2696338

Fig. 1.

Fig. 1

(left) Ideal discrete spectra and (right) realistic spectra estimated from the experimental photon-counting CT system for energy windows with thresholds at 25 keV, 40 keV, and 60 keV.