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Illustration of Poly-KCR robustness to different monoenergetic initializations from 0.02 to 0.04 mm−1. A) Sample reconstructions and STF estimations for 0.2, 0.3 (truth), and 0.4 mm−1 cases are shown. B) RMSE for both the reconstruction and log10(STF) are plotted as a function of the initialization.
