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Non‐natural‐body material vs natural material performance: A comparison of the mean HU values of the bone contour of the Rando phantom (a) and the Teflon insert in the CatPhan (b). The low and high energy scans along with seven different virtual monoenergetic scans are shown. The DD overcorrects the HU of Teflon, inverting the typical ratio. This is what leads to significantly different extrapolations in the monoenergetic reconstructions.
