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. 2019 Jun 22;11:1–8. doi: 10.1016/j.phro.2019.06.001

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© 2019 The Authors

This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).

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Fig. 3 — Left: Box-plot of differences between CT-DRR to planar kV-image and sCTc-DRR to planar kV-image registration for anterior-posterior (AP), cranio-caudal (CC) and left–right (LR) directions evaluated using a group of 20 patients. Right: Box-plot of difference between CT-DRR to planar kV-image and sCT-DRR to planar kV-image registration for AP, CC and LR directions evaluated for bulk HU (sCTb) and continuous HU (sCTc) sCT evaluated using a subset of seven patients. (CT: computed tomography, DRR: digitally reconstructed radiograph, kV: kilovoltage, sCT: synthetic computed tomography, HU: Hounsfield unit).