1. Accuracy of dose calculation based on artefact corrected Cone Beam CT images of lung cancer patients 
Rune Slot Thing, Uffe Bernchou, Olfred Hansen, Carsten Brink 
Physics and Imaging in Radiation Oncology 
Volume 1, Pages 6-11 (January 2017)
DOI: /j.phro
Copyright © 2017 The Authors Terms and Conditions

2. Fig. 1
Two CBCT images were prepared for dose calculation for each patient. The clinical CBCT projection images were subject to extensive image corrections before being reconstructed to produce the improved CBCT. The clinical and improved CBCT images were then deformably registered to the re-simulation CT (rCT) acquired on the same day as the CBCT image projections. To compensate for the truncated field of view of the CBCT images, the missing anatomy in the deformed CBCT images was added from the rCT image to produce the cCBCT (clinical) and iCBCT (improved) images ready for dose calculation.
Physics and Imaging in Radiation Oncology 2017 1, 6-11DOI: ( /j.phro )
Copyright © 2017 The Authors Terms and Conditions

3. Fig. 2
Illustrative example dose distribution as calculated on the rCT (a), cCBCT (b), and iCBCT (c) image sets. Dose difference in the example slice is show in (d) (cCBCT-rCT) and (e) (iCBCT-rCT), while (f)-(g) show the 2%/2mm gamma values for the cCBCT and iCBCT dose distributions calculated using the rCT dose as reference dose.
Physics and Imaging in Radiation Oncology 2017 1, 6-11DOI: ( /j.phro )
Copyright © 2017 The Authors Terms and Conditions

4. Fig. 3
Box plots of 2%/2mm (top) and 1%/1mm (bottom) gamma pass rates for the entire CBCT field of view as well as for individual structures as delineated on the rCT images. Wilcoxon signed rank tests indicated statistically significant different median values at p⩽0.01 for all plots, except oesophagus where the 1%/1mm gamma pass rates were different at p=0.03. Whiskers indicate the most extreme value within 1.5 times the interquartile range from the 25th and 75th percentiles.
Physics and Imaging in Radiation Oncology 2017 1, 6-11DOI: ( /j.phro )
Copyright © 2017 The Authors Terms and Conditions

5. Fig. 4
Dose-volume histograms for an example patient. Solid line is dose calculated on the rCT image, long dashed line is dose calculated on the cCBCT image, and short dashed line is dose calculated on the iCBCT image.
Physics and Imaging in Radiation Oncology 2017 1, 6-11DOI: ( /j.phro )
Copyright © 2017 The Authors Terms and Conditions

6. Fig. 5
Box plots of dose statistics differences for the cCBCT and iCBCT based dose calculations. Dose statistics were calculated on each of the CBCT and rCT based doses and subsequently subtracted. Comparisons were made within the part of the delineated structure that was within the CBCT field of view.
Physics and Imaging in Radiation Oncology 2017 1, 6-11DOI: ( /j.phro )
Copyright © 2017 The Authors Terms and Conditions