Figure 7.

DIR results for a real truncated head-and-neck cancer patient case. (a) CBCT projection with truncation; (b)~(d) transverse and sagittal view of ${\text{CBCT}}_{\text{original}}^{\text{truncated}}$, CT_original and ${\text{CT}}_{\text{deformed}}^{\text{New}}$; (e)~(h) checkerboard image of the transverse and sagittal view of CT_original and ${\text{CBCT}}_{\text{original}}^{\text{truncated}},{\text{CT}}_{\text{deformed}}^{\text{demons}}$ and ${\text{CBCT}}_{\text{original}}^{\text{truncated}},{\text{CT}}_{\text{deformed}}^{\text{NaN}}$ and ${\text{CBCT}}_{\text{original}}^{\text{truncated}},{\text{CT}}_{\text{deformed}}^{\text{New}}$ and ${\text{CBCT}}_{\text{original}}^{\text{truncated}}$. The arrow indicates the region affected by truncation.