Figure 4.

Checkerboard comparisons of the DIR results (Case 5). Columns: (a) ${\text{CT}}_{\text{original}}\&\mathit{CBC}{T}_{\text{original}}^{\text{complete}}$; (b) ${\text{CT}}_{\text{deformed}}^{\text{demons}}\&\mathit{CBC}{T}_{\text{original}}^{\text{complete}}$; (c) ${\text{CT}}_{\text{deformed}}^{\text{NaN}}\&\mathit{CBC}{T}_{\text{original}}^{\text{complete}}$; (d) ${\text{CT}}_{\text{deformed}}^{\text{New}}\&\mathit{CBC}{T}_{\text{original}}^{\text{complete}}$. Rows: (a)-1 ~ (d)-1: transverse images; (a)-2 ~ (d)-2: zoomed-in views of the transverse images; (a)-3 ~ (d)-3: sagittal images; (a)-4 ~ (d)-4: zoomed-in views of the sagittal images. Circles in (a)-1 ~ (d)-1 and lines in (a)-3 ~ (d)-3 indicate the FOV after truncation, and the dashed rectangles indicate the regions to be zoomed in.