Figure 2. An example (50% phase bin for patient 10) of the NCC $C_{m,m+1}$ between all adjacent slices m and $m+1$ for a scan with 16 couch positions, where $m\in [1,127]$. The the decrease of the NCC at each couch transition (indicated by the dot arrow lines). Plot (b) of $D_{b,n}$ versus couch transition n for this scan.