Figure 5.

Longitudinal thoracic CT postdeformable registration normalized mutual information (NMI) values for each of the 36 registration setting combinations. A legend for each of the numbered settings is available in Table 2. The five patients are denoted by separate colored symbols, while bars represent the average values. It is generally assumed that the greater the NMI value, the superior the registration. A consistency exists in that registration settings, whether they perform poorly, admirably, or somewhere in between, perform similarly for all thoracic CT patients investigated.