Figure 4.

Box plot of the averaged Euclidean distance error (Eu) of all patients, for the various methods applied to the CMAC data. The various steps from our proposed framework, using Elastix as the base pairwise registration: FM Forward Marching with fully Eulerian (Eul), Lagrangian (Lag) and Quadratic weights, Init initialisation, CC consistency correction, and the motion estimation algorithms of CMAC participants: INRIA Inria Asclepios, MEVIS Fraunhofer MEVIS, and UPF Universitat Pompeu Fabra. The whiskers are the lowest and highest datum at 1.5 $\times$ of interquartile range assuming normally distributed data. Data beyond the whiskers are considered outliers, labelled with ‘+’. Their average ($\widehat{\mathit{Eu}}$) are labelled as ‘x’. ‘*’ labels p-value $<0.01$ in one-tail paired t-test against CC.