Figure 3. GPA in SSS + LS in SSS + PCA.

The LS procedure centered on GM allows (by contrast to what seen in Fig. 2) the appreciation of pure deformation patterns without the noise due to inter-individual variation. Importantly, centering deformations on GM allows also to consider both systole and diastole as deformed states. Deformations relative to the GM (shown in light grey) are depicted. The colormap ranges from blue (min) to red (max) and refers to |x_M − x|, with x_M the position of a point in the GM and x its position at the specified axis extreme (positive or negative).