Fig. 7.

Structural variations before and after motion correction. Left column: Two original X-FAST input volumes quasi-rigidly registered. Middle column: Two disjoint volume pairs with the same X-FAST input volumes as used in the left column motion corrected and merged with $\alpha =0.0001$ and ${\alpha }_z=0.1$. The two merged volumes were then quasi rigidly registered and are shown. Right column: Same as middle column with $\alpha =0.1$. Top Row: Checkerboard fundus views of different quasi-rigidly registered volumes. Middle Row: Red-green composite images of the central slices in y direction. Bottom Row: Red-green composite images of the central slices in x direction. Both the original volumes and the volumes that were processed with a too low alpha show considerable variability in structure. In contrast, the volumes that were corrected with the optimal settings (right) show a very high degree of agreement.