Figure 5

Central-symmetric neighborhood of a voxel within a CT slice. The neighborhood (orange band) of voxel x contains voxels within a distance \(\nu \pm \frac{1}{2}\) of x.
Central-symmetric neighborhood of a voxel within a CT slice. The neighborhood (orange band) of voxel x contains voxels within a distance \(\nu \pm \frac{1}{2}\) of x.