Figure 4.

Micro-CT images of a cylinder with regular screw thread on the surface. (a) Cross-section image of the whole FOV. (b) Rearranged Cross-section image of different parts of frame A, in such a way that the central part of the FOV from one side (e.g., 3, 5) is displayed opposing the peripheral part of the FOV from the other side of the cylinder (e.g., 8, 2). There is a one-to-one correspondence in the screw thread on both sides of the interface in frame (b), therefore any voxel size variations between central and peripheral parts must be small.