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Two‐dimensional displacements (a) of three stationary voxels D, E and F; two‐dimensional displacements (b) of the voxels in (a) with a simple sinusoidal motion; displacements along J‐direction (c) of the three voxels D, E and F from a simple sinusoidal motion; displacements along K‐direction (d) from motion as in (c).
