Fig. 1
From: Deformable image registration for adaptive radiotherapy with guaranteed local rigidity constraints
Visualization of displacement regularity in Case 4. a shows a 3D-visualization of the CT image (single coronal slice) with bladder (yellow), prostate (blue) and detected grid foldings generated by the VSA algorithm (red). b–e show close-up coronal projections of the deformation field of the VSA algorithm (left) and the REG2 algorithm (right) on prostate/bladder b/c and right femoral head d/e