Validation of the registration assessment results based on simulated CT–MR data shifted purposely. Colored bars represent the percentage of correctly or falsely classified voxels as: safe (green) or unsafe (red). Results show that the algorithm is optimistic (some false-safe voxels exist), but there is practically no false detection (< 0.3%) of unsafe voxels.
A, Horizontal shift by 0–5 mm.
B, Vertical shift by 0–5 mm.