Fig. 4.
Effect of dose on registration performance for (A) 3D-2D registration and (B) Voronoi 3D-3D registration with 7 pix mean deformation, and anatomy 3D-3D registration with (C) 7 pix mean deformation and (D) 22 pix mean deformation. Each plot shows the predicted error for each metric at optimal σb (solid lines), the measured error for each metric at that σb (markers), and the CRLB (dashed line). Similarity metrics examined included CC (red), GC (blue), G2 (magenta), and G4 (green).