Table 2.

Summary of the DVF and CT image errors for the pelvic CT image with 64 target radiographs and varying levels of noise and contrast mismatch.

	DVF nRMSE	CT nRMSE	Mean∕Max. DVF error magnitude (mm)
Direct fit	0.0227	0.0116	0.045∕0.396
3D3D registration	0.0299	0.0072	0.060∕0.693
2D3D No noise, ε=0	0.0706	0.0108	0.123∕3.35
2D3D 1% noise	0.1071	0.0182	0.185∕4.36
2D3D 3% noise	0.1208	0.0356	0.295∕3.33
2D3D 5% noise	0.1682	0.0630	0.447∕1.96
2D3D ε=0.0025	0.3700	0.1222	0.990∕4.85
2D3D ε=0.005	0.8905	0.2388	2.279∕10.4