Unsupervised registration of 3D knee implant components to biplanar X-ray images

BMC Medical Imaging

Table 3 Average errors ± standard deviations and p-values of six DOFs

		Rotation (degrees)			Translation (mm)
		X	Y	Z	X	Y	Z
Femoral components	Hybrid	1.047	0.767	1.062	0.046	0.047	0.086
	Hybrid	± 0.771	± 0.591	± 0.672	± 0.03	± 0.031	± 0.043
	Potential field	1.065	0.822	0.879	0.187	0.161	0.142
	Potential field	± 0.87	± 0.68	± 0.771	± 0.146	± 0.115	± 0.127
	Object specificity	1.02	0.869	0.977	0.075	0.065	0.101
	Object specificity	± 0.767	± 0.674	± 0.722	± 0.049	± 0.052	± 0.07
Tibial components	Hybrid	0.727	0.713	0.878	0.085	0.075	0.046
	Hybrid	± 0.567	± 0.473	± 0.578	± 0.046	± 0.039	± 0.035
	Potential field	2.635	4.854	3.241	0.829	0.777	0.561
	Potential field	± 1.9	± 3.492	± 1.765	± 0.368	± 0.67	± 0.554
	Object specificity	0.641	0.776	0.869	0.073	0.109	0.067
	Object specificity	± 0.523	± 0.595	± 0.61	± 0.062	± 0.068	± 0.05
All components	Hybrid	0.887	0.74	0.97	0.065	0.061	0.066
	Hybrid	± 0.695	± 0.536	± 0.634	± 0.044	± 0.038	± 0.044
	Potential field	1.85	2.838	2.06	0.508	0.469	0.351
	Potential field	± 1.673	± 3.224	± 1.803	± 0.426	± 0.571	± 0.453
	p-value\(_{Hybrid/PotentialField}\)	\(<0.0001\)	\(<0.0001\)	\(<0.0001\)	\(<0.0001\)	\(<0.0001\)	\(<0.0001\)
	Object specificity	0.83	0.822	0.923	0.074	0.087	0.084
	Object specificity	± 0.684	± 0.637	± 0.67	± 0.056	± 0.064	± 0.063
	p-value\(_{Hybrid/ObjectSpecificity}\)	0.5093	0.2225	0.5552	0.0989	\(<0.0001\)	0.0012

ISSN: 1471-2342