TABLE 2.

Means (standard deviations) of the RMSE (unit: mm) for the in vivo femur and tibia shape reconstruction after Phase 1 and Phase 2 using the two-phase optimization method.

Model	No. of image pairs	Phase 1	Phase 2	$p$
Femur	1 pair	0.89 (0.12)	0.81 (0.13)	< 0.05*
	2 pairs	0.79 (0.11)	0.68 (0.09)	< 0.05*
	3 pairs	0.79 (0.08)	0.64 (0.08)	< 0.05*
Tibia	1 pair	1.06 (0.19)	0.83 (0.11)	< 0.05*
	2 pairs	0.91 (0.08)	0.73 (0.04)	< 0.05*
	3 pairs	0.83 (0.10)	0.69 (0.07)	< 0.05*

*: p< 0.05, significant difference.