Table 2.

Deviations of estimated 3-D landmark positions from the respective centroid projected onto the x-ray plane of the first view. Again, the average distance is stated as a tuple of mean and standard deviation and all values are given in millimeters.

Distance to	First run	Second run	Third run	Fourth run	Fifth run	Average
Centroid P1	4.59	3.42	4.78	0.32	2.96	(3.21,1.79)
Centroid P2	5.05	3.71	6.06	3.17	0.36	(3.67,2.17)
Centroid P3	3.93	3.82	5.11	3.32	3.57	(3.96,0.70)
Centroid P4	6.48	4.24	3.45	4.69	1.31	(4.03,1.89)