Table 1.

Summarized tracking errors per scanner source, including mean, standard deviation, and 95th error percentile. N denotes the number of landmarks in each scanner source. The last row summarizes the tracking errors averaged over all 53 landmarks in this study.

Source	N	Mean (mm)	Std (mm)	95% (mm)	AVE.MaxError (mm)
CIL	3	0.73	0.51	1.66	1.82
ETH	16	0.59	0.60	1.52	1.64
ICR	12	0.59	0.36	1.39	1.52
MED	22	0.73	0.62	1.71	1.88
ALL	53	0.65	0.56	1.57	1.69