Systematic Error (∑)

Random Error (σ)

Mean

SD

Mean

SD

Lateral (x-axis) [mm]

1.11

2.11

1.82

2.39

Longitudinal (y-axis) [mm]

0.28

2.02

1.66

2.14

Vertical (z-axis) [mm]

−0.65

1.06

1.25

1.61