Table 2 Magnitudes of the 3D registration error by the individual observers

[Magnitude of registration error]

cm

cm

cm

cm

cm

cm

Observer 1

0.42 ± 0.19

0.23 ± 0.05

0.23 ± 0.10

0.36 ± 0.13

0.30 ± 0.10

0.46 ± 0.06

Observer 2

0.74 ± 0.16

0.30 ± 0.20

0.24 ± 0.11

0.40 ± 0.14

0.66 ± 0.38

0.66 ± 0.13

Observer 3

0.70 ± 0.21

0.97 ± 0.05

0.42 ± 0.21

0.34 ± 0.07

0.64 ± 0.23

0.86 ± 0.19

Observer 4

0.65 ± 0.30

0.90 ± 0.10

0.53 ± 0.25

0.52 ± 0.19

0.29 ± 0.19

0.98 ± 0.08