Table 3 Repeatability of position detection by ExacTrac (N = 14)
mean ± SD | range | 95% (abs.) | 50% (abs.) | |
|---|---|---|---|---|
Difference before – after | ||||
lateral | –0.08 ± 0.52 | –0.94 to +0.53 | <0.8 | <0.5 |
longitudinal | –0.05 ± 0.70 | –0.74 to +1.01 | <0.8 | <0.1 |
vertical | –0.03 ± 0.42 | –0.67 to +0.83 | <0.7 | <0.3 |
radial | 0.73 ± 0.32 | 0.26 to 1.28 | <1.2 | <0.7 |