Table 1.
Ultrasound probe orientation affected mostly the longitudinal position readings
| Number of experiment, number of observer | Slope in longitudinal direction (mm/°) | Slope in lateral direction (mm/°) | Slope in vertical direction (mm/°) |
|---|---|---|---|
| 1st experiment, 1st observer (HB) | +0.123 ± 0.006 (r2 = 0.92) | –0.016 ± 0.005 (r2 = 0.19) | +0.004 ± 0.002 (r2 = 0.06) |
| 1st experiment, 2nd observer (BDB) | +0.122 ± 0.009 (r2 = 0.82) | –0.015 ± 0.004 (r2 = 0.30) | – 0.010 ± 0.004 (r2 = 0.16) |
| 1st experiment, 3rd observer (MR) | +0.126 ± 0.005 (r2 = 0.95) | –0.013 ± 0.005 (r2 = 0.16) | +0.001 ± 0.003 (r2 = 0.00) |
| 2nd experiment, 1st observer (HB) | +0.211 ± 0.009 (r2 = 0.93) | –0.017 ± 0.008 (r2 = 0.12) | +0.026 ± 0.009 (r2 = 0.18) |
| 2nd experiment, 2nd observer (BDB) | +0.157 ± 0.008 (r2 = 0.91) | +0.014 ± 0.006 (r2 = 0.12) | +0.035 ± 0.006 (r2 = 0.43) |
| 3rd experiment, 1st observer (HB) | +0.124 ± 0.006 (r2 = 0.93) | +0.013 ± 0.004 (r2 = 0.21) | -0.016 ± 0.003 (r2 = 0.48) |
| 3rd experiment, 2nd observer (BDB) | +0.110 ± 0.005 (r2 = 0.92) | +0.013 ± 0.003 (r2 = 0.42) | -0.011 ± 0.003 (r2 = 0.29) |