Table 7 Calibration accuracy using the cubic-spline height interpolation
Target/filter and kV combination | Within-unit calibration: H1 | Within-unit calibration: H2 | Target/filter and kV combination | Within-unit calibration: H3 | |||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
Non-BL height (cm) | BL | Non-BL | BL | Non-BL | Non-BL height (cm) | BL | Non-BL | ||||
W/Rh | Mo/Mo | ||||||||||
kV = | 25 | -- | -- | -- | -- | -- | kV = | 25 | 4.2 | 54.5 (0.49) | 54.9 (0.84) |
26 | 4.2 | 46.5 (0.36) | 48.6 (0.67) | 51.1 (0.41) | 52.8 (0.76) | 26 | 4.4 | 53.7 (0.40) | 54.5 (0.47) | ||
27 | 4.4 | 48.6 (0.67) | 48.8 (0.42) | 51.4 (0.43) | 50.9 (0.82) | 27 | 4.2 | 54.6 (0.34) | 54.7 (0.70) | ||
28 | 4.2 | 48.4 (0.39) | 49.6 (0.65) | 51.8 (0.68) | 53.2 (0.91) | 28 | 4.4 | 54.6 (0.23) | 54.7 (0.32) | ||
29 | 4.4 | 47.8 (0.49) | 48.3 (0.53) | 51.3 (0.56) | 52.9 (0.63) | 29 | 4.2 | 55.4 (0.17) | 55.2 (0.56) | ||
30 | 4.2 | 48.2 (0.70) | 48.5 (0.80) | 51.9 (0.51) | 51.7 (0.88) | 30 | 4.4 | 55.1 (0.20) | 54.8 (0.31) | ||
31 | -- | -- | -- | -- | -- | 31 | 4.2 | 55.7 (0.32) | 55.9 (0.52) | ||
W/Ag | Mo/Rh | ||||||||||
kV = | 27 | 4.2 | 46.5 (0.73) | 47.8 (0.91) | 52.0 (0.54) | 53.5 (0.89) | kV = | 27 | 4.2 | 53.6 (1.52) | 53.9 (1.68) |
28 | 4.4 | 47.3 (0.85) | 48.0 (0.96) | 52.1 (0.52) | 51.8 (0.65) | 28 | 4.4 | 53.8 (1.52) | 54.2 (1.38) | ||
29 | 4.2 | 47.5 (0.90) | 48.4 (1.10) | 50.9 (0.49) | 52.4 (0.73) | 29 | 4.2 | 54.0 (1.52) | 54.2 (1.68) | ||
30 | 4.4 | 47.8 (0.95) | 48.0 (0.99) | 51.6 (0.52) | 51.5 (0.54) | 30 | 4.4 | 54.5 (1.42) | 54.3 (1.23) | ||
31 | 4.2 | 52.4 (0.86) | 52.8 (1.13) | 52.0 (0.50) | 52.0 (0.56) | 31 | 4.2 | 54.6 (1.37) | 54.7 (1.52) | ||
32 | 6.4 | 51.9 (0.75) | 52.4 (0.78) | 53.6 (0.57) | 54.5 (0.61) | 32 | 4.4 | 54.6 (1.24) | 54.1 (0.98) | ||
33 | -- | -- | -- | -- | -- | 33 | 4.2 | 55.0 (1.15) | 55.0 (1.29) | ||
34 | -- | -- | -- | -- | -- | 34 | 4.4 | 55.6 (1.00) | 52.9 (0.76) | ||