Standard phantom | 1 mm slant | 2 mm slant | 3 mm slant | 4 mm slant | |||||
---|---|---|---|---|---|---|---|---|---|
mean (SD) | range (cm) | mean (SD) | range (cm) | mean (SD) | range (cm) | mean (SD) | range (cm) | mean (SD) | range (cm) |
0.012 (0.005) | 1 | -0.005 (0.008) | 1.7-1.8 | -0.004 (0.010) | 1.6-1.8 | 0.005 (0.009) | 1.5-1.8 | -0.008 (0.008) | 1.4-1.8 |
0.009 (0.006) | 2 | -0.009 (0.008) | 2.7-2.8 | -0.010 (0.008) | 2.6-2.8 | -0.011 (0.009) | 2.1-2.4 | -0.022 (0.006) | 2.4-2.8 |
0.003 (0.006) | 3 | -0.010 (0.008) | 3.2-3.3 | -0.015 (0.008) | 3.1-3.3 | -0.021 (0.009) | 3.1-3.4 | -0.027 (0.007) | 3.0-3.4 |
-0.016 (0.006) | 4 | -0.018 (0.008) | 3.7-3.8 | -0.022 (0.008) | 3.6-3.8 | -0.035 (0.011) | 3.5-3.8 | -0.038 (0.009) | 3.5-3.9 |
-0.023 (0.009) | 5 | -0.025 (0.009) | 4.7-4.8 | -0.029 (0.009) | 4.6-4.8 | -0.046 (0.013) | 4.5-4.8 | -0.049 (0.013) | 4.4-4.8 |
-0.032 (0.012) | 6 | -0.028 (0.010) | 5.3-5.4 | -0.034 (0.011) | 5.2-5.4 | -0.051 (0.015) | 5.3-5.6 | -0.0632 (0.018) | 5.4-5.8 |