Table 1 Comparison between measured and calculated (Eq. (2)) incident air kerma for the reference Hologic Selenia Dimensions (device A)
From: Average absorbed breast dose (2ABD): an easy radiation dose index for digital breast tomosynthesis
Phantom thickness (cm) | Tube load (mAs) | Tube voltage (kVp) | Measured air kerma (mGy) | Calculated air kerma (mGy) | Relative difference (%) |
|---|---|---|---|---|---|
2.0 | 37.5 | 26 | 2.11 ± 0.08 | 2.06 ± 0.15 | -2.6 |
2.5 | 40 | 27 | 2.61 ± 0.10 | 2.54 ± 0.19 | -2.8 |
3.0 | 37.5 | 28 | 2.74 ± 0.11 | 2.71 ± 0.20 | -1.3 |
3.5 | 40 | 29 | 3.33 ± 0.13 | 3.24 ± 0.24 | -2.7 |
4.0 | 50 | 29 | 4.14 ± 0.17 | 4.12 ± 0.31 | -0.4 |
4.5 | 50 | 30 | 4.66 ± 0.19 | 4.59 ± 0.34 | -1.6 |
5.0 | 55 | 31 | 5.80 ± 0.23 | 5.60 ± 0.42 | -3.6 |
5.5 | 60 | 32 | 7.08 ± 0.28 | 6.73 ± 0.50 | -5.3 |
6.0 | 65 | 33 | 8.18 ± 0.33 | 7.99 ± 0.59 | -2.4 |
6.5 | 70 | 34 | 9.78 ± 0.39 | 9.40 ± 0.70 | -4.1 |
7.0 | 80 | 35 | 12.03 ± 0.48 | 11.69 ± 0.87 | -2.9 |
7.5 | 80 | 36 | 13.02 ± 0.52 | 12.68 ± 0.94 | -2.7 |
8.5 | 80 | 38 | 15.19 ± 0.61 | 14.78 ± 1.10 | -2.8 |
8.5 | 90 | 42 | 21.52 ± 0.86 | 20.55 ± 1.53 | -4.7 |