Table 6 Comparison between AGD computed from 2ABD and the AGD calculated by the Dance approach for different glandularities
From: Average absorbed breast dose (2ABD): an easy radiation dose index for digital breast tomosynthesis
Glandularity (%) | Phantom thickness (cm) | Tube load (mAs) | Tube voltage (kVp) | AGD from 2ABD (mGy) | AGD by Dance (mGy) | Relative difference (%) |
|---|---|---|---|---|---|---|
100 | 3 | 37.5 | 28 | 0.94 ± 0.19 | 1.00 ± 0.20 | -6.0 |
100 | 4 | 50 | 29 | 1.21 ± 0.23 | 1.21 ± 0.24 | 0.0 |
100 | 5 | 55 | 31 | 1.45 ± 0.26 | 1.46 ± 0.29 | -0.7 |
100 | 6 | 65 | 33 | 1.87 ± 0.33 | 1.89 ± 0.38 | -1.1 |
100 | 7 | 80 | 35 | 2.57 ± 0.44 | 2.57 ± 0.31 | -2.3 |
80 | 3 | 37.5 | 28 | 0.96 ± 0.19 | 1.06 ± 0.21 | -9.4 |
80 | 4 | 50 | 29 | 1.24 ± 0.24 | 1.30 ± 0.26 | -4.6 |
80 | 5 | 55 | 31 | 1.48 ± 0.27 | 1.58 ± 0.32 | -6.3 |
80 | 6 | 65 | 33 | 1.91 ± 0.34 | 2.04 ± 0.41 | -6.4 |
80 | 7 | 80 | 35 | 2.56 ± 0.45 | 2.78 ± 0.56 | -7.9 |
60 | 3 | 37.5 | 28 | 0.98 ± 0.20 | 1.12 ± 0.22 | -12.5 |
60 | 4 | 50 | 29 | 1.26 ± 0.24 | 1.40 ± 0.28 | -10.0 |
60 | 5 | 55 | 31 | 1.51 ± 0.27 | 1.70 ± 0.34 | -11.2 |
60 | 6 | 65 | 33 | 1.95 ± 0.34 | 2.21 ± 0.44 | -11.8 |
60 | 7 | 80 | 35 | 2.62 ± 0.46 | 3.01 ± 0.60 | -13.0 |
40 | 3 | 37.5 | 28 | 1.00 ± 0.20 | 1.19 ± 0.24 | -16.0 |
40 | 4 | 50 | 29 | 1.29 ± 0.25 | 1.50 ± 0.30 | -14.0 |
40 | 5 | 55 | 31 | 1.55 ± 0.28 | 1.84 ± 0.37 | -15.8 |
40 | 6 | 65 | 33 | 2.00 ± 0.35 | 2.41 ± 0.48 | -17.0 |
40 | 7 | 80 | 35 | 2.68 ± 0.47 | 3.29 ± 0.66 | -18.5 |
20 | 3 | 37.5 | 28 | 1.03 ± 0.21 | 1.26 ± 0.25 | -18.3 |
20 | 4 | 50 | 29 | 1.32 ± 0.25 | 1.61 ± 0.32 | -18.0 |
20 | 5 | 55 | 31 | 1.59 ± 0.28 | 2.00 ± 0.40 | -20.5 |
20 | 6 | 65 | 33 | 2.04 ± 0.36 | 2.62 ± 0.52 | -22.1 |
20 | 7 | 80 | 35 | 2.74 ± 0.48 | 3.58 ± 0.72 | -23.5 |