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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 (%)
100337.5280.94 ± 0.191.00 ± 0.20-6.0
100450291.21 ± 0.231.21 ± 0.240.0
100555311.45 ± 0.261.46 ± 0.29-0.7
100665331.87 ± 0.331.89 ± 0.38-1.1
100780352.57 ± 0.442.57 ± 0.31-2.3
80337.5280.96 ± 0.191.06 ± 0.21-9.4
80450291.24 ± 0.241.30 ± 0.26-4.6
80555311.48 ± 0.271.58 ± 0.32-6.3
80665331.91 ± 0.342.04 ± 0.41-6.4
80780352.56 ± 0.452.78 ± 0.56-7.9
60337.5280.98 ± 0.201.12 ± 0.22-12.5
60450291.26 ± 0.241.40 ± 0.28-10.0
60555311.51 ± 0.271.70 ± 0.34-11.2
60665331.95 ± 0.342.21 ± 0.44-11.8
60780352.62 ± 0.463.01 ± 0.60-13.0
40337.5281.00 ± 0.201.19 ± 0.24-16.0
40450291.29 ± 0.251.50 ± 0.30-14.0
40555311.55 ± 0.281.84 ± 0.37-15.8
40665332.00 ± 0.352.41 ± 0.48-17.0
40780352.68 ± 0.473.29 ± 0.66-18.5
20337.5281.03 ± 0.211.26 ± 0.25-18.3
20450291.32 ± 0.251.61 ± 0.32-18.0
20555311.59 ± 0.282.00 ± 0.40-20.5
20665332.04 ± 0.362.62 ± 0.52-22.1
20780352.74 ± 0.483.58 ± 0.72-23.5
  1. Data for AGD from 2ABD and for AGD by Dance are presented as mean ± standard deviation. The comparison was carried out by considering the reference mammographic devices (Hologic, device A). The exposure parameters were chosen as close as possible to the corresponding AEC settings for a given phantom thickness. For the AGD by Dance, the measured air kerma was employed