Fluke Biomedical 18-222 - Manual (Page 12)

2-4
Table 2-2. Actual vs. Simulated Linear Attenuation Coefficients (u)
30% Glandular 100% Glandular
keV Actual Simulated keV Actual Simulated
10.0 3.400820 3.262850 10.0 4.919490 4.685870
15.0 1.112980 1.098010 15.0 1.560170 1.535910
20.0 0.574784 0.574784 20.0 0.768012 0.768012
30.0 0.302201 0.304501 30.0 0.368387 0.371520
40.0 0.232988 0.234800 40.0 0.268827 0.270928
50.0 0.205005 0.206445 50.0 0.229969 0.231386
60.0 0.189907 0.191118 60.0 0.209919 0.210931
80.0 0.172653 0.173673 80.0 0.188308 0.189033
100.0 0.161710 0.162638 100.0 0.175442 0.176050
50% Glandular 100% Adipose
keV Actual Simulated keV Actual Simulated
10.0 3.812000 3.622000 10.0 2.975010 2.837940
15.0 1.234110 1.213450 15.0 0.995056 0.960624
20.0 0.627163 0.627163 20.0 0.530186 0.511345
30.0 0.320188 0.323307 30.0 0.294058 0.280331
40.0 0.242758 0.245163 40.0 0.233268 0.220533
50.0 0.211829 0.213702 50.0 0.208080 0.195861
60.0 0.195389 0.196938 60.0 0.194093 0.182268
80.0 0.176952 0.178232 80.0 0.177546 0.166402
100.0 0.165485 0.166639 100.0 0.166690 0.156112
70% Glandular
keV Actual Simulated
10.0 4.231200 3.984430
15.0 1.357150 1.329930
20.0 0.679992 0.679992
30.0 0.337905 0.342249
40.0 0.252103 0.255583
50.0 0.218186 0.220987
60.0 0.200393 0.202773
80.0 0.180781 0.182797
100.0 0.168807 0.170643
Our simulated materials are formulated to maximize
simulation properties at 20 keV for the mammographic
energy range and 70 keV for the diagnostic energy range.
NOTE