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Table 1 SNR values for all horizontal (h) and vertical (v) test objects in the phantom for the different phantom configurations 1 (without the additional bone-like absorber) and 2 (with the additional bone-like absorber) at different exposure times

From: Simultaneous wood and metal particle detection on dark-field radiography

SNR values for wooden and metallic objects in attenuation and dark-field
Attenuation
Phantom Config 1 Config 2 Config 1 Config 2
Exposure (s) 5 1 2 5 1 2
Test objects Wood Aluminium
1 h 1.7 1.1 0 4.9 2.7 0
1 v 1.7 0 0 4.3 2.1 0
2 h 2.6 0 0 3.2 1.5 0
2 v 2.5 1.3 0 1.9 0 0
3 h 2.5 1.6 0 6.5 3.1 1.4
3 v 3.1 1.0 0 4.6 2.4 1.4
4 h 4.9 2.0 0 8.2 3.7 1.4
4 v 4.6 2.2 0 8.4 3.9 1.9
Dark-field
Phantom Config 1 Config 2 Config 1 Config 2
Exposure (s) 5 1 2 5 1 2
Test objects Wood Aluminium
1 h 1.6 0 0 0 0 0
1 v 7.5 3.1 3.7 0 0 0
2 h 1.9 0 0 0 0 0
2 v 19.4 8.6 3.4 0 0 0
3 h 1.6 0 0 0 0 0
3v 18.7 8.7 3.8 0 0 0
4 h 3.3 1.6 0 0 0 0
4 v 25.2 11.4 5.4 0 0 0