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 |