Table 1 Contrast values of the iodine insert obtained for the low energy levels on virtual monoenergetic images (VMIs) and with the three reconstruction levels of both versions of the deep learning spectral reconstruction (DLSR V1 and DLSR V2)
Iodine concentration | Energy level | DLSR V1 | DLSR V2 | ||||
|---|---|---|---|---|---|---|---|
Mild | Standard | Strong | Mild | Standard | Strong | ||
2 mg/mL | 40 keV | 138 ± 4.0 | 142 ± 2.5 | 143 ± 3.0 | 148 ± 5.1 | 149 ± 3.6 | 155 ± 5.0 |
50 keV | 97 ± 1.9 | 101 ± 2.0 | 96 ± 2.8 | 98 ± 2.2 | 102 ± 4.0 | 98 ± 3.5 | |
60 keV | 69 ± 1.7 | 67 ± 1.0 | 67 ± 1.5 | 70 ± 1.9 | 68 ± 2.8 | 70 ± 3.1 | |
70 keV | 46 ± 1.2 | 45 ± 0.8 | 44 ± 1.0. | 49 ± 1.1 | 48 ± 1.0 | 48 ± 1.4 | |
1 mg/mL | 40 keV | 83 ± 5.0 | 89 ± 8.0 | 86 ± 4.5 | 80 ± 4.5 | 81 ± 6.4 | 80 ± 5.1 |
50 keV | 54 ± 2.8 | 53 ± 7.0 | 51 ± 4.1 | 52 ± 3.2 | 49 ± 3.3 | 48 ± 3.8 | |
60 keV | 35 ± 1.6 | 38 ± 5.0 | 35 ± 2.8 | 34 ± 2.0 | 35 ± 2.4 | 33 ± 2.9 | |
70 keV | 22 ± 1.0 | 24 ± 3.7 | 23 ± 1.0 | 23 ± 1.8 | 22 ± 1.2 | 26 ± 1.5 | |
0.5 mg/mL | 40 keV | 42 ± 4.6 | 43 ± 4.7 | 41 ± 1.8 | 40 ± 6.0 | 39 ± 4.3 | 37 ± 3.3 |
50 keV | 25 ± 1.5 | 29 ± 3.4 | 24 ± 1.5 | 22 ± 2.0 | 26 ± 2.2 | 21 ± 2.1 | |
60 keV | 20 ± 1.0 | 23 ± 1.8 | 21 ± 1.2 | 18 ± 1.4 | 20 ± 1.6 | 19 ± 1.8 | |
70 keV | 15 ± 1.3 | 14 ± 1.1 | 17 ± 0.8 | 13 ± 1.8 | 12 ± 1.2 | 15 ± 1.0 | |