Image Quality Using NEMA NU2-2012 for Different Reconstruction Algorithms and LBR of 8:1
| Contrast recovery (%) | Background variability (%) | |||||
| Sphere diameter (mm) | VPHD | VPHD-S | Q.Clear | VPHD | VPHD-S | Q.Clear |
| 10 | 31 ± 2 | 30 ± 2 | 33 ± 3 | 5.5 ± 0.8 | 4.8 ± 0.6 | 3.7 ± 0.1 |
| 13 | 44 ± 1 | 49 ± 1 | 51 ± 1 | 5.0 ± 0.6 | 4.4 ± 0.5 | 3.4 ± 0.1 |
| 17 | 57 ± 2 | 67 ± 2 | 70 ± 1 | 4.5 ± 0.3 | 3.9 ± 0.3 | 3.1 ± 0.2 |
| 22 | 67 ± 1 | 70 ± 1 | 77.5 ± 0.4 | 3.9 ± 0.2 | 3.5 ± 0.2 | 2.9 ± 0.2 |
| 28 | 60 ± 3 | 60 ± 2 | 68 ± 2 | 3.4 ± 0.2 | 3.4 ± 0.1 | 2.7 ± 0.1 |
| 37 | 63 ± 2 | 62 ± 2 | 77.3 ± 1 | 3.5 ± 0.3 | 3.8 ± 0.1 | 3.0 ± 0.1 |
| Lung residual (%) | — | — | — | 25.5 ± 0.3 | 26.5 ± 0.4 | 11.5 ± 0.5 |
Data are mean ± SD. Matrix was 256 × 256. Q.Clear used a β of 350. VPHD and VPHD-S used 4 iterations, 12 subsets, and 4.8-mm gaussian filter.