Image Quality Using NEMA NU2-2012 for Different Reconstruction Algorithms and LBR of 2:1
| Contrast recovery (%) | Background variability (%) | |||||
| Sphere diameter (mm) | VPHD | VPHD-S | Q.Clear | VPHD | VPHD-S | Q.Clear |
| 10 | 18 ± 4 | 18 ± 2 | 13 ± 1 | 4.4 ± 0.9 | 3.5 ± 0.8 | 2.5 ± 0.6 |
| 13 | 37 ± 3 | 35 ± 2 | 33 ± 1 | 4.0 ± 0.6 | 3.3 ± 0.7 | 2.3 ± 0.5 |
| 17 | 59 ± 4 | 60 ± 3 | 60 ± 2 | 3.6 ± 0.4 | 3.1 ± 0.5 | 2.2 ± 0.4 |
| 22 | 70 ± 4 | 72 ± 3 | 75 ± 1 | 3.4 ± 0.3 | 3.0 ± 0.3 | 2.1 ± 0.3 |
| 28 | 61 ± 1 | 61 ± 1 | 71.1 ± 0.3 | 3.3 ± 0.3 | 3.0 ± 0.3 | 2.2 ± 0.2 |
| 37 | 64 ± 2 | 64 ± 1 | 77 ± 1 | 3.5 ± 0.3 | 3.2 ± 0.3 | 2.6 ± 0.1 |
| Lung residual (%) | — | — | — | 26 ± 0.3 | 26.8 ± 0.2 | 11.8 ± 0.3 |
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.