Contrast Recovery and Background Variability
| TOF OSEM − PSF | Q.Clear | |||
| Sphere diameter (mm) | CR (%) | BV (%) | CR (%) | BV (%) |
| Stanford | ||||
| 10 | 51.7 ± 2.3 | 10.2 ± 1.3 | 67.2 ± 5.1 | 7.9 ± 0.7 |
| 13 | 61.5 ± 6.2 | 7.8 ± 0.7 | 72.5 ± 4.4 | 6.2 ± 0.4 |
| 17 | 66.2 ± 2.0 | 6.0 ± 0.2 | 74.4 ± 0.8 | 4.8 ± 0.1 |
| 22 | 81.3 ± 2.1 | 4.8 ± 0.2 | 87.7 ± 0.8 | 3.8 ± 0.4 |
| 28 | 86.6 ± 1.8 | 3.8 ± 0.1 | 91.1 ± 0.6 | 2.9 ± 0.3 |
| 37 | 90.0 ± 1.4 | 3.0 ± 0.2 | 94.0 ± 0.5 | 2.4 ± 0.3 |
| Uppsala | ||||
| 10 | 55.6 ± 1.5 | 10.6 ± 0.1 | 72.9 ± 2.7 | 8.5 ± 1.0 |
| 13 | 66.5 ± 2.6 | 8.1 ± 0.3 | 80.2 ± 2.9 | 6.3 ± 0.4 |
| 17 | 80.1 ± 3.8 | 5.8 ± 0.3 | 87.1 ± 2.6 | 4.7 ± 0.1 |
| 22 | 84.1 ± 2.6 | 4.3 ± 0.5 | 90.8 ± 1.3 | 3.7 ± 0.3 |
| 28 | 86.9 ± 1.9 | 3.7 ± 0.4 | 91.8 ± 0.8 | 3.0 ± 0.4 |
| 37 | 91.4 ± 0.4 | 2.9 ± 0.3 | 94.5 ± 0.3 | 2.5 ± 0.3 |
CR = contrast recovery; BV = background variability.