Table 8.
Image quality parameters for four different algorithms
| Sphere size (mm) | Contrast (%) | Background variability (%) | ||||||
|---|---|---|---|---|---|---|---|---|
| OESM-PSF-TOF | OSEM-TOF | OSEM-PSF | OSEM | OESM-PSF-TOF | OSEM-TOF | OSEM-PSF | OSEM | |
| 37 | 87.87 | 88.06 | 75.25 | 75.86 | 2.35 | 3.14 | 3.35 | 3.81 |
| 28 | 79.99 | 79.88 | 66.51 | 66.52 | 2.99 | 3.61 | 3.83 | 4.24 |
| 22 | 81.16 | 78.31 | 74.8 | 69.14 | 3.53 | 3.99 | 4.48 | 4.82 |
| 17 | 79.17 | 69.63 | 69.53 | 62.48 | 4.12 | 4.63 | 5.29 | 5.6 |
| 13 | 76.44 | 64.12 | 59.66 | 56.38 | 5.13 | 5.69 | 6.11 | 6.42 |
| 10 | 53.81 | 52.27 | 30.3 | 31.41 | 6.03 | 6.89 | 6.89 | 7.33 |
| 7 | 5.61 | 4.32 | – | – | 7.02 | 8.28 | – | – |
| 4 | – | – | – | – | – | – | – | – |
Numerical results in bold represent the largest increase for image contrast occurred in 10mm sphere