Detectability in Standard- and Small-Voxel Reconstructions
| Sphere diameter (mm)* | ||||||
| Acquisition time | Voxel size | 4 | 5 | 6 | 8 | 10 |
| 120 min | ||||||
| OSEM | 4 mm | 6.8 | 13.3 | 33.5 | 78.5 | 166.7 |
| 2 mm | 13.1 | 22.3 | 45.0 | 92.8 | 151.9 | |
| OSEM+PSF | 4 mm | NA | 11.1 | 30.1 | 77.4 | 195.6 |
| 2 mm | 7.1 | 15.8 | 40.9 | 116.1 | 265.4 | |
| OSEM+TOF | 4 mm | 9.5 | 19.6 | 48.3 | 105.1 | 211.2 |
| 2 mm | 14.6 | 31.3 | 61.2 | 137.2 | 190.3 | |
| 2 min | ||||||
| OSEM | 4 mm | NA | 3.1 ± 4.4 | 7.6 ± 6.2 | 13.6 ± 4.3 | 34.6 ± 11.4 |
| 2 mm | NA | NA | 12.7 ± 13.2 | 15.2 ± 5.6 | 32.2 ± 15.4 | |
| OSEM+PSF | 4 mm | NA | 2.8 ± 3.2 | 7.8 ± 6.5 | 14.0 ± 1.8 | 41.3 ± 9.4 |
| 2 mm | NA | 3.7 ± 3.0 | 11.4 ± 9.6 | 16.4 ± 2.3 | 47.5 ± 10.5 | |
| OSEM+TOF | 4 mm | NA | 4.6 ± 0.2 | 8.4 ± 5.1 | 17.0 ± 1.5 | 40.2 ± 10.2 |
| 2 mm | NA | NA | 12.2 ± 5.5 | 17.0 ± 2.5 | 30.3 ± 5.6 | |
↵* Data are mean, or mean ± SD.
NA = not available.