Comparison of Effective Transaxial FWHM Resolution with Crystal Size
| System | Crystal size (mm) | Effective transaxial FWHM resolution at 5 mm (mm) | Resolution/crystal size |
| microPET P4 | 2.2 | 2.24 | 1.02 |
| microPET R4 | 2.2 | 2.20 | 1.00 |
| microPET Focus 120 | 1.51 | 1.78 | 1.18 |
| microPET Focus 220 | 1.51 | 1.74 | 1.15 |
| Inveon | 1.51 | 1.64 | 1.08 |
| ClearPET | 2 | 2.02 | 1.01 |
| Mosaic HP | 2 | 2.34 | 1.17 |
| Argus | 1.45 | 1.66 | 1.14 |
| VrPET | 1.4 | 1.61 | 1.15 |
| LabPET 8 | 2 | 1.64 | 0.82 |