Sensitivity and Spatial Resolution Parameters of MiniPET-2 and MiniPET-3
| Parameter | MiniPET-2 | MiniPET-3 |
| Energy window (keV) | 350–650 | 360–662 |
| τ-value (ns) | 6.0 | 8.0 |
| Spatial resolution at one-quarter offset from axial center | ||
| Tangential (mm) | 1.36 | 1.24 |
| Radial (mm) | 1.57 | 1.15 |
| Axial (mm) | 1.83 | 1.23 |
| Sensitivity | ||
| Peak absolute sensitivity (%) | 1.37 | 1.36 |
| Total absolute sensitivity (%) | 0.6 | 0.7 |
| Image quality | ||
| Uniformity (%SD) | 5.59 | 6.49 |
| Spillover ratio for air | 0.15 | 0.14 |
| Spillover ratio for water | 0.26 | 0.24 |
| Counting rate performance | ||
| NEC peak (rat phantom) | 14 kcps (at 36 MBq) | 24 kcps (at 43 MBq) |
| NEC peak (mouse phantom) | 55 kcps (39 MBq) | 91 kcps (at 44 MBq) |
| Scatter fraction (rat phantom) | 17.4% | 16.1% |
| Scatter fraction (mouse phantom) | 5.6% | 4.8% |