Parameters for the 57Co and 141Ce Phantoms
| Parameter | 141Ce phantom | 57Co phantom |
| Isotope | ||
| Atomic number | 58 | 27 |
| Half-life (d) | 32.5 | 271.7 |
| γ-energy (keV) | 145.4 | 122 |
| Scanning | ||
| Collimator | LEHR | LEHR |
| Energy peak (keV) | 145 | 122 |
| Energy window (%) | 10 | 10 |
| Matrix | 256 × 256 | 256 × 256 |
| Kilocounts | 4,000 | 4,000 |
| Processing | ||
| Workstation | Infinia Hawkeye 2 | Xeleris 1.123 |
| Field of view (mm) | 550 × 350 | 550 × 350 |
| Matrix | 256 × 256 | 256 × 256 |
LEHR = low-energy, high-resolution.