Table 3.
Comparison of PET-dependent parameters between NIM PET/CT phantom and NEMA IEC Body phantom
| Sphere size (mm) | Contrast (%) | Background variability (%) | Residual error (%) | |
|---|---|---|---|---|
| NIM PET/CT phantom | 37 | 82.11 | 2.05 | 8.98 |
| 28 | 75.81 | 2.67 | ||
| 22 | 73.11 | 3.27 | ||
| 17 | 71.43 | 3.86 | ||
| 13 | 61.09 | 4.64 | ||
| 10 | 45.08 | 5.46 | ||
| 7 | 20.52 | 6.45 | ||
| 4 | – | – | ||
| NEMA IEC Body phantom | 37 | 82.21 | 1.99 | 9.10 |
| 28 | 74.84 | 2.53 | ||
| 22 | 72.38 | 3.04 | ||
| 17 | 69.01 | 3.59 | ||
| 13 | 58.41 | 4.32 | ||
| 10 | 42.52 | 5.33 |
Since the device could not detect 4 mm spheres, no measurement data of those spheres in the measurement module could be achieved. The maximum deviations are highlighted in bold