Reproducibility of Tumor SUV Measurements (n = 18) for 4 Combinations of ROI Definition and Image Matrix Size
| Combination | Mean absolute difference (%) | Within-patient SD (%) | Repeatability (%) |
| SUVmax, 128 × 128 | 6.1 ± 5.2 | 5.6 ± 0.9 | 15.6 ± 2.6 |
| SUVmax, 256 × 256 | 6.6 ± 6.2 | 6.5 ± 1.1 | 18.0 ± 3.0 |
| SUVpeak, 128 × 128 | 3.3 ± 2.3 | 2.5 ± 0.4 | 7.0 ± 1.2 |
| SUVpeak, 256 × 256 | 2.7 ± 2.2 | 2.4 ± 0.4 | 6.6 ± 1.1 |