18F-FDG PET/CT Uptake Parameters
| Variable | Free breathing | PFV PET/CT | Difference | P |
| Anterior–posterior motion (mm) | 21 ± 11 | 4 ± 2 | −80% ± 12% | 0.07 |
| SUVmax (g/mL) | 3.1 ± 1.0 | 4.0 ± 1.4 | +29% ± 12% | 0.07 |
| SUVpeak (g/mL) | 1.9 ± 1.3 | 2.2 ± 1.6 | +11% ± 23% | 0.5 |
| SUVmean 42% (g/mL) | 1.9 ± 0.5 | 2.4 ± 1.6 | +22% ± 24% | 0.14 |
| Metabolic volume42% (mL) | 2.6 ± 2.4 | 1.6 ± 1.4 | −19% ± 34% | 0.6 |
| TLG42% (g) | 5.8 ± 7.6 | 3.9 ± 3.5 | −5% ± 39% | 0.99 |
| SUVpeak (lung) (g/mL) | 0.52 ± 0.05 | 0.39 ± 0.14 | −25% ± 19% | 0.14 |
| Lesion-to-lung SUVpeak ratio | 3.8 ± 2.9 | 6.8 ± 6.9 | +54% ± 41% | 0.07 |
| SUVmax (patient 2: mediastinal lymph nodes, n = 5) (g/mL) | 2.7 ± 0.5 | 3.3 ± 0.78 | +23% ± 14% | 0.04 |