Table 4.
Predictive value of significant volumetric PET parameters for DFS
| MTV relative change from PET1 to PET3 | ||||
| Recurrence | No recurrence | Total | 2 year recurrence free survival | |
| MTV Δ ≤ 87% | 6 | 8 | 14 | 43% |
| MTV Δ > 87% | 2 | 16 | 18 | 89% |
| TLG relative change from PET1 to PET3 | ||||
| Recurrence | No recurrence | 2 year recurrence free survival | 2 year recurrence free survival | |
| TLG Δ ≤ 94% | 6 | 8 | 14 | 43% |
| TLG Δ > 94% | 2 | 16 | 18 | 89% |
| MTV absolute change from PET1 to PET2 | ||||
| Recurrence | No recurrence | Total | 2 year recurrence free survival | |
| MTV Δ ≤ 10.25 | 7 | 6 | 13 | 46% |
| MTV Δ > 10.25 | 2 | 24 | 26 | 92% |
Δ, change; MTV, metabolic tumour volume; PET, positron emission tomography;TLG, total lesion glycolysis.
a
Calculated using a SUV threshold of 2.5.