- Survival predictive value of F-FDG PET / CT Table 3.19 + 3.21: Predictive value for survival Parameter AUC p Cut-off Sen Spe Overall survival MTV total 2 0.753 0.018 8.0 70.0 80.0 TLG total 2 0.743 0.023 27.0 70.0 80.0 Progression-free survival SUVmean 2 0.806 0.001 3.2 66.7 81.8 MTV 2 0.701 0.031 6.6 55.6 90.9 Post-treatment MTV total (cut-off of 8.0) and TLG total (cut - off of 27.0) had sensitivity and specificity of 70% and 80% in predicting overall survival.