Fig. 5From: Retention index of FDG-PET/CT SUVmax of the primary tumor in non-small cell lung cancer as a predictor of lymph node metastasis: a retrospective studyCorrelation coefficient value between the retention index and pathological tumor size in all the histological types was 0.35 (95% CI 0.23–0.46; p < 0.01)Back to article page