Fig. 1From: Prognostic value of lymph node to primary tumor standardized uptake value ratio in unresectable esophageal cancerROC (receiver operating characteristic) curve analysis of distant metastasis-free survival prediction according to the node-to-tumor ratio of SUV (NTR). The area under the curve was 0.648 (95% confidence interval [CI] 0.523–0.773). The best NTR cut-off value was 0.46 for prediction of distant metastasisBack to article page