Abstract: Abstract　Objective: In the present work, the sensitivity, specificity, and accuracy of 18F-FDG-PET and 18F-FDG-CT scans were evaluated during T and N staging of esophageal carcinoma ( EsCa ) and the relationship between SUV values and EsCa survival rates was explored. Methods: Twenty-nine EsCa patients were subjected to PET and CT scans after surgery. Postoperative pathological T and N stages were compared with clinical T and N stages. Results: The accuracy of T stage EsCa diagnosis by CT was significantly higher than that by PET. Although the accuracy of N stage diagnosis by PET was higher than that by CT, no significant differences between the two scans were observed. It was clear that only the Kappa value of the preoperative PET scan in T stage diagnosis was poor ( Kappa value < 0.4 ). The Kappa values for PET scans in N stage diagnosis and preoperative CT scans in T and N stage diagnosis were all favorable ( Kappa value > 0.4 ). SUV values increased as the volume and length of the tumor determined with PETsuv2.5  increased. Survival rates of patients with SUV values < 9.0 were better than those with SUV values ≥ 9.0. Conclusion: Compared with PET scans, CT scans have a definite advantage during T stage diagnosis of EsCa. The accuracies of N stage diagnosis by both CT and PET examinations are high. An SUV value of 9.0 may be regarded as a practical index to determine the prognosis of EsCa.