Abstract:

Objective To compare the diagnostic results of 18F-deoxyglucose positron emission tomographic-computed tomographic (18F-FDG PET-CT) imaging ,CT and golden standards in TNM stating of non-small cell lung cancer (NSCLC),and  to  evaluate the diagnostic value of 18F-FDG PET-CT imaging in TNM staging of NSCLC.Methods 18F-FDG PET-CT was performed in the 65 patients with NSCLC who were diagnosed by pathology.Blind interpretation was used to dignose the TNM staging.The sensitivity(Se),specificity(Sp),positive predict value(PPV) and negative predict value(NPV),coincidence rate and Kappa analysis were performed to evaluate the values of PET-CT and CT in diagnosing TNM staging of NSCLC.Results Compared with golden standard,the di
agnostic results of T staging among 65 NSCLC patients by CT and PET-CT were respectively as coincidence rate=72.31%,Kappa=0.46;coincidence rate=78.46%,Kappa=0.60;the diagnostic results of N staging among 58 NSCLC patients by CT and PET-CT were respectively as coincidence rate=74.14%,Kappa=0.50;coincidence rate = 87.94%,Kappa=0.78;the diagnostic results of lymph node metastasis by CT and PET-CT were respectively as Se=64.04%，Sp=77.53%，PPV=85.07%，NPV=51.88%，coincidence rate =68.54%，Kappa=0.37；Se=91.01%，Sp=83.15%，PPV=91.53%，NPV=82.22%，coincidence rate =88.39%，Kappa=0.74;the total detection rate and amount of metastasis by PET-CT were significantly higher than that by CT.Conclusion ¹⁸F-FDGPET-CT  has significant value on the diagnosis of  the TNM staging of NSCLC.

Key words: carcinoma, non-small cell lung , neoplasm staging, PET-CT, X-ray computerized tomography