Analysis Of The Misdiagnosed Cases Of Lung Lesions By ¹⁸F-FDG PET/CT

Objective:Analysis of the misdiagnosed reasons of lung lesions in¹⁸F-FDG PET/CT.Methods:Retrospective analysis of 108 cases about lung lesions which have the pathological results,they are divided into true positive group?60 cases?,false positive group?20 cases?,true negative group?18cases?and false negative group?10 cases?according to the results of PET/CT and pathology.To find the main causes of misdiagnosis,it will be analyzed from the size of the lesions,SUVmax value,retention index,CT signs and clinical pathology.Results:Differences between true positive group and false positive group about the boundary conditions,retention index,presence of malignant signs of the lesions are not statistically significant?P>0.05?,but the differences about the size,density,SUVmax of the lesions are statistically significant?P<0.05?.Differences between true negative group and false negative group about the size,density,SUVmax value of the lesions are not statistically significant?P>0.05?,but the differences about the boundary,density and presence of malignant signs of the lesions are statistically significant?P<0.05?.The differences of the size,SUVmax value,CT signs of boundary and density between benign and malignant lesions are statistically significant?P<0.05?,the SUVmax value between adenocarcinoma and squamous carcinoma is statistically significant?P<0.05?.Conclusion:The SUVmax value,CT sign and the size of lesions are important to PET/CT in diagnosing lung lesion,the clinical application value of dual-time PET/CT remains to be discussed.It's easy to misdiagnose when the lesion shows atypical.Boundary conditions,retention index and presence of malignant signs are the main reasons when the PET/CT misdiagnose the benign lesion as malignant lesion.The size,SUVmax value and retention index are the main reasons when the PET/CT misdiagnose the malignant lesion as benign lesion.