Abstract:
Objective To evaluate the diagnostic value of PET/CT in single space-occupying lesion of the liver hepatic disease.
Methods Data of 177 patients from Tianjin Medical University Cancer Institute and Hospital between March 2012 and September 2017 with a single hepatic space-occupying lesion who had undergone 18F-FDG PET/CT were collected.CT values and the long and short diameters were measured in PACS system.A post-processing workstation was employed, and PETVCAR software was used to automatically measure the standardized uptake value (SUV) of the focal and the normal liver tissue.Afterward, T (SUV of the focal)/N (SUV of the normal liver tissue) ratios were calculated.Then, the diagnostic value of various parameters for different pathological types was analyzed.The correlation between two continuous variables was calculated using Pearson analysis.
Results The long and short diameters of the primary hepatic carcinoma were significantly larger than those of metastatic lesions (P< 0.05).The positive rates of hepatocellular carcinoma (HCC), intrahepatic cholangiocarcinoma (ICC), and metastases were 67.6%, 95.2%, and 98.7%, respectively.All metabolic parameters of HCC were significantly lower than those of the other pathological types of liver cancer or metastases (P< 0.05).The AUCs for diagnosis of ICC and metastases were higher than 0.5, but there was no statistical difference between the AUCs of different SUVs.Moreover, SUVmax was related to lesion size (r=0.535, P< 0.001).
Conclusions 18F-FDG PET/CT has a high positive predictive value and effective diagnostic function for ICC and metastasis, and the diagnostic efficacy for both is higher than that for HCC.