Abstract: Objective To explore and analysis the values of multislice computer tomography (MSCT) combined with enhanced helical CT scan in differentiating liver tumor types in physical examination patients. Methods From September 2016 to December 2018, a total of 80 cases of liver tumors diagnosed and treated in 32261 Army Radiology Department were selected as the research subjects. All patients were given MSCT combined with helical CT enhanced scanning, and the imaging features were recorded and the diagnostic value were judged. Results In the 80 patients, 43 cases were pathologically diagnosed as benign liver tumors (benign tumor group), and 37 cases were malignant liver tumors (malignant tumor group). The proportion of CT tumor hemorrhage, necrosis and cystic degeneration and calcification in the malignant tumor group(56.76%,59.46%,64.86%)were significantly higher than that in the benign tumor group(13.95%,9.30%,11.62%) (P<0.05). The CT value of the CT enhanced scan in the malignant tumor groupof arterial phase, portal phase, equilibrium phase were significantly higher than that in the benign tumor group (P<0.05). The CT enhancement mode of malignant tumor group were mostly heterogeneous enhancement(n=32), while benign tumor groupwere mostly homogeneous enhancement(n=40), and there were significant difference in contrast (P<0.05). MSCT combined with helical CT enhanced scanning were judged to be 42 cases of benign liver tumors and 38 cases of liver malignant tumors. The sensitivity and specificity of MSCT combined with helical CT enhanced scanning for differential diagnosis of benign and malignant liver tumors were 97.67% and 100.00%. The receiver operating characteristic (ROC) curve showed that the maximum area under the curve of MSCT combined with helical CT enhancement for predicting benign and malignant liver tumors was 0.719. Conclusion Morphological features, enhancement features, and CT values of benign and malignant liver tumors can be used as differential parameters. MSCT combined with helical CT enhanced scanning has important significance in the differential diagnosis of benign and malignant liver tumors, and has clinical application value.

Key words: multislice spiral CT, enhanced CT scan, liver tumor, benign and malignant, diagnostic value, sensitivity, specificity