Abstract: Objective To investigate the diagnostic value of magnetic resonance imaging（MRI）and computed to Mography（CT）applied alone or in combination in hepatocellular carcino ma（HCC）. Methods Forty-nine patients pathologically confirmed as HCCin our hospitalfro MAugust 2013 to Septem ber 2014 were enrolled to receive both CTscan and MRIscan within one week.In terms of CTand MRIused alone and in combination,analysis of sensitivity,specificity,accuracy and diagnostic efficacy on tu Mors am ong these patients were performed,respectively. Results There were 73 focuses in livers of 49 HCCpatients.In tu Mors less than 1cm in diameter,average sensitivity of CT,MRIand CT+MRIwere 46.00％,70.00％and 94.00％,respectively,which indicated that CT+MRIand MRIalone were More sensitive than CTalone（P=0.000 and 0.019,respectively）,and CT+MRIwas More sensitive than MRIalone（P=0.023）.In tu Mors of 1~3 cm in diameter,average sensitivity of CTscan（87.09％）and CT+MRI（98.39％）showed significantly different （P<0.05）,diagnostic accuracy of CT+MRIwas higher than both CTand MRIalone（P=0.015 and 0.027,respectively）,and area under the curve（AUC）of CT+MRIwas statistically different fro MCTand MRI（P=0.019 and 0.021,respectively）. Conclusion In diagnosis of HCC,CTcombined with MRIhas higher sensitivity,specificity and accuracy than CTand MRIalone,which is worth clinical pro Motion.

Key words: CT, MRI, Hepatocellular carcino ma, Diagnostic value