Abstract: Objective To investigate the diagnostic value of spiral CT,CT spectroscopy and MRI in diagnosis of patients with primary liver cancer. Methods Spiral CT,CT spectroscopy and MRI were carried out in 47 patients with liver-occupying foci. Results Out of the 47 patients,EDS CT set up the diagnosis in 36 patients （76.59%）,conventional CT found 30 patients （63.83%）,and MRI found 34 cases （72.34%,P>0.05）;Out of 8 patients with bile duct carcinoma,MRI found 7 patients,EDS CT and spiral CT found 4 cases,respectively;The sensitivity of spectrum CT scan and MRI were 92.3% and 89.2%,respectively,much higher than 76.6% by conventional CT （P<0.05）,and the accuracy of EDS CT was 72.5%,and that of MRI was 69.7%,much higher than 50.0% by conventional CT（P<0.05）;In less than 1 cm of liver cancer,sensitivities of conventional CT,CT and MRI scans were 53.13%,90.63% and 90.63%,（P<0.005）. Conclusion The diagnosis of primary liver cancer by EDS CT and MRI is superior to that by spiral CT,and MRI is good at finding cholangiocarcinoma.

Key words: Hepatocellular carcinoma, Spectrum CT, Spiral CT, MRI, diagnosis