Objective: To evaluate the value of magnetic resonance diffusion weighted imaging( MRI-DWI) in the differential diagnosis of tumor necrosis and residual after hepatocellular carcinoma( HCC) cryosurgery. Methods:The data of 30 lesions of 27 patients with HCC who underwent cryosurgery in our hospital were examined by conventional MRI,T_1 WI,T_2WI,DWI and dynamic contrast-enhanced. The changes of MRI signal before and after cryosurgery were observed. The correlation between general characteristics of HCC and A...