Abstract: Objective To assess the value of magnetic resonance imaging(MRI)in mid-and long-term complication monitoring after liver transplantation.Methods Twenty-one recipients receiving orthotropic liver transplantation between Feb 2003 and May 2005 were enrolled in this study.FLASH T1-weighted,T2-weighted fast spin echo,T2-weighted fat suppression,dynamic gadolinium-enhanced,MR cholangiopancreatography(MRCP)and three-dimensional dynamic gadolinium-enhanced FISP MRA images were obtained.Results Of the 21 patients,bile duct complications were detected in all cases and liver arterial and venous complications in 8 cases.Liver cancer relapse occurred in 5 cases and allograft failure in 4.Conclusion MR imaging allows effective monitoring of mid-and long-term complications of liver transplantation,which provides valuable clues for their clinical treatment.