MRI diagnosis of liver grafts complications after liver transplantation

Objective To observe the value of MRI in the diagnosis of liver grafts complications after orthotopic liver transplantation.Methods A total of 56 patients after orthotopic liver transplantation underwent MR examination using Fiesta,Dual-Echo,FSPGR,FS FSE RT and DWI.The dynamic contrast-enhanced liver acquisition with volume acceleration(LAVA) was performed,and imaging findings after liver transplantation were analyzed.Results MRI revealed hepatic hyperperfusion in arterial phase(n=15),liver tumor recurrence(n=9) with the tumor thrombus in the inferior vena cava and portal vein in 3 cases.There were localized liver ischemia and necrosis(n=2),biliary abscess(n=2),inflammation around the liver(n=2),focal hematoma foci(n=2),localized(n=2) and diffuse fatty infiltration of the liver(n=1),hepatic congestion(n=1) after living-donor liver transplantation.In addition,liver eosinophilic granuloma(n=1) and undifferentiated embryonal sarcoma of the liver(n=1) were found.Conclusion MRI can accurately demonstrate all kinds of liver grafts complications after orthotopic liver transplantation,which is of important value in the guidance of clinical diagnosis and formulating treatment plan.