Abstract: Objective To investigate the application of computed tomography（CT） and magnetic resonance imaging （MRI） in diagnosis of agenesis of right hepatic lobe. Method Twenty-four patients with agenesis of right hepatic lobe were recruited in our hospital,and they were all checked-up by CT and MRI. Results Our series included eight men,and sixteen women,with the average age of（60.7±3.2） yr-old;the agenesis of right hepatic lobe were diagnosed by MRI in 6,by CT in 18,and by both in 4;the imaging showed shrunk volume of right lobe,narrow portal vein and even lost its branches;left hepatic lobe enlarged in 18,and with normal left hepatic lobe in 6;hepatic caudate lobe shrank in 3,and enlarged in 15;extrahepatic bile duct stone in 14,dislocation of gall bladder in 12;all patients had cholangiectasis,12 had splenomegaly,and 9 had neoplasm. Conclusion The application of CT and MR imaging for the diagnosis of right lobe dysplasia have important clinical significance.

Key words: Agenesis of the right hepatic lobe, Computed tomography, Magnetic resonance, Diagnosis