64-Multiple Spiral CT Manifestations of Normal Duodenal Papilla

Objective To evaluate the 64-multiple spiral CT manifestations of the normal duodenal papilla,and to improve the CT anatomical knowledge.Materials and Methods Seventy cases with normal duodenal papilla underwent 64-multiple spiral CT examination.CT features were retrospectively reviewed with particular attention to the location,size,shape,enhancement patterns.Results The average length diameter and width diameter of the major duodenal papilla were(7.3±1.4)mm and(6.5±1.8)mm in axial image.Most of the duodenal papilla had round shape(52.9%,37/70).It was mainly located in the middle or lower third segment of the descending duodenum(97.1%,68/70).The optimal visibility of papilla was on arterial phase(84.3%,59/70).The target sign was well identified only on arterial phase images(71.4%,50/70).Conclusion 64-MSCT can clearly demonstrate the normal duodenal papilla and surrounding structures,and may provide valuable information for the diagnosis and treatment of the diseases in this region.