Dual-phase helical CT could delineate small pancreatic carcinoma clearly and afford mord information for the diagnosis and assessment of respectability of the lesion,the pancreas-tumor contrast was much better in PP than in PVP.

• 胰腺期胰腺与肿瘤密度对比较门脉期更显著,螺旋CT双期增强扫描有利于小胰腺癌检出和正确术前评估。