Comprehensive MRI examination was performed for all patients,sequences including 2D T_1W and T_2W,2D MRCP,3D thin-section dynamic enhanced tri-phase scanning,and 2D T_1W enhanced scanning at equilibrium phase.

• 所有患者术前接受了上腹部MRI检查,包括2DT1WI、T2WI平扫,2D磁共振胰胆管成像(MRCP),3D薄层三期动态增强扫描和2DT1WI平衡期增强扫描。