目的　由二维CT图像重建肝脏三维模型 ,使医生能从各方向观察肝脏形状、病变情况 ,并可计算肝脏体积 ,可辅助医生进行临床诊断及手术规划。方法　对肝脏CT扫描图像进行半自动轮廓数据点提取 ;再对所得数据进行平滑处理 ;最后用双三次B 样条曲面重构肝脏曲面。结果　对 10余例患者的CT片进行肝脏三维重建 ,所得肝脏三维模型形状、体积计算精度均能满足诊断要求。结论　本工作对诊断、教学及手术规划有重要意义。 Objective To reconstruct the three-dimensional model of liver from two-dimensional CT images so that doctors can observe the shape and lesion of liver in all directions and calculate the volume of liver to assist doctors in clinical diagnosis and surgical planning. Methods The semi-automatic contour data points were extracted from the liver CT scan images. The data were then smoothed. Finally, bicubic B-spline surfaces were used to reconstruct the liver surface. Results Three-dimensional reconstructions of the liver were performed on more than 10 cases of CT images. The shape and volume calculation accuracy of the three-dimensional model of the liver obtained by this study could meet the diagnostic requirements. Conclusion The work of diagnosis, teaching and surgical planning is of great significance.