骨骼CT图像的三维重建及其临床意义

目的：通过骨骼三维图像重建研究其方法和阐述其临床意义。方法：对正常的髋膝关节和髋关节中心性脱位各1例CT扫描图像进行三维图像重建，分4步进行，设定层厚，层距行CT扫描并将图像输入工作站中；锐化各CT图像层面的骨组织边界并建立文件；建立网格立体图，经修正后获得光滑三维骨骼图像；在三维图像上行测量和模拟匹配。结果：不同角度观察骨骼形态及其比邻关系和髓腔内三维形态，测量骨骼的长度，角度，弧度，面积和容积等，模拟假体在三维图像上行匹配，从中选择最佳假体，结论：骨骼的三维重建克服了X线片和CT图像的不足；可进行常规方法难以完成的解剖测量；可形象准确选取最佳型号的髋臼假体；可模拟再现手术过程；是将来计算机辅助手术的重要基础。

The 3D Reconstruction and Its Significance of Bone CT

Objective:To provide 3D bone imagines in all directions and to describe the method and the clinical significance by CT bone images reconstruction.Method:CT images of one normal hip and knee,one hip with central dislocation are reconstructed through four steps in image workstation.Result:The results show adjacent relations between bones and bone morphology in 3 dimensions.We can measures long,angle,arc,area and volume at the same time.We have simulated to choice matching prosthesis.Conclusion:The 3D images has more advantages than X ray and CT image.There is much significance that estimating the amount of bone graft,choosing prosthesis,making plan of operations should be done before operations.The 3D reconstruction is a basis of computer assistant surgical