摘要目的 探讨计算机辅助设计(CAD)和计算机辅助工程(CAE)等相关技术在臀部联体儿分离手术中的作用.方法 获取臀部联体患儿的CT数据,使用Mimics软件进行三维重建,得到三维数据模型,利用快速成型设备制造出联体儿的脊柱和皮肤的三维实体模型;使用AutoCAD软件对连接部MRI图像资料进行硬膜囊面积和周长的测量.结果 三维实体模型真实的反映了联体儿的皮肤和脊柱的情况,其被应用于术前讨论、皮瓣设计、模拟手术、术前谈话过程中;连接部位的硬膜囊周径和面积大于连接近端两分离的硬膜囊周径和面积之和,预计硬膜囊可直接缝合,术中的情况与软件计算结果 完全相符.结论 将CAD和CAM技术用于联体儿分离手术的术前计划,为手术顺利进行和成功分离提供了很大的帮助.

abstractsObjectives To explore the effect of CAD and CAE related technique in separation of Pygopagus Conjoined Twins.Methods CT images of Pygopagus conjoined twins were obtained and reconstructed in three-dimensional by Mimics software. 3D entity model of skin and spine of conjoined twins were made by fast plastic technique and equipment according to 3D data model. The circumference and area of fused and independent dural sac were measured by software of AutoCAD.Results The entity model is real reflection of skin and spine of Pygopagus. It was used in the procedures of discussion, sham operation, skin flap design and informed consent. In the measure of MRI, the circumference and area of fused dural sac was more than of independent dural sac, that is to say, the defect of dural sac can be repaired by direct suture. The intraoperative finding match with imaging measure results.Conclusions The application of CAD and CAE in the procedure of preoperative plan have gave big help to successful separation of Pygopagus Conjoined Twins.