腰椎间盘膨出节段数字模型及三维可视化

背景：从生物力学入手研究腰椎间盘膨出意义重大。目的：探讨构建腰椎间盘膨出节段数字模型及三维可视化研究方法。方法：基于L3～4的16排螺旋CT连续断层114层二维图像,Mimics软件分别对腰椎骨性结构及各种软组织进行重建,并导入有限元分析软件进行模型验证。结果与结论：建立了L3～4间盘膨出节段三维数字模型,包括两个椎体、终板、纤维环、髓核及6种韧带,数字模型外形逼真,实体感强,可进行三维测量、复位、手术模拟以及输出用作CAD（计算机辅助设计）,RP（快速成型）及FEA（有限元分析）研究。说明薄层CT,Mimics软件阈值分割、区域增长使数字模型的建立更为精确、快捷,数字模型可被输出用于进一步研究。

Digital model and three-dimensional visualization of lumbar disk bulging segment

BACKGROUND：The biomechanical study of lumbar disk bulging is significant.OBJECTIVE：To investigate the digital model and three-dimensional visualization of lumbar disk bulging segment.METHODS：Bone structure and various soft tissues of the lumbar spine were reconstructed by Mimics software based on 16-slice spiral CT continuous two-dimensional 114 images of L3-4 segments.The models were verified by introduced finite element analysis software.RESULTS AND CONCLUSION：The established three-dimensional digital model of lumbar disk bulding segment included two vertebral bodies,endplate,annulus fibrosus,nucleus pulposus and six types of ligaments.The digital model could be used for research of three-dimensional measurement,reduction,surgical simulation,output as computer aided design,rapid prototyping,and finite element analysis based on its natural appearance and strong entity.It is indicated that thin-layer CT and Mimics software ensure more accurate and rapid establishment of digital model in order to facilitate further research.