腰椎间盘膨出节段数字模型及三维可视

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.