摘要
介绍了激光全息 散斑法用于人体腰椎损伤后,内固定装置稳定性生物力学实验。分析了对椎间盘表面位移和变形的测量。对标本制备、加载装置、光路系统、实验方案设计及实验过程均进行了介绍。激光全息 散斑法具有精度高、全场、非接触测量的特点,实验结果表明,在模型模拟腰椎生理运动的大变形过程中,能够测得模型在不同运动位置时椎间盘表面发生的微小三维位移,并由位移求出椎间盘的变形,从而为不同内固定方式的稳定性对比分析提供依据。
Application experiments of holographical-speckle method for intervertebral disc measurement of offset variable and metamorphosis in orientation of the lumbar surface are performed. The instruction of specimen making, loading device, design of beam path and process of experiment are introduced. The results of experiment indicate that holographical-speckle method can obtain three dimensional (3D) offset variable field of intervertebral disc, and metamorphosis can be got by calculation. This method has high accuracy, full-field and noncontact. The results of experiment offer data for contrasting the stabilization of different spinal fixation method.
出处
《中国激光》
EI
CAS
CSCD
北大核心
2005年第2期257-261,共5页
Chinese Journal of Lasers
关键词
全息
生物力学
散斑
椎间盘
Biomechanics
Data processing
Error analysis
Optical systems
Speckle
Stability
