BACKGROUND: Pedicle screw which passes through the three columns and has three-dimensional correction function, which has quickly become the standard posterior spinal internal fixation.
背景：椎弓根螺钉贯穿脊柱前中后三柱，具有三维矫正作用，已成为标准的脊椎后路内固定方法。
These give a three-dimensional view, showing the sutures in detail, and can guide surgical correction.
这些提供一个三维立体的看法，显示了缝线在详细，并能指导手术矫正。
Based on the INS error correction by quasi-three dimensional model, the method of the combination of camera imaging system with SINS to deduce the measurement matrix was utilized.
文中基于准三维模型对惯导系统误差校正的思想，利用摄像机成像系统和捷联惯导系统（SINS）相结合的方法，着重对量测矩阵进行推导。
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