脊柱CT图像的椎弓根螺钉置入自动路径规划方法

Automatic Path Planning Method for Pedicle Screw Placement in Spine CT Images

针对脊柱融合术中手术时间长、椎弓根螺钉置入成功率低的问题,通过对LEE法的改进得到一种椎弓根螺钉自动路径术前规划方法。该方法首先在三维空间中选取可能的螺钉入射点及终点组成路径集,然后通过错误路径排除、安全性评估、置入深度评估得到螺钉置入的最优路径。最后确定最优路径的入射角。通过实验表明,本方法较LEE法具有更好的钉占比,能够使椎弓根螺钉椎体后拥有更好的力学特性。同时,得到的入射点参数能够为手术的进行提供一个理论依据。

In order to solve the problem of long operation time and low success rate of pedicle screw placement in spinal fusion,a method for automatic planning of pedicle screw automatic path was obtained by the improvement of LEE method.With this method,the possible screw insertion point and the end point are selected in the three-dimensional space,and then the optimal path of the screw placement is obtained through the error path exclusion,safety evaluation,and the depth of insertion.Finally,the incident angle of the optimal path is determined.The experimental results show that the proposed method is better than the LEE method,which can make the pedicle screws have better mechanical properties.At the same time,the parameters of the incident point can provide a theoretical basis for the operation.