立体定向手术脑内靶点计算方法的改进

目的 推导并验证适合CRW定向系统靶点计算的计算机应用程序。方法 根据CRW定向仪的定位原理，将靶点与定位架中点坐标的换算关系编制成计算机应用程序，应用计算机程序代替屏幕测量法计算靶点坐标，并将计算结果与屏幕测量法的计算结果进行对比，判定计算机辅助算法的准确性。结果 与屏幕测量法经统计学对比分析，说明改进算法计算靶点坐标准确，且节省时间；分析得出计算机辅助算法较屏幕测量法计算误差更小。结论 屏幕测量法坐标计算过程繁琐，易受人为因素影响导致误差加大，且耗时较长；计算机辅助算法简便实用、计算准确。

Improvement for computing the coordinates of the targets in stereotactic operations

Objective To design and test a program for computing the coordinates of the targets in stereotactic operations.Methods Using geometric principal,we deduced the conversion formulas between the coordinates of the targets and the midpoint of the stereotactic frame.We computed the coordinates of the targets with the improved program,and compared it with the original method to test the accuracy of the program.Results The improved program was very accurate and causes fewer error.Conclusion Computer aided algorithm is simple,practical and accurate.