寻优算法在CT系统参数标定中的应用研究

Application of Optimition Algorithm in Parameter Calibration of CT System

通过建立局部寻优模型确定最大接收信息方向,然后解得探测器单元间距.再利用单元间距,用局部寻优方法确定初始方向,建立小邻域寻优模型,依次求解X射线的方向,以及总的转动角度.最后,建立几何平移局部搜索模型,求解出旋转中心的坐标等系统参数.

In this paper,a local optimization model is established to determine the maximum receiving information direction,and then the unit spacing of the detector is obtained.Then,the element spacing is used to determine the initial direction by local optimization method,and a small neighborhood optimization model is established,to solve the direction of X ray and the total rotation angle in turn.Finally,a geometric translation local search model is established to solve the system parameters such as the coordinates of the rotating center.