信息与计算科学-CT系统参数标定论文

CT 系统参数标定摘要 如果 CT 成像系统不协调，会导致极大的误差，更有甚者会打乱成像质量，所以我们需要评价并科学测算几何参数。从吸收结果可知待测的未知物大约位置，同时建立坐标系，并引入相关思考角度求解。就所得的直观信息，与理论者进行结合并总结。利用探测器极限逼近时的特殊方法，可以看到过同一点所扫过的射线，与过原点的光束，判断位置，得出所求点的坐标。可知距离为 0.2767mm，坐标（-9.2233,6.0182）,范围在 119.7305°至 298.7164°之间。利用上述所得目标数组，灵活操作 radon 变换，并发现类似于傅里叶变换可以达到所给系统的信息这个目标。从而隔膜度为 2.0751,图像类似一个外星人的头部。关键词 CT 系统 最小二乘原理 radon 变换 radon 逆变换CT system parameter calibrationAbstract If the CT imaging system is not coordinated, it will lead to great errors, and even disrupt the imaging quality, so we need to evaluate and measure the geometric parameters scientifically.From the absorption results, we can know the approximate location of the unknown object to be measured. At the same time, we establish the coordinate system and introduce the relevant thinking angle to solve it. Combine with the theorists and summarize the intuitional information. By using the special method of limit approximation of detector, we can see the ray passing through the same point and the beam passing through the origin, judge the position and get the coordinates of the point. It can be seen that the distance is 0.2767mm, the coordinates (- 9.2233, 6.0182), and the range is between 119.7305 ° and 298.7164 °.Using the target array, we can operate Radon transform flexibly, and find that the information of the given system can be achieved similar to Fourier transform. So the diaphragm is 2.0751, which is similar to the head of an alien.Key words CT system least square principle Radon transform Radon inverse transform目...