用MATLAB实现了CT平行束滤波反投影和扇束滤波反投影重建过程，效果良好，其中radon变换的方法采用步长法求解，较新颖。-CT achieved using MATLAB parallel beam filtered back projection and fan-beam filtered back projection reconstruction process, to good effect, in which radon transform method using step me

平行束的CT成像，对投影线经过的像素做线积分，积分得到的值保存为该角度下的权值 对一组数据 P 做 Radon 变换，即做正投影，会得到两个数据(Parallel beam CT imaging)

CT成像过程中，X射线平行入射，做两次变换可得CT图像。(In the process of CT imaging, CT images can be obtained by two times conversion of X ray parallel incidence.)

平行束滤波反投影算法的实现和几种常用滤波器的实现。(The implementation of parallel beam filter backprojection algorithm and the implementation of several common filters.)