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.)