CT拍摄拍摄一周，步进1度，360张投影图像，使用S-L滤波，滤波反投影FBP算法进行二维断面重建(CT filming for a week, step 1 degrees, 360 projection images, using S-L filter, filter back projection FBP algorithm for two-dimensional section reconstruction)

实现CT Shepp-logan头模型的平行束投影及反投影以及扇束等角的投影以及重排方法(Parallel projection and backprojection and fan beam isometric projection and rearrangement method for CT Shepp-logan head model are implemented.)