This code shows how to use radon, iradon, fanbeam, and ifanbeam to form projections from a sample image and then reconstruct the image from the projections.

进行CT成像，完成项目的计算与使用，CT成像的iradon变换(Perform CT imaging, complete the calculation and use of the project, and perform the iradon transformation of the CT imaging)

对于iradon的普通用法 ，很简单，但是不是很适合普片的举证(For normal usage iradon, very simple, but is not very suitable for general piece of proof)