CT demo

代码说明：

This software is designed to aid anyone new to the field of computed tomography (CT). The acquisition and reconstruction of CT images can be a mysterious topic for the uninitiated. This CT demo software gives the user a sense of the steps involved in producing CT images for analyst review.  Run the software in the matlab environment by running the CT_demo script. The steps can be understood by the following steps, as shown on the GUI:  1. Input image  Select an image which is the "true object" for the CT projection acquisition. We will simulate an x-ray acquisition by taking projections over this image.  To add images, place them in the "images" folder. The software recognizes *.tif, *.jpg, and *.png file