iradon and radon function

Hello! I'm quite new to the idea of Radon and Iradon functions. Therefore i was not sure if i did them correctly or not.

i have attached my matlab code for iradon and radon and two images.

i'm not getting the correct images. could someone have a look at them place?

Thank you

p.s for the sinogram.m you can directly load it into your workspace by double clicking on it