The regular ifanbeam function discards part of the sinogram data generated by fanbeam : it keeps only a 180° + fanAngle angular range, and reconstructs like a short scan.
This was mentioned and proved by a piece of test code on the forum http://www.mathworks.fr/matlabcentral/answers/53299-can-ifanbeam-use-all-the-sinogram-generated-by-fanbeam
This modified version contains just a few tweaks, which make ifanbeam use all the data and exploit its redundancy.
Cyril Mory (2021). ifanbeam using the whole sinogram (https://www.mathworks.com/matlabcentral/fileexchange/39332-ifanbeam-using-the-whole-sinogram), MATLAB Central File Exchange. Retrieved .
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