There appear are a variety of artifacts in the shepp-logan demo.
There are aliasing artifacts. We should double check that the forward projector is properly implemented.
The the top and bottom of the phantom have artifacts. These may be cone beam artifacts due to the large cone angle, but we should double check to make sure this is correct.
The phantom seems to not fill up the ROR. We should double check that it is properly filling up the ROI.
There appear are a variety of artifacts in the shepp-logan demo.