<div dir="ltr">Hi Simon,<div><br></div><div style>I have a question regarding practical implementation of SART. As far as I know, one needs to find the ray-sum coefficient w_ij by bilinear interpolations to simulate the forward projection process. Then, the backprojection process is done in an algebraic manner using the w_ij we found according to the SART formula. However, according to a few open source codes I've found, as well as rtksart, I realize in many cases people simply use a traditional backprojection (with or without ramp filter) for the backprojection step. Is there any reference, or justification, that this is equivalent, or approximately equivalent, to the actual SART? Thanks!</div>
<div style><br></div><div style>Not sure if I've described the question clear enough. Please let me know if it doesn't make much sense and I'll try to elaborate a bit more. Thanks :)</div><div style><br></div>
<div style>Cheers,</div><div style>Andy</div></div>