<div dir="ltr"><div><div>Thanks dear Cyril<br></div>But I have read the grass' paper titled "3D cone-beam CT reconstruction for circular trajectories" and Turbell have explained this method ( T-FDK) in his PhD thesis "Cone-Beam Reconstruction Using Filtered Backprojection" . I want to implement DFR in 3D cbct, so I need rebinning it. Grass have done this in his paper. I would be happy if you say your idea about it.<br><br></div>Best<br></div><div class="gmail_extra"><br><div class="gmail_quote">On Mon, Dec 28, 2015 at 1:23 PM, Cyril Mory <span dir="ltr"><<a href="mailto:cyril.mory@uclouvain.be" target="_blank">cyril.mory@uclouvain.be</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div text="#000000" bgcolor="#FFFFFF">
Hi Niloufar,<br>
<br>
There is no such program in RTK, and you won't find it anywhere
else. What you are asking for is impossible. <br>
In 2D fan-beam, rays can be sorted into groups of parallel rays,
because they are indeed parallel to each other.<br>
In 3D cone beam along a circular trajectory, the rays outside the
central slice cannot be sorted into groups of parallel rays : they
just aren't parallel. <br>
<br>
Hope that helps.<br>
<br>
PS : The more I think about it, the more I think there must be some
connection between the possibility of re-binning to parallel
projections and Tuy's data sufficiency condition. If someone has a
clear understanding of this area, I'm curious about it.<div><div class="h5"><br>
<br>
<div>On 12/18/2015 08:43 PM, niloufar
teyfouri wrote:<br>
</div>
</div></div><blockquote type="cite"><div><div class="h5">
<div dir="ltr">
<div>
<div>Hi Dear RTK users<br>
<br>
</div>
Do you know a program in RTK for rebinning the 3D circular
cone beam ct projections on the flat panel detector to
parallel beam projections?<br>
<br>
</div>
I would be appreciate, If you could help me.</div>
<br>
<fieldset></fieldset>
<br>
</div></div><pre>_______________________________________________
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</blockquote>
<br>
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</blockquote></div><br><br clear="all"><br>-- <br><div class="gmail_signature"><div dir="ltr"><div dir="ltr"><font face=""><font size="1"><b style="color:rgb(0,51,51);font-family:arial,helvetica,sans-serif"><span style="background-color:rgb(255,255,255)">Niloufar.Teyfouri, <br>PhD candidate of biomedical engineering,<br></span></b></font></font><font size="1"><b style="color:rgb(0,153,0);font-family:arial,helvetica,sans-serif"><span style="color:rgb(0,51,51)"><font face="">Isfahan University of Medical Sciences,</font></span></b></font><font size="1"><span style="color:rgb(0,51,51);font-family:arial,helvetica,sans-serif"><font face=""> Isfahan, Iran<b>.</b></font></span><b style="color:rgb(0,153,0);font-family:arial,helvetica,sans-serif"><span style="color:rgb(0,51,51)"></span></b></font><font size="1"><b style="color:rgb(0,153,0);font-family:arial,helvetica,sans-serif"><span style="color:rgb(0,51,51)"></span><a style="color:rgb(51,51,255)" href="http://misp.mui.ac.ir/" rel="nofollow" target="_blank"><span></span></a></b></font><font size="1"><b style="color:rgb(0,153,0);font-family:arial,helvetica,sans-serif"><span style="background-color:rgb(255,255,255)"></span><font face=""><span style="color:rgb(0,51,51);background-color:rgb(255,255,255)"></span><span style="color:rgb(0,51,51);background-color:rgb(255,255,255)"></span><br style="color:rgb(0,51,51);background-color:rgb(255,255,255)"><span style="background-color:rgb(255,255,255)"><span style="color:rgb(0,51,51)">email</span>:<a style="color:rgb(0,0,153)" href="mailto:bioniloofar@yahoo.com" rel="nofollow" target="_blank">bioniloofar@yahoo.com</a></span></font></b></font></div></div></div>
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