<div dir="ltr"><div><div>Hi Dennis,<br></div>You can do a helical trajectory and I have used our iterative reconstruction tools in <a href="http://www.creatis.insa-lyon.fr/~srit/biblio/clackdoyle2017.pdf">this work</a> to do helical reconstructions. It works. However, RTK does not have any filtered backprojection reconstruction for helical CT.</div><div>You can check <a href="http://dx.doi.org/10.1118/1.4941953">FreeCT</a>, I think that what it does.</div>Simon<br></div><div class="gmail_extra"><br><div class="gmail_quote">On Wed, Dec 20, 2017 at 12:51 PM, Dennis Brandborg Nielsen <span dir="ltr"><<a href="mailto:dbn@teknologisk.dk" target="_blank">dbn@teknologisk.dk</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">





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<p class="MsoNormal" style="margin-bottom:8.0pt"><span style="font-family:"Verdana",sans-serif;color:black">Dear Simon..
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<p class="MsoNormal" style="margin-bottom:8.0pt"><span style="font-family:"Verdana",sans-serif;color:black">I have tryied post a question on the rtk-user mailing list.
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<p class="MsoNormal" style="margin-bottom:8.0pt;border:none;padding:0cm"><span style="font-family:"Verdana",sans-serif;color:black">However I get some mail delevery errors. And hope you would take the time to answer a shoort question..
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<p class="MsoNormal" style="margin-bottom:8.0pt"><span style="font-family:"Verdana",sans-serif;color:black">I am new to CT reconstruction - Before I start to get familiar with RTK I have an question.<u></u><u></u></span></p>
<p class="MsoNormal" style="margin-bottom:8.0pt"><span style="font-family:"Verdana",sans-serif;color:black">At the wiki-help-site is says that is possible to do "fast circular cone-beam CT reconstruction" does this mean that RCT can do reconstruction of helical
 cone-beam CT reconstruction?  Or is this only possible for sequential scanning/step-and-shoot.
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<p class="MsoNormal" style="margin-bottom:8.0pt;border:none;padding:0cm"><span style="font-family:"Verdana",sans-serif;color:black">Are there any other possible reconstructions-tools for helical cone-beam reconstruction that you would recommend?.
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<p class="MsoNormal" style="margin-bottom:8.0pt"><span style="font-family:"Verdana",sans-serif;color:black">Kind regards<span class="HOEnZb"><font color="#888888"><u></u><u></u></font></span></span></p><span class="HOEnZb"><font color="#888888">
<p class="MsoNormal" style="margin-bottom:8.0pt"><span style="font-family:"Verdana",sans-serif;color:black">Dennis<u></u><u></u></span></p>
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