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--></style></head><body lang=CS link=blue vlink="#954F72"><div class=WordSection1><p class=MsoNormal>Hi, my bad, taking it back (solved). Sorry.</p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Pavel</p><p class=MsoNormal><o:p> </o:p></p><div style='mso-element:para-border-div;border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm 0cm 0cm'><p class=MsoNormal style='border:none;padding:0cm'><b>Od: </b><a href="mailto:rtk-users-request@public.kitware.com">rtk-users-request@public.kitware.com</a><br><b>Odesláno:</b>čtvrtek 8. srpna 2019 8:47<br><b>Komu: </b><a href="mailto:rtk-users@public.kitware.com">rtk-users@public.kitware.com</a><br><b>Předmět: </b>Rtk-users Digest, Vol 83, Issue 2</p></div><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Send Rtk-users mailing list submissions to</p><p class=MsoNormal> rtk-users@public.kitware.com</p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>To subscribe or unsubscribe via the World Wide Web, visit</p><p class=MsoNormal> https://public.kitware.com/mailman/listinfo/rtk-users</p><p class=MsoNormal>or, via email, send a message with subject or body 'help' to</p><p class=MsoNormal> rtk-users-request@public.kitware.com</p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>You can reach the person managing the list at</p><p class=MsoNormal> rtk-users-owner@public.kitware.com</p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>When replying, please edit your Subject line so it is more specific</p><p class=MsoNormal>than "Re: Contents of Rtk-users digest..."</p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Today's Topics:</p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal> 1. RTK simulating projection from defined object (Shepp Logan</p><p class=MsoNormal> like txt file) issue (Pavel Kudrna)</p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>----------------------------------------------------------------------</p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Message: 1</p><p class=MsoNormal>Date: Thu, 8 Aug 2019 08:46:55 +0200</p><p class=MsoNormal>From: Pavel Kudrna <pavel.kudrna83@gmail.com></p><p class=MsoNormal>To: "rtk-users@public.kitware.com" <rtk-users@public.kitware.com></p><p class=MsoNormal>Subject: [Rtk-users] RTK simulating projection from defined object</p><p class=MsoNormal> (Shepp Logan like txt file) issue</p><p class=MsoNormal>Message-ID: <5d4bc55e.1c69fb81.ae618.5e3b@mx.google.com></p><p class=MsoNormal>Content-Type: text/plain; charset="utf-8"</p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Hi,</p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>I am prety new to RTK, but through I am learning with it I found a issue the is not clear to me. I followed the procedure from http://wiki.openrtk.org/index.php/RTK/Scripts/3DCG where I changed few things:</p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>1) I simplified the Shepp Logan file to just simple sphere (in attachement).</p><p class=MsoNormal>2) I generated projections (using output_xml.xml ? two whole gantry rotation in two diffferent y offsets) ? the xml has been generated via python script (most of it-in attachment) which is reproducing procedure described in http://www.openrtk.org/Doxygen/DocGeo3D.html</p><p class=MsoNormal>3) Then I looked at the projections.mha in VolView (too large to send, please see the screenshot bellow)</p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>My questions are 2:</p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>1) Why there is a shift in Y-Z quadrant in generated projections.mha? It should be perfectly alligned ? two of my colleagues has been so kind to check the procedure for me and found no mistake (the sinogram of sphere in the zero position(x=y=z=0) should be symetric perfectly) ? what I am doing wrong?</p><p class=MsoNormal>2) I simulated corrected projection byte by byte (into MHA) and then tried to use back-projection (rtkfdk) and Sart (rtksart)-you can see in output_xml.xml that the gantry angle is linear (not between -180? and 180? or between 0? and 360?), because when I put it into -180? and 180? it didn?t reconstruct anything properly ? why is it? It is not possible to use same angle value more then once in xml geometry file (even if it has different y shift of detector and source)?</p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Purpose of this testing is that I am going to reconstruct data from helical CT, but my first attemattempt failed and I am going step by step to find out hat is wrong in my procedure.</p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>I use docker version of RTK given by http://wiki.openrtk.org/index.php/RTK_wiki_help</p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Thank you?</p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Kind regards?</p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>p.</p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>-------------- next part --------------</p><p class=MsoNormal>An HTML attachment was scrubbed...</p><p class=MsoNormal>URL: <https://public.kitware.com/pipermail/rtk-users/attachments/20190808/c3f7a7fb/attachment.html></p><p class=MsoNormal>-------------- next part --------------</p><p class=MsoNormal>An embedded and charset-unspecified text was scrubbed...</p><p class=MsoNormal>Name: SheppLogan2.txt</p><p class=MsoNormal>URL: <https://public.kitware.com/pipermail/rtk-users/attachments/20190808/c3f7a7fb/attachment.txt></p><p class=MsoNormal>-------------- next part --------------</p><p class=MsoNormal>A non-text attachment was scrubbed...</p><p class=MsoNormal>Name: output_xml.xml</p><p class=MsoNormal>Type: application/xml</p><p class=MsoNormal>Size: 245302 bytes</p><p class=MsoNormal>Desc: not available</p><p class=MsoNormal>URL: <https://public.kitware.com/pipermail/rtk-users/attachments/20190808/c3f7a7fb/attachment.xml></p><p class=MsoNormal>-------------- next part --------------</p><p class=MsoNormal>A non-text attachment was scrubbed...</p><p class=MsoNormal>Name: geometry.py</p><p class=MsoNormal>Type: application/octet-stream</p><p class=MsoNormal>Size: 3387 bytes</p><p class=MsoNormal>Desc: not available</p><p class=MsoNormal>URL: <https://public.kitware.com/pipermail/rtk-users/attachments/20190808/c3f7a7fb/attachment.obj></p><p class=MsoNormal>-------------- next part --------------</p><p class=MsoNormal>A non-text attachment was scrubbed...</p><p class=MsoNormal>Name: 08FF49AC74FA430CA987CFB67043208B.png</p><p class=MsoNormal>Type: image/png</p><p class=MsoNormal>Size: 100598 bytes</p><p class=MsoNormal>Desc: not available</p><p class=MsoNormal>URL: <https://public.kitware.com/pipermail/rtk-users/attachments/20190808/c3f7a7fb/attachment.png></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>------------------------------</p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Subject: Digest Footer</p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>_______________________________________________</p><p class=MsoNormal>Rtk-users mailing list</p><p class=MsoNormal>Rtk-users@public.kitware.com</p><p class=MsoNormal>https://public.kitware.com/mailman/listinfo/rtk-users</p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>------------------------------</p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>End of Rtk-users Digest, Vol 83, Issue 2</p><p class=MsoNormal>****************************************</p><p class=MsoNormal><o:p> </o:p></p></div></body></html>