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</o:shapelayout></xml><![endif]--></head><body lang=ZH-CN link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span lang=EN-US style='font-size:10.5pt;font-family:"Calibri",sans-serif;color:#1F497D'>Dear Simon,<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:10.5pt;font-family:"Calibri",sans-serif;color:#1F497D'>Thanks for your reply for my question!<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:10.5pt;font-family:"Calibri",sans-serif;color:#1F497D'>I solved this problem under your reminding and there is no longer display the error message.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:10.5pt;font-family:"Calibri",sans-serif;color:#1F497D'>I set the origin point as (-0.5*0.254*767,-0.5*0.254*959) to make the origin coordinate at the center of the projection.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:10.5pt;font-family:"Calibri",sans-serif;color:#1F497D'>Also, I adjust the geometry calibration to fit your projection model but still can’t acquire the right image with my projection data.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:10.5pt;font-family:"Calibri",sans-serif;color:#1F497D'>I attached my key code(just the version overwrite rtkfdk.cxx)and hope that you can give me some advice.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:10.5pt;font-family:"Calibri",sans-serif;color:#1F497D'>Freyman li<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:10.5pt;font-family:"Calibri",sans-serif;color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><b><span style='font-size:11.0pt;font-family:"微软雅黑",sans-serif'>发件人<span lang=EN-US>:</span></span></b><span lang=EN-US style='font-size:11.0pt;font-family:"微软雅黑",sans-serif'> simon.rit@gmail.com [mailto:simon.rit@gmail.com] </span><b><span style='font-size:11.0pt;font-family:"微软雅黑",sans-serif'>代表 </span></b><span lang=EN-US style='font-size:11.0pt;font-family:"微软雅黑",sans-serif'>Simon Rit<br></span><b><span style='font-size:11.0pt;font-family:"微软雅黑",sans-serif'>发送时间<span lang=EN-US>:</span></span></b><span lang=EN-US style='font-size:11.0pt;font-family:"微软雅黑",sans-serif'> 2015</span><span style='font-size:11.0pt;font-family:"微软雅黑",sans-serif'>年<span lang=EN-US>12</span>月<span lang=EN-US>29</span>日<span lang=EN-US> 6:26<br></span><b>收件人<span lang=EN-US>:</span></b><span lang=EN-US> Freyman li<br></span><b>抄送<span lang=EN-US>:</span></b><span lang=EN-US> louie L; rtk-users@public.kitware.com<br></span><b>主题<span lang=EN-US>:</span></b><span lang=EN-US> Re: [Rtk-users] </span>答复<span lang=EN-US>: Rtk Detector Displacemets<o:p></o:p></span></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><div><div><div><p class=MsoNormal><span lang=EN-US>Dear Freyman li,<o:p></o:p></span></p></div><p class=MsoNormal><span lang=EN-US>Have you solved your problem ? If not, my guess would be that you have not set the origin of your projections correctly. Where does your calibration assume the location of point (0,0) in your projections? Since you have very small X projection offsets, it probably assumes that it's at the center of the projection so you must set the origin, i.e., the coordinate of the first pixel, at (0.5*0.254*767, 0.5*0.254*959). If you don't do that, rtkfdk detects a large offset that it cannot correct for.<o:p></o:p></span></p></div><p class=MsoNormal><span lang=EN-US>Simon<o:p></o:p></span></p></div><div><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><div><p class=MsoNormal><span lang=EN-US>On Mon, Dec 14, 2015 at 6:32 AM, Freyman li <<a href="mailto:lihanwei_1500@126.com" target="_blank">lihanwei_1500@126.com</a>> wrote:<o:p></o:p></span></p><blockquote style='border:none;border-left:solid #CCCCCC 1.0pt;padding:0cm 0cm 0cm 6.0pt;margin-left:4.8pt;margin-right:0cm'><div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span lang=EN-US style='font-size:10.5pt'>Thanks for your help! I attached the geometry settings to this email. And my detector size is 768*960 with a pixel size 0.254mm.</span><span lang=EN-US><o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span lang=EN-US style='font-size:10.5pt'> </span><span lang=EN-US><o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span lang=EN-US style='font-size:10.5pt;color:#1F497D'> </span><span lang=EN-US><o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span lang=EN-US style='font-size:10.5pt;color:#1F497D'> </span><span lang=EN-US><o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span lang=EN-US style='font-size:10.5pt;color:#1F497D'> </span><span lang=EN-US><o:p></o:p></span></p><div><div style='border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm 0cm 0cm'><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><b>发件人</b><b><span lang=EN-US style='font-family:"Arial",sans-serif'>:</span></b><span lang=EN-US style='font-family:"Arial",sans-serif'> louie L [mailto:<a href="mailto:ghostcz@hotmail.com" target="_blank">ghostcz@hotmail.com</a>] <br></span><b>发送时间</b><b><span lang=EN-US style='font-family:"Arial",sans-serif'>:</span></b><span lang=EN-US style='font-family:"Arial",sans-serif'> 2015</span>年<span lang=EN-US style='font-family:"Arial",sans-serif'>12</span>月<span lang=EN-US style='font-family:"Arial",sans-serif'>14</span>日<span lang=EN-US style='font-family:"Arial",sans-serif'> 11:38<br></span><b>收件人</b><b><span lang=EN-US style='font-family:"Arial",sans-serif'>:</span></b><span lang=EN-US style='font-family:"Arial",sans-serif'> Freyman li; <a href="mailto:rtk-users@public.kitware.com" target="_blank">rtk-users@public.kitware.com</a><br></span><b>主题</b><b><span lang=EN-US style='font-family:"Arial",sans-serif'>:</span></b><span lang=EN-US style='font-family:"Arial",sans-serif'> RE: [Rtk-users] Rtk Detector Displacemets</span><span lang=EN-US><o:p></o:p></span></p></div></div><div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span lang=EN-US> <o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span lang=EN-US> <o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span lang=EN-US> <o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span lang=EN-US>Sent from <a href="http://go.microsoft.com/fwlink/?LinkId=550986" target="_blank">Mail</a> for Windows 10<o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span lang=EN-US style='font-family:"Times New Roman",serif'> </span><span lang=EN-US><o:p></o:p></span></p><div style='border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm 0cm 0cm'><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span lang=EN-US><br><b>From: </b><a href="mailto:ghostcz@hotmail.com" target="_blank">louie L</a><br><b>Sent: </b>Monday, December 14, 2015 04:38<br><b>To: </b><a href="mailto:lihanwei_1500@126.com" target="_blank">Freyman li</a><br><b>Subject: </b>RE: [Rtk-users] Rtk Detector Displacemets<o:p></o:p></span></p></div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span lang=EN-US style='font-family:"Times New Roman",serif'> </span><span lang=EN-US><o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span lang=EN-US>Hi,<o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span lang=EN-US> <o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span lang=EN-US>Can you post your geometry file to the mail list? Your problem sounds like a result of wrong geometry settings.<o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span lang=EN-US> <o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span lang=EN-US>Best regards,<o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span lang=EN-US>Louie<o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span lang=EN-US> <o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span lang=EN-US>Sent from <a href="http://go.microsoft.com/fwlink/?LinkId=550986" target="_blank">Mail</a> for Windows 10<o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span lang=EN-US style='font-family:"Times New Roman",serif'> </span><span lang=EN-US><o:p></o:p></span></p><div style='border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm 0cm 0cm'><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span lang=EN-US><br><b>From: </b><a href="mailto:lihanwei_1500@126.com" target="_blank">Freyman li</a><br><b>Sent: </b>Monday, December 14, 2015 04:25<br><b>To: </b><a href="mailto:Rtk-users@public.kitware.com" target="_blank">Rtk-users@public.kitware.com</a><br><b>Cc: </b><a href="mailto:rtk-users@openrtk.org" target="_blank">rtk-users@openrtk.org</a><br><b>Subject: </b>[Rtk-users] Rtk Detector Displacemets<o:p></o:p></span></p></div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span lang=EN-US style='font-family:"Times New Roman",serif'> </span><span lang=EN-US><o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span lang=EN-US>Dear rtk-users,<o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span lang=EN-US> <o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span lang=EN-US>I have generated the geometry XML file by using the geometry calibration in my CBCT system. And I want to reconstruct the volume from 360 raw projections data.<o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span lang=EN-US>But after running the rtkfdk.cxx, I get an output message that "Cannot account for too large detector displacements, a part of space must be covered by all projections."<o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span lang=EN-US>And I try to use the addprojection function to generate a simple geometry structure using only SID and SDD, this problem did not happen but the reconstruction result is not correct.<o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span lang=EN-US>How can I solve this problem? Is there any limitation about the detector weighting?<o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span lang=EN-US> <o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span lang=EN-US>I really appreciate any help you can provide.<o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span lang=EN-US> <o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span lang=EN-US>With regards,<o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span lang=EN-US>Freyman li<o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span lang=EN-US> <o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span lang=EN-US> <o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span lang=EN-US> <o:p></o:p></span></p></div></div></div></div><p class=MsoNormal style='margin-bottom:12.0pt'><span lang=EN-US><br>_______________________________________________<br>Rtk-users mailing list<br><a href="mailto:Rtk-users@public.kitware.com">Rtk-users@public.kitware.com</a><br><a href="http://public.kitware.com/mailman/listinfo/rtk-users" target="_blank">http://public.kitware.com/mailman/listinfo/rtk-users</a><o:p></o:p></span></p></blockquote></div><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p></div></div></body></html>