<div dir="ltr"><div><div><div><div><div><div><div><div><div>Dear Tobias,<br></div>The forward projection has 2 inputs:<br></div>- input 0: the stack of projections in which you wish to forward project,<br></div>- input 1: the volume you wish to forward project.<br></div>For the <span tabindex="-1" id=":t4.1" style="" class="">backprojection</span>, it's exactly the same:<br></div>- input 0: the volume in which you wish to <span tabindex="-1" id=":t4.2" style="" class="">backproject</span>,<br></div>- input 1: the stack of projections you wish to <span tabindex="-1" id=":t4.3" style="" class="">backproject</span>.<br></div>Be aware that <span lang="EN-US"><span tabindex="-1" id=":t4.4" style="" class="">JosephBackProjectionImageFilter</span> is the transpose of the forward projection and will have some aliasing (see, e.g., <a href="http://iopscience.iop.org/article/10.1088/0031-9155/49/11/024/meta;jsessionid=87B598ABFDC2AA07D1DED2DEE607F0E7.c2.iopscience.cld.iop.org">De Man and <span tabindex="-1" id=":t4.5" style="" class="">Basu</span></a> to see what I mean).<br></span></div><span lang="EN-US">I have personally never used <span tabindex="-1" id=":t4.6" style="" class="">MITK</span> but don't hesitate to share your experience on the mailing list.<br></span></div><span lang="EN-US">Simon<br></span></div><div class="gmail_extra"><br><div class="gmail_quote">On Wed, May 4, 2016 at 12:59 AM, Tobias Stein <span dir="ltr"><<a href="mailto:tstein@stud.hs-heilbronn.de" target="_blank">tstein@stud.hs-heilbronn.de</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div link="#0563C1" vlink="#954F72" lang="DE"><div><p class="MsoNormal"><span lang="EN-US">Hi all,<u></u><u></u></span></p><p class="MsoNormal"><span lang="EN-US"><u></u> <u></u></span></p><p class="MsoNormal"><span lang="EN-US">i want to use the forward and backward projection to reduce metal artefacts in ct images. I’ve seen so far that I may use the JosephForwardProjectionImageFilter to perform the forward projection. I’ve also seen the test for this class but I don’t get it, where should i put my 2D slice as input to execute the transformation. About the back transformation with the JosephBackProjectionImageFilter I also need more information how I can use it to transform a sinogram back to a ct slice. There is a test at the documentation, but the link is missing there.<u></u><u></u></span></p><p class="MsoNormal"><span lang="EN-US"><u></u> <u></u></span></p><p class="MsoNormal"><span lang="EN-US">I’ve got another independent question.<u></u><u></u></span></p><p class="MsoNormal"><span lang="EN-US">Are some of you familiar with MITK and know how to get the superbuild up and running with RTK? I am writing a MITK-Plugin and want to reduce the metal artifacts before a segmentation. So if some of you have experience with the combination of RTK and MITK it would be nice if you will share it ;)<u></u><u></u></span></p><p class="MsoNormal"><span lang="EN-US"><u></u> <u></u></span></p><p class="MsoNormal"><span lang="EN-US">Best regards,<u></u><u></u></span></p><p class="MsoNormal"><span lang="EN-US">Tobias<u></u><u></u></span></p><p class="MsoNormal"><u></u> <u></u></p></div></div><br>_______________________________________________<br>
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