<HTML dir=ltr><HEAD>
<META http-equiv=Content-Type content="text/html; charset=unicode">
<META content="MSHTML 6.00.6000.16608" name=GENERATOR></HEAD>
<BODY>
<DIV id=idOWAReplyText62417 dir=ltr>
<DIV dir=ltr><FONT face=Arial color=#000000 size=3><SPAN lang=EN-GB style="FONT-FAMILY: Tahoma; mso-ansi-language: EN-GB">
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-GB style="FONT-FAMILY: Tahoma; mso-ansi-language: EN-GB">I have serious problems dewarping a fluoroscopic image.<?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" /><o:p></o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-GB style="FONT-FAMILY: Tahoma; mso-ansi-language: EN-GB"><o:p> </o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-GB style="FONT-FAMILY: Tahoma; mso-ansi-language: EN-GB">Following the examples of deformable image registration I construct a set of source and target landmarks. This is done by manual identification of the source landmarks (image grid of my fluo-image) and the corresponding points in my calibration grid. Using MeVisLab I can visualize the landmarks with their corresponding displacement vectors. As I set the image spacing to 1, I do not care about pixels ore world coordinates.<o:p></o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-GB style="FONT-FAMILY: Tahoma; mso-ansi-language: EN-GB"><o:p> </o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-GB style="FONT-FAMILY: Tahoma; mso-ansi-language: EN-GB">Resampling of my fluo-image is done as it is shown in LandmarksWarping2 example. I read in the landmarks, my fluo-image and compute the dewarped fluo image. However what I get is not what I expected. The image is less distorted than the original fluo-image, but one can see that there is still marked distortion within the image. <o:p></o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-GB style="FONT-FAMILY: Tahoma; mso-ansi-language: EN-GB">A point which seems strange to me is the fact that the dewarped fluo image seems to be bigger than the original image. However all deformation is directed to the centre of the image, which should result in a shrunken image rather than an enlarged image.<o:p></o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-GB style="FONT-FAMILY: Tahoma; mso-ansi-language: EN-GB"><o:p> </o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-GB style="FONT-FAMILY: Tahoma; mso-ansi-language: EN-GB"><o:p> </o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-GB style="FONT-FAMILY: Tahoma; mso-ansi-language: EN-GB"><o:p> </o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-GB style="FONT-FAMILY: Tahoma; mso-ansi-language: EN-GB">I tried different kernels, I tried whether it would make any difference using itkWarpImageFilter or itkResampleImageFilter, I double checked the landmarks, but in the end I get the same result. <o:p></o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-GB style="FONT-FAMILY: Tahoma; mso-ansi-language: EN-GB"><o:p> </o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-GB style="FONT-FAMILY: Tahoma; mso-ansi-language: EN-GB">I tried to look onto the deformation field – however the *.mda image which is generated using the code of the deformable registration examples does not make sense when I try to put some glyphs on it using ParaView. I suppose that only the x-values of the vectors provided within the mda-file are used.<o:p></o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-GB style="FONT-FAMILY: Tahoma; mso-ansi-language: EN-GB"><o:p> </o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-GB style="FONT-FAMILY: Tahoma; mso-ansi-language: EN-GB"><o:p> </o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-GB style="FONT-FAMILY: Tahoma; mso-ansi-language: EN-GB">Here are links to the different images I referred to within the mail.<o:p></o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-GB style="FONT-FAMILY: Tahoma; mso-ansi-language: EN-GB"><o:p> </o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-GB style="FONT-FAMILY: Tahoma; mso-ansi-language: EN-GB">Fluo image:<A href="http://www.bilder-upload.eu/show.php?file=lOAULD07LeTb0fZ.jpg">http://www.bilder-upload.eu/show.php?file=lOAULD07LeTb0fZ.jpg</A><o:p></o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-GB style="FONT-FAMILY: Tahoma; mso-ansi-language: EN-GB">Grid: <A href="http://www.bilder-upload.eu/show.php?file=ON5DUNAnbRZaQ9w.jpg">http://www.bilder-upload.eu/show.php?file=ON5DUNAnbRZaQ9w.jpg</A><o:p></o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-GB style="FONT-FAMILY: Tahoma; mso-ansi-language: EN-GB">Dewarped fluo image: <A href="http://www.bilder-upload.eu/show.php?file=F5KaxAcLLwbY1og.JPG">http://www.bilder-upload.eu/show.php?file=F5KaxAcLLwbY1og.JPG</A><o:p></o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-GB style="FONT-FAMILY: Tahoma; mso-ansi-language: EN-GB">Source landmarks <A href="http://www.bilder-upload.eu/show.php?file=wcG9VZa0BapBS1k.jpg">http://www.bilder-upload.eu/show.php?file=wcG9VZa0BapBS1k.jpg</A><o:p></o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-GB style="FONT-FAMILY: Tahoma; mso-ansi-language: EN-GB">Deformation field within MeVisLab <A href="http://www.bilder-upload.eu/show.php?file=iBrGaequ69018Re.jpg">http://www.bilder-upload.eu/show.php?file=iBrGaequ69018Re.jpg</A><o:p></o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-GB style="FONT-FAMILY: Tahoma; mso-ansi-language: EN-GB">Deformation field within Paraview <A href="http://www.bilder-upload.eu/show.php?file=9lKFQdamFMjR0In.jpg">http://www.bilder-upload.eu/show.php?file=9lKFQdamFMjR0In.jpg</A><o:p></o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-GB style="FONT-FAMILY: Tahoma; mso-ansi-language: EN-GB"><o:p> </o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-GB style="FONT-FAMILY: Tahoma; mso-ansi-language: EN-GB"><o:p> </o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-GB style="FONT-FAMILY: Tahoma; mso-ansi-language: EN-GB"><o:p> </o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-GB style="FONT-FAMILY: Tahoma; mso-ansi-language: EN-GB">Regards, Peter.<o:p></o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"></SPAN></FONT><FONT face=Arial color=#000000 size=3></FONT></P></DIV></DIV>
<DIV id=idSignature86109 dir=ltr>
<DIV><FONT face=Arial color=#000000 size=2>------------------------------------</FONT></DIV>
<DIV><FONT face=Arial color=#000000 size=2>Peter Böttcher, Dr med vet, DipECVS</FONT></DIV>
<DIV><FONT face=Arial color=#000000 size=2><FONT face=Arial size=2><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">European Veterinary Specialist in Surgery</SPAN></FONT></FONT></DIV>
<DIV><FONT face=Arial color=#000000 size=2><FONT face=Arial size=2><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">Fachtierarzt für Kleintierchirurgie</SPAN></FONT></FONT></DIV>
<DIV><FONT face=Arial color=#000000 size=2><FONT face=Arial size=2><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: Arial"></SPAN></FONT></FONT><FONT face=Arial><FONT size=2>Klinik für Kleintiere</FONT> <BR><FONT size=2>Universität Leipzig</FONT> <BR><FONT size=2>An den Tierkliniken 23</FONT> <BR><FONT size=2>D-04103 Leipzig (Germany)</FONT></FONT></DIV>
<DIV><FONT face=Arial><FONT size=2>Tel: +49-341-9738700</FONT> <BR><FONT size=2>Fax: +49-341-9738799</FONT></FONT></DIV>
<DIV><FONT face=Arial><FONT size=2>email: <A href="mailto:boettcher@kleintierklinik.uni-leipzig.de">boettcher@kleintierklinik.uni-leipzig.de</A></FONT><BR></FONT></DIV></DIV></BODY></HTML>