<html><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><div>Hi,</div><div><br></div><div>I just had another though on this issue....</div><div><br></div><div>If the direction and origin are corrected to match ITK's coordinate system (LPS),</div><div>why does the data buffer is not ? Is it still consistent ?</div><div><br></div><div>Thanks,</div><div><br></div><div>Mathieu</div><br><div><div>On 6-Apr-09, at 1:33 PM, Luke Bloy wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite"><div>Hi Mathieu,<br><br>So nothing happens to the data buffer, meaning that its ordering isn't rearranged. the only thing that is changed is the way we relate the i,j,k coordinates to 'world coordinates'.<br><br>the 'origin' in both nifti and itk refers to the world coordinates of the first voxel in the data buffer (0,0,0).<br>so with a qform =<br>[1, 0, 0, -90]<br>[0, 1, 0, -126]<br>[0, 0, 1, -72]<br>[0, 0, 0, 1]<br><br>you get an origin of (-90 mm, -126 mm, -72 mm), since nifti qforms use RAS as the world frame this means that the (0,0,0) ijk voxel is located 90mm to the left, 126 posterior and 72 mm inferior, to whatever is at 0mm,0mm,0mm (in MRI this usually the scanner isocenter). So in itk's LPS world frame the origin should be set to (90,126,-72).<br><br>This is unrelated to the itkOrientImageFilter, which does do actually flipping and transposing of the data buffer.<br><br>-Luke<br><br><br>Mathieu Coursolle wrote:<br><blockquote type="cite">Hi,<br></blockquote><blockquote type="cite"><br></blockquote><blockquote type="cite">Thanks for your clarifications.<br></blockquote><blockquote type="cite"><br></blockquote><blockquote type="cite">However, I must admit that I am still a bit confused.<br></blockquote><blockquote type="cite"><br></blockquote><blockquote type="cite">Since NIfTI and ITK have different Left/Right and Anterior/Posterior directions,<br></blockquote><blockquote type="cite">I admit that the direction matrix needs to be modified.<br></blockquote><blockquote type="cite"><br></blockquote><blockquote type="cite">Since my image dimension is 181 x 217 x 181, a flip in X means that to change<br></blockquote><blockquote type="cite">the direction, the new origin is -90 + (181 - 1) = 90.<br></blockquote><blockquote type="cite"><br></blockquote><blockquote type="cite">A flip in Y however means that the new origin should be -126 + (217 - 1) = 90.<br></blockquote><blockquote type="cite"><br></blockquote><blockquote type="cite">Should I then expect instead a GetDirection() and GetOrigin() result of:<br></blockquote><blockquote type="cite">[-1, 0, 0, 90]<br></blockquote><blockquote type="cite">[0, -1, 0, 90]<br></blockquote><blockquote type="cite">[0, 0, 1, -72]<br></blockquote><blockquote type="cite">[0, 0, 0, 1] <br></blockquote><blockquote type="cite">Just inverting the sign of the origin would then mean that the world coordinates<br></blockquote><blockquote type="cite">are centered on (0, 0, 0)mm, which is not the always the case.<br></blockquote><blockquote type="cite"><br></blockquote><blockquote type="cite">Am I right ?<br></blockquote><blockquote type="cite"><br></blockquote><blockquote type="cite">Thanks!<br></blockquote><blockquote type="cite"><br></blockquote><blockquote type="cite">Mathieu<br></blockquote><blockquote type="cite"><br></blockquote><blockquote type="cite">On 6-Apr-09, at 12:13 PM, Luke Bloy wrote:<br></blockquote><blockquote type="cite"><br></blockquote><blockquote type="cite"><blockquote type="cite">Hi all,<br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite">So this is my understanding of how orientations and ITK work.<br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite">the GetDirection and GetOrigin methods in itk::Image return the directional cosines in an LPS world frame. Thus an identity matrix returned by GetDirection() would mean the image is stored in LPS.<br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite">The QForm and SForm matrices in the nifti file format are in the RAS world coordinate frame. See <a href="http://nifti.nimh.nih.gov/nifti-1/documentation/nifti1fields/nifti1fields_pages/qsform.html">http://nifti.nimh.nih.gov/nifti-1/documentation/nifti1fields/nifti1fields_pages/qsform.html</a><br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite">So Mathieu, what you are reporting is the expected behavior.<br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite">qform (shown by fslhd etc) of<br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite">[1, 0, 0, -90]<br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite">[0, 1, 0, -126]<br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite">[0, 0, 1, -72]<br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite">[0, 0, 0, 1]<br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite">should yield a GetDirection() and GetOrigin of<br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite">-1 0 0 90<br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite">0 -1 0 126<br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite">0 0 1 -72<br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite">0 0 0 1<br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite">Antoine,<br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite">Your situation is more confusing, I'm not familiar with dcm2nii, but it isn't unheard of to have dicom converters change the orientation of the output image, to bring it into some consistent frame (LAS is a favorite of labs that have lots of old code expecting analyze files). From what you posted it seems that dcm2nii converted your image from an LPS arranged dicom to an LAS arranged Nifti file. I would investigate the nifti file's qform and sform matrics using either nifti_tool, fslhd or pynifti to confirm this.<br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite">Hope this helps,<br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite">Luke<br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite">Mathieu Coursolle wrote:<br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><blockquote type="cite">Hi,<br></blockquote></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><blockquote type="cite"><br></blockquote></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><blockquote type="cite">I am having a similar issue, which may be related.<br></blockquote></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><blockquote type="cite"><br></blockquote></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><blockquote type="cite">I have a NIfTI file, which I load using itkNIfTIImageIO.<br></blockquote></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><blockquote type="cite"><br></blockquote></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><blockquote type="cite">By stepping into ITK, I can see that the s-form (sto_xyz) is:<br></blockquote></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><blockquote type="cite"><br></blockquote></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><blockquote type="cite">[1, 0, 0, -90]<br></blockquote></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><blockquote type="cite">[0, 1, 0, -126]<br></blockquote></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><blockquote type="cite">[0, 0, 1, -72]<br></blockquote></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><blockquote type="cite">[0, 0, 0, 1]<br></blockquote></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><blockquote type="cite"><br></blockquote></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><blockquote type="cite">However, when it read the origin and orientation of the resulting itkImage,<br></blockquote></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><blockquote type="cite">I get:<br></blockquote></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><blockquote type="cite"><br></blockquote></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><blockquote type="cite">[-1, 0, 0, 90]<br></blockquote></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><blockquote type="cite">[0, -1, 0, 126]<br></blockquote></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><blockquote type="cite">[0, 0, 1, -72]<br></blockquote></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><blockquote type="cite">[0, 0, 0, 1]<br></blockquote></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><blockquote type="cite"><br></blockquote></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><blockquote type="cite">This data is in the MNI-152 space. I know that the index (0, 0, 0) should be<br></blockquote></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><blockquote type="cite">(-90, -126, -72) mm in LPI coordinate system (NIfTI's default I believe).<br></blockquote></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><blockquote type="cite"><br></blockquote></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><blockquote type="cite">Since I want my data in the RAI coordinate system, I then use the itkOrientImageFilter.<br></blockquote></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><blockquote type="cite">Assuming it converts the image from LPI to RAI, I would expect the ouput to be:<br></blockquote></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><blockquote type="cite">[-1, 0, 0, 90]<br></blockquote></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><blockquote type="cite">[0, -1, 0, 90]<br></blockquote></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><blockquote type="cite">[0, 0, 1, -72]<br></blockquote></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><blockquote type="cite">[0, 0, 0, 1]<br></blockquote></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><blockquote type="cite"><br></blockquote></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><blockquote type="cite">But I get:<br></blockquote></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><blockquote type="cite">[1, 0, 0, -90]<br></blockquote></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><blockquote type="cite">[0, 1, 0, -90]<br></blockquote></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><blockquote type="cite">[0, 0, 1, -72]<br></blockquote></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><blockquote type="cite">[0, 0, 0, 1]<br></blockquote></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><blockquote type="cite"><br></blockquote></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><blockquote type="cite">By the way, my image dimensions are 181 x 217 x 181.<br></blockquote></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><blockquote type="cite"><br></blockquote></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><blockquote type="cite">I know that index (0, 0, 0) is (90, 90, -72) mm in RAI. <br></blockquote></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><blockquote type="cite">I am right that the matrix I get from ITK is not what is expected ?<br></blockquote></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><blockquote type="cite"><br></blockquote></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><blockquote type="cite">It looks to me that the itkNIfTIImageIO is doing some transform to<br></blockquote></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><blockquote type="cite">the orientation matrix.<br></blockquote></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><blockquote type="cite"><br></blockquote></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><blockquote type="cite">What would be that transformation's purpose ?<br></blockquote></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><blockquote type="cite"><br></blockquote></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><blockquote type="cite">Thanks a lot!<br></blockquote></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><blockquote type="cite"><br></blockquote></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><blockquote type="cite">Mathieu<br></blockquote></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><blockquote type="cite"><br></blockquote></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><blockquote type="cite">____________________ Mathieu Coursolle, M.Ing.<br></blockquote></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><blockquote type="cite">Rogue Research Inc. www.rogue-research.com <<a href="http://www.rogue-research.com/">http://www.rogue-research.com/</a>><br></blockquote></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><blockquote type="cite"><br></blockquote></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><blockquote type="cite"><br></blockquote></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><blockquote type="cite">On 6-Apr-09, at 10:46 AM, Antoine DUCHAMPS wrote:<br></blockquote></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><blockquote type="cite"><br></blockquote></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><blockquote type="cite"><blockquote type="cite">Hi all,<br></blockquote></blockquote></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><blockquote type="cite"><blockquote type="cite"><br></blockquote></blockquote></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><blockquote type="cite"><blockquote type="cite">I have a DWI sequence (brain) acquired with a Siemens scanner in Dicom<br></blockquote></blockquote></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><blockquote type="cite"><blockquote type="cite">format. After converting it to NIfTI with dcm2nii<br></blockquote></blockquote></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><blockquote type="cite"><blockquote type="cite">(<a href="http://www.sph.sc.edu/comd/rorden/mricron/dcm2nii.html">http://www.sph.sc.edu/comd/rorden/mricron/dcm2nii.html</a>) I tried to read<br></blockquote></blockquote></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><blockquote type="cite"><blockquote type="cite">it an recover the orientation by using ITK (I've copied the code below).<br></blockquote></blockquote></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><blockquote type="cite"><blockquote type="cite">The matrix I obtain is the following:<br></blockquote></blockquote></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><blockquote type="cite"><blockquote type="cite"><br></blockquote></blockquote></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><blockquote type="cite"><blockquote type="cite">0.9997 0.0000 0.0252<br></blockquote></blockquote></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><blockquote type="cite"><blockquote type="cite">0.0002 -1.0000 -0.0072<br></blockquote></blockquote></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><blockquote type="cite"><blockquote type="cite">-0.0252 -0.0072 0.9997<br></blockquote></blockquote></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><blockquote type="cite"><blockquote type="cite"><br></blockquote></blockquote></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><blockquote type="cite"><blockquote type="cite">However, the transforation matrix in the Dicom header is<br></blockquote></blockquote></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><blockquote type="cite"><blockquote type="cite"><br></blockquote></blockquote></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><blockquote type="cite"><blockquote type="cite">0.9997 0.0000 0.0252<br></blockquote></blockquote></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><blockquote type="cite"><blockquote type="cite">0.0002 1.0000 -0.0072<br></blockquote></blockquote></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><blockquote type="cite"><blockquote type="cite">-0.0252 0.0072 0.9997<br></blockquote></blockquote></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><blockquote type="cite"><blockquote type="cite"><br></blockquote></blockquote></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><blockquote type="cite"><blockquote type="cite">If the Dicom image orientation is LPS, this means that the image<br></blockquote></blockquote></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><blockquote type="cite"><blockquote type="cite">orientation in NIfTI is LAS (And not RAS as I believed). Could anybody<br></blockquote></blockquote></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><blockquote type="cite"><blockquote type="cite">clarify this please? Are there several possible orientations in NIfTI?<br></blockquote></blockquote></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><blockquote type="cite"><blockquote type="cite">If so, how can I know the specific image orientation?<br></blockquote></blockquote></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><blockquote type="cite"><blockquote type="cite"><br></blockquote></blockquote></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><blockquote type="cite"><blockquote type="cite">Antoine. <br></blockquote></blockquote></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><blockquote type="cite"><blockquote type="cite"><br></blockquote></blockquote></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><blockquote type="cite"><blockquote type="cite">#include "itkImageFileReader.h"<br></blockquote></blockquote></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><blockquote type="cite"><blockquote type="cite">#include "itkOrientedImage.h"<br></blockquote></blockquote></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><blockquote type="cite"><blockquote type="cite"><br></blockquote></blockquote></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><blockquote type="cite"><blockquote type="cite">const unsigned int Dimension = 4;<br></blockquote></blockquote></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><blockquote type="cite"><blockquote type="cite">typedef short PixelType;<br></blockquote></blockquote></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><blockquote type="cite"><blockquote type="cite">typedef itk::OrientedImage<PixelType, Dimension> ImageType;<br></blockquote></blockquote></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><blockquote type="cite"><blockquote type="cite">typedef ImageType::Pointer ImagePointerType;<br></blockquote></blockquote></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><blockquote type="cite"><blockquote type="cite">typedef itk::ImageFileReader< ImageType > ReaderType;<br></blockquote></blockquote></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><blockquote type="cite"><blockquote type="cite"><br></blockquote></blockquote></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><blockquote type="cite"><blockquote type="cite"><br></blockquote></blockquote></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><blockquote type="cite"><blockquote type="cite">int main(int argc, char* argv[])<br></blockquote></blockquote></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><blockquote type="cite"><blockquote type="cite">{<br></blockquote></blockquote></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><blockquote type="cite"><blockquote type="cite"><br></blockquote></blockquote></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><blockquote type="cite"><blockquote type="cite"> ImageType::Pointer image = ImageType::New();<br></blockquote></blockquote></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><blockquote type="cite"><blockquote type="cite"><br></blockquote></blockquote></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><blockquote type="cite"><blockquote type="cite"> ReaderType::Pointer reader = ReaderType::New();<br></blockquote></blockquote></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><blockquote type="cite"><blockquote type="cite"> reader->SetFileName(argv[1]);<br></blockquote></blockquote></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><blockquote type="cite"><blockquote type="cite"> reader->Update();<br></blockquote></blockquote></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><blockquote type="cite"><blockquote type="cite"><br></blockquote></blockquote></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><blockquote type="cite"><blockquote type="cite"> image = reader -> GetOutput();<br></blockquote></blockquote></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><blockquote type="cite"><blockquote type="cite"> std::cout << image->GetDirection() << std::endl; std::cout.flush();<br></blockquote></blockquote></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><blockquote type="cite"><blockquote type="cite"><br></blockquote></blockquote></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><blockquote type="cite"><blockquote type="cite">}<br></blockquote></blockquote></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><blockquote 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type="cite"><br></blockquote></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><blockquote type="cite">Visit other Kitware open-source projects at<br></blockquote></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><blockquote type="cite"><a href="http://www.kitware.com/opensource/opensource.html">http://www.kitware.com/opensource/opensource.html</a><br></blockquote></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><blockquote type="cite"><br></blockquote></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><blockquote type="cite">Please keep messages on-topic and check the ITK FAQ at: <a href="http://www.itk.org/Wiki/ITK_FAQ">http://www.itk.org/Wiki/ITK_FAQ</a><br></blockquote></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><blockquote type="cite"><br></blockquote></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><blockquote type="cite">Follow this link to subscribe/unsubscribe:<br></blockquote></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><blockquote type="cite"><a href="http://www.itk.org/mailman/listinfo/insight-users">http://www.itk.org/mailman/listinfo/insight-users</a><br></blockquote></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><blockquote type="cite"> <br></blockquote></blockquote></blockquote><blockquote type="cite"><br></blockquote><blockquote type="cite">____________________ Mathieu Coursolle, M.Ing.<br></blockquote><blockquote type="cite">Rogue Research Inc. www.rogue-research.com <<a href="http://www.rogue-research.com/">http://www.rogue-research.com/</a>><br></blockquote><blockquote type="cite"><br></blockquote><blockquote type="cite"><br></blockquote><blockquote type="cite"><br></blockquote><blockquote type="cite"><br></blockquote><blockquote type="cite"><br></blockquote><blockquote type="cite"><br></blockquote><blockquote 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