[vtkusers] VTK + ITK + DICOM + CT Slices wrong orientation.

[Mathieu Malaterre]

Hi John,

   As far as I know CT Image Storage should be handled correctly in
ITK, it is using the Image Orientation (Patient) to find out the
orientation of the image (and thus how to present it). Could you
either :
1. Use some public dataset and send me the link + screenshot of the
image flipped upside down
2. Send me a copy of the image that is appearing upside down for you.

  ITK has some limited supported for the new Enhanced CT Image Storage
class, but last time I checked it was working correctly.

Thanks
-Mathieu


On Sat, Jun 7, 2008 at 12:25 AM, John Drescher <drescherjm at gmail.com> wrote:
> I am developing an application to view and process Lung CT slices. I
> am using the LiverTumorSegmentation example to help with my
> development of my application that will use Qt instead of FLTK. When I
> load my DICOM cases in either LiverTumorSegmentation  or my app the
> Axial view needs to be flipped top to bottom and left to right and it
> appears the other 2 views need similar filps. I have done a some
> research on this however I am not sure the information I am reading is
> correct (older versions) or not so I want to ask here. Does the dicom
> series reader in itk read and process the orientation information that
> is stored in the DICOM headers? Will this always need to be flipped
> for vtk to view it correctly? I ask the second question because in the
> 3dslicer documentation they mention that "ITK internally does not do
> the same flipping of the data during read that VTK does. As result, if
> image data is passed from ITK to VTK for rendering, the pictures will
> appear upside down unless flipped."
>
> My software versions are itk-3.6.0, vtk-5.0.4 and Qt 4.3.4.
>
> --
> John M. Drescher
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-- 
Mathieu