[Insight-users] DICOM orientation

[Harvey Cline]

Hi John

There is a difference in the image origin definition in VTK and ITK,
the first is in the upper left hand corner and the second is in the
lower left hand corner. Connecting the pipelines can give an image
flip while everything is consistant in either the ITK or VTK
environments. This is surprizing since these methods of using both VTK
and ITK environments in a single application are relatively new. Thank
you for this observation

Regaurds
Harvey

On Mon, Oct 5, 2009 at 6:13 PM, John Drozd <john.drozd at gmail.com> wrote:
> Hello,
>
> I am reading a brain subject in the form of a DICOM series using ITK and
> writing it out from memory as a volume.
> I used the method shown in Examples/IO/DicomSeriesReadImageWrite2.cxx
> I viewed the original DICOM series in 3D Slicer, and also viewed the
> outputted volume in 3D Slicer.
> I am using 3D Slicer because I am developing a segmentation module for 3D
> Slicer using ITK.
> I noticed that the original DICOM series and the outputted volume are
> inverted in orientation, such that the original series is the radiologist
> view and the outputted volume is the neurosurgean view as per
> http://www.itk.org/pipermail/insight-users/2009-June/031128.html and
> http://www.itk.org/Wiki/Proposals:Orientation#DICOM_LPS_Differences_in_Visualization_presented_to_Radiologist_and_NeuroSurgeons
>
> Does this have something to do with what I read on the internet that vtk's
> images are flipped vertically from itk's images?
> Is there a way to manipulate the image in memory using ITK so that Slicer
> will display the outputted volume in the same radiologist orientation as the
> original DICOM series?
>
> Thank you.
>
> john
>
> --
> John Drozd
> Postdoctoral Fellow
> Imaging Research Laboratories
> Robarts Research Institute
> Room 1256
> 100 Perth Drive
> London, Ontario, Canada
> N6A 5K8
> (519) 661-2111 ext. 25306
>
> _____________________________________
> Powered by www.kitware.com
>
> Visit other Kitware open-source projects at
> http://www.kitware.com/opensource/opensource.html
>
> Please keep messages on-topic and check the ITK FAQ at:
> http://www.itk.org/Wiki/ITK_FAQ
>
> Follow this link to subscribe/unsubscribe:
> http://www.itk.org/mailman/listinfo/insight-users
>
>