[Insight-users] DICOM orientation

[Bill Lorensen]

3D Slicer should do the correct thing.

On Mon, Oct 5, 2009 at 8:04 PM, Harvey Cline <harvey.cline at kitware.com> wrote:
> 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
>>
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