[Dcmlib] image's data is flipped by using vtkGDCMReader.

[Mathieu Malaterre]

Dennis,

	Ok I think I see what is going on. VTK define an image only in terms of 
spacing/origing and dimensions. There is no notion of Orientation. 
Whereas DICOM specifically defines it. ITK has a much better approach 
since it allows reading in the DICOM orientation and passing it right 
away to ITK.

	The only solution I can think of right now is to use the DICOM 
information later on in your pipeline. I'll assume you are familiar with 
VTK, therfore you should be able to do something like:


float orient[6];
gdcmFile *f ...
f->GetImageOrientationPatient( orient );

vtkImageActor *imageActor = ...
imageActor->SetInput( reader->GetOutput());
imageActor->SetOrientation ( orient );


HTH
Mathieu

Dennis wrote:
> Hi,
>  
> I have found the image's data is flipped along x-axis after i use 
> vtkGDCMReader to read a series of Dicom files.
> Can any one verify GDCM gets the correct orientation (such as RAI, or 
> LAS...)?
> When I do some 3D volume rendering, i found it. I do not like to flip it 
> back to get the correct result, that's dangenrous for huge data.
>  
> any hints will be helpful!
>  
>  
>  
> Dennis
>  
> 
> 
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