[Dcmlib] Re: [vtkusers] voxel's volume

[Mathieu Malaterre]

> To be *absolutely* sure the ZSpacing you calculate is the right you, you 
> need to be *absolutely* sure that the TWO images you're dealing with 
> have the same orientation, and are consecutive.
> To know the if the images are consecutive, you *need* to sort the whole 
> 'serie'.
> 
> The method
> bool gdcm::SerieHelper::ImagePositionPatientOrdering(FileList *fileSet);
> does the job, but I'm not sure vtkgdcmReader takes it into account (I'll 
> check and modify the method)
> 
> I'm almot sure ITK doesn't.
> 
> --> Mathieu ? do you agree?

Of course not ! I wrote the damn thing and it is doing the right 
computation. We always use this exact algorithm (normal+image origin) to 
compute the z spacing.
The Z Spacing dicom tag is only used in the case of a multi frame image.

SO ITK IS PERFECTLY SAFE !!

Mathieu