[vtkusers] how to change image order

[John Drescher]

> sorry but I don't see how vtkImageFlip could help me to, for example:
> I have a vtkImageData obtained from vtkGDCMImageReader, the images are
> sorted by the dicom instance number tag, then, I need to change the
> sort order key to for example, acquisition time tag and then display
> the images with this new order.
>

Normally the with dicom CT images difference is just flipping the
image. However I can imagine cases where that will not work.

John