[vtkusers] Ref:vtkDICOMImageReader.

[Kent Williams]

The Insight library (http://www.itk.org) has a more comprehensive DICOM 
reader.  Of course you may not want to have to build ITK for your app, 
so you could also use the GDCM library, upon which the ITK Dicom reader 
is based.

http://www.creatis.insa-lyon.fr/Public/Gdcm/Main.html

You'd still have to copy out (and possibly rearrange) pixel data to use 
it with VTK, though given how GDCM handles buffer allocation, you could 
allocate your vtkImageData object, get the buffer pointer and pass it 
into GDCM before reading the file, and save a redundant copy.