Hi,
The ITK reader is part of VV, our viewer in Lyon. It is open-source, see http://vv.creatis.insa-lyon.fr/. The source files are in the folder common: clitkXdrImageIOFactory.cxx clitkXdrImageIOFactory.h clitkXdrImageIOReader.cxx clitkXdrImageIOWriter.cxx.
You can also directly use the compiled version of vv (open an image and save it in a format of your choice, detected with the filename extension, e.g. xdr for uncompressed xdr) or compile our command line tools (cmake option), one of them being clitkImageConvert (usage example: clitkImageConvert -i file.xdr -o file.mhd).
Simon
