I just had to recompile ITK because something in ImageStatistics relies on review code from ITK. Is that ok? I guess yes, but perhaps there are arguments against it?
Is it possible to #ifdef the code? How important is the function? ITK Review ON should not be the default for MITK in general I think. It's not always well tested, the API is not yet stable.
Is it a single class, maybe just a header. Then we could import it in the MITK source tree until it is merged to ITK.