vtkImageData* cur = mReader.GetImage( (*it));
// void* src = cur->GetScalarPointer(0,0,0);
// void* dst = out->GetScalarPointer(0,0,slice);
vtkImageData* cur = mReader.GetImage( (*it));
// void* src = cur->GetScalarPointer(0,0,0);
// void* dst = out->GetScalarPointer(0,0,slice);