typedef typename ImageType::ConstPointer ImageConstPointer;
typedef typename ImageType::Pointer ImagePointer;
typedef typename ImageType::RegionType RegionType;
typedef typename ImageType::PixelType PixelType;
typedef typename ImageType::SpacingType SpacingType;
typedef typename ImageType::SizeType SizeType;
typedef typename ImageType::ConstPointer ImageConstPointer;
typedef typename ImageType::Pointer ImagePointer;
typedef typename ImageType::RegionType RegionType;
typedef typename ImageType::PixelType PixelType;
typedef typename ImageType::SpacingType SpacingType;
typedef typename ImageType::SizeType SizeType;