typedef itk::ImageToVTKImageFilter <TItkImageType> ConverterType;
typename ConverterType::Pointer converter = ConverterType::New();
converter->SetInput(input);
typedef itk::ImageToVTKImageFilter <TItkImageType> ConverterType;
typename ConverterType::Pointer converter = ConverterType::New();
converter->SetInput(input);