unsigned int x = pow(2, 29);
unsigned long size = x;

double* data = new double[size];
for (unsigned long i = 0; i < size; i++)
  data[i] = 0;

mitk::Image::Pointer image = mitk::Image::New();
mitk::PixelType TPixel = mitk::MakeScalarPixelType<double>();
unsigned int* dimensionsOfImage = new unsigned int[1];
dimensionsOfImage[0] = x;
image->Initialize(TPixel, 1, dimensionsOfImage, 1);
image->SetImportVolume(data, 0, 0, mitk::Image::CopyMemory);

mitk::IOUtil::Save(image, "C:/Users/groehl/Desktop/test.nrrd");