docs: def _import_data(data, axis, slice_step, first_slice_offset=0):
      """
      import ndarray or SimpleITK data
      """
      try:
          import SimpleITK as sitk
          if type(data) is sitk.SimpleITK.Image:
              data = sitk.GetArrayFromImage(data)
      except:
          pass
  
      data = __select_slices(data, axis, slice_step, first_slice_offset=first_slice_offset)
      return data