    volume_mapper = vtkFixedPointVolumeRayCastMapper()
    volume_mapper.SetInputConnection(reader.GetOutputPort())

    # The color transfer function maps voxel intensities to colors.
    # It is modality-specific, and often anatomy-specific as well.
    # The goal is to one color for flesh (between 500 and 1000)
--
    volumeMapper = vtkFixedPointVolumeRayCastMapper()
    volumeMapper.SetInputConnection(dataImporter.GetOutputPort())

    # The class vtkVolume is used to pair the previously declared volume as well as the properties
    #  to be used when rendering that volume.
    volume = vtkVolume()
--
    volumeMapper = vtkFixedPointVolumeRayCastMapper()
    volumeMapper.SetInputConnection(reader.GetOutputPort())

    # The volume holds the mapper and the property and
    # can be used to position/orient the volume.
    volume = vtkVolume()
