### Description

!!! info
    The example uses [FullHead.mhd](https://raw.githubusercontent.com/lorensen/VTKExamples/master/src/Testing/Data/FullHead.mhd) which references [FullHead.raw.gz](https://github.com/lorensen/VTKExamples/blob/master/src/Testing/Data/FullHead.raw.gz?raw=true).

!!! note
    This original source code for this example is [here](https://gitlab.kitware.com/vtk/vtk/blob/395857190c8453508d283958383bc38c9c2999bf/Examples/VolumeRendering/Cxx/FixedPointVolumeRayCastMapperCT.cxx).
