The ``VV'' option stands for ``Voxel View,'' which is a commercial volume visualization program[11]. The VV option popup window is the same as for BOB as shown in Figure 45. The difference between BOB and VV is that instead of the single 3D volume file, VV is a directory of sequentially numbered 2D planar files. There are also 2 parameter files, ``_dimensions'' and ``_lut'', produced.