This is procedure in which a series of two dimensional axial computed tomographic scans collected on an individual or speciman are assembled into a three dimensional image. There are many software packages available. I use VoxBlast that runs on my desktop PC.
Here is the web address for the VoxBlast site that highlights my research: http://www.vaytek.com/Comments.html
These are a series of 3D reconstructions of a pigtailed macaque fetus just prior to birth. The left picture displays a surface reconstruction of the skull. The middle picture displays a 3D reconstruction in the midsagittal plane. Note the exquisite detail of the petrous temporal bone, cranial base, and palate. The right picture was made from the same series of CT scans. The skin is rendered tranparent blue. The brain mass is colored in a gradient of green.
These images are clips from a video-loop created from a 3D movie create from a series of 2D axial CT slices of a 60-day old pigtailed macaque. Ossified bone is colored cyan. The skin is rendered transparent and colored green while the soft-tissue visera is coded pink.
This image illustrates several types of craniosynostosis