We ran across an interesting video that talks about Materialise's ventures into the medical manufacturing space. We've posted about medical uses of 3D print tech before, but Materialise specializes in this niche, and have for quite some time.
Materialise produces 3D software specifically designed for this market: Mimics, which can transform medical 2D CT or MRI data into usable 3D models. From those models prosthetics or other medical implants can be derived. In the video you'll see students using the software to design a prosthetic leg for Cassidy the dog.
How popular is this approach? According to the video, "Nearly all orthopedic implant manufacturers are using Mimics to design custom hips and knees".