Thanks for all the new information - the more you write, the more I learn. I had never thought of "holes" in the part being scanned, because that part of the object couldn't be seen, an the need to take multiple scans, and combine them electronically. My first thought was "yikes!!".

I'm going to try to get the people involved in this at the hospital to read both thread, printer and scanner, and then ask them what I could do next to help them. Before I posted here, I thought I was trying to find a list of requirements so I could find appropriate hardware to buy. Now it's gotten much more complicated, but in a good way. The more we understand this, the more likely it will be that we'll buy the appropriate equipment, and get the necessary training. I want them to have all this worked out in advance, before buying anything.