Those slices look hard to align after being deformed by cutting, transport and the preparation for photography. Why not take pictures of the remaining brain instead - like they did for the Visible Human project?
Maybe further project should do both to allow for making more advanced models? And when one first are taking the photo, maybe one was to do other studies as well? X-ray, ultraviolet, infrared, fluorescence, phase contrast etc. Who knows what one would revile if that data was freely available on the internet.
If you guys are interested in seeing open source brain images, check out http://www.brain-map.org, it's a great resource working on something similar.