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There are several reasons why tomographic viewing of bone is of interest. First, bone is hard to view three-dimensionally using optical microscopes. Not only can you only view a slice of the bone, but bone does not cut well in all directions, so it is hard to get complete information. The feature that we’re really interested in is network of Haversian canals, which contain blood vessels, nerves, among other things. After obtaining a complete three-dimensional picture of these canals, we hope to be able to create a graph represenation (nodes and connections) and analyze how the network changes as animals age.