[vgoh1]

Sounds like you would want to edit in Blender, or some type of 3d modeling software, and, with an anatomy textbook in hand, edit out the parts that are obviously not bone.

[mediocrejoker]

That sounds labor-intensive and error-prone, but it's probably still the best way to end up with an accurate result.

[hprotagonist]

It's the only way to do it. (source, i do 3d tissue reconstructions sometimes)