[agumonkey]

It's a bit like a fluid pet scan, each angle will give partial information, you "integrate" to gather the surface.

Gives me ideas.

[samstave]

Think of the intro to the Ghost in the Shell, where the android body is floating up through a bath, and the manufacturer layer on the body is dissolving and being removed. This method could detect that the material is 100% removed from the body as well as confirm that the body is created exactly to spec.