An adapter apparatus includes a generally cylindrical adapter body 14 including a channel 16 extending axially therethrough, the adapter body having an interior surface, bounding the channel, and an exterior surface 18, a generally circular external cross section and an interior cross section which is adapted to engage at least one object 10, the external surface being formed from a material which is capable of supporting a scanning or testing apparatus at a constant distance from the origin of the circle forming the external cross section.