Patent ID: 7274767

Claim:
A radiation scanning system for scanning an object, comprising: a crane system to move the object from a first location to a second location; a radiation source proximate to the crane system; a radiation detector proximate to the crane system, the radiation detector positioned to receive radiation interacting with an object; wherein the source and detector are positioned such that an object may be moved between the source and the detector by the crane system; and a carriage coupled to the crane system to engage the object and to move the object from the first location to the second location; the carriage comprising: a first member coupled to the crane system; a second member rotatably coupled to the first member to be rotated in a first direction and capable of being coupled to the object; and a rotatable member coupled to the carriage for rotation in a second direction opposite to the first direction, to counterbalance, at least in part, angular momentum generated during rotation of the second member.