Patent Number: 
Section: claims

1. A collimator exchange system comprising: a first frame having a plurality of co-planar receptacles, a collimator mateable to at least one of said plurality of co-planar receptacles; and  a second frame having a first docking member, said first docking member positionable adjacent to said at least one of said plurality of co-planar receptacles such that said first docking member can contact said collimator to unmate said collimator from said at least one of said plurality of co-planar receptacles. 2. A system as in  claim 1  wherein said first docking member comprises a protrusion and said collimator comprises an indentation, said protrusion mateable with said indentation to align said collimator with said first docking member when said collimator is unmated from said first receptacle. claim 1 3. A system as in  claim 1  wherein said collimator is mated to said first docking member concurrently with said unmating of said collimator from said at least one of said plurality of co-planar receptacles. claim 1 4. A system as in  claim 1  wherein said at least one of said plurality of co-planar receptacles and said first docking member are independently movable. claim 1 5. A system as in  claim 1  wherein said at least one of said plurality of co-planar receptacles comprises a securing member to hold in place said collimator when said collimator is mated to said at least one of said plurality of co-planar receptacles. claim 1 6. A system as in  claim 1  wherein said first frame comprises a positioning arm, said at least one of said plurality of co-planar receptacles coupled to said positioning arm. claim 1 7. A system as in  claim 6  wherein said positioning arm is capable of rotational movement. claim 6 8. A system as in  claim 1  wherein said second frame comprises a positioning arm, said first docking member coupled to said positioning arm. claim 1 9. A system as in  claim 8  wherein said positioning arm is capable of translational movement. claim 8 10. A system as in  claim 1  wherein said first docking member houses a radiation detector. claim 1 11. An apparatus for transferring collimators, said apparatus comprising: a housing;  a first transfer member movably coupled to said housing;  a second transfer member movably coupled to said housing; and  a rotatable delivery arm having a first side and a second side, a first collimator of a first plurality of collimators being coupled in a co-planar arrangement to said first side, a second collimator of a second plurality of collimators being coupled in a co-planar arrangement to said second side. 12. An apparatus as in  claim 11  wherein said delivery arm rotates from a first position to a second position when at least one of said first and second collimators is to be transferred, and wherein when said delivery arm is in said second position, one of said first and second transfer members is disposed adjacent to said at least one of said first and second collimators. claim 11 13. An apparatus as in  claim 12  wherein if both of said first and second collimators are to be transferred, said first and second transfer members concurrently uncouple from said delivery arm said first and second collimators, respectively, while said delivery arm is in said second position. claim 12 14. An apparatus as in  claim 13  wherein said delivery arm rotates from said second position to said first position when said first and second collimators have been uncoupled from said delivery arm. claim 13 15. An apparatus as in  claim 12  wherein if only one of said first and second collimators is to be transferred, one of said first and second transfer members uncouples from said delivery arm said one of said first and second collimators while said delivery arm is in second position. claim 12 16. An apparatus as in  claim 15  wherein said delivery arm rotates from said second position to said first position when said one of said first and second collimators has been uncoupled from said delivery arm. claim 15 17. An apparatus as in  claim 11  wherein said first transfer member, said second transfer member, and said delivery arm are independently movable. claim 11 18. An apparatus as in  claim 11  wherein said delivery arm is capable of translational and rotational movement. claim 11 19. A method for transferring collimators, said method comprising: moving a gate containing a plurality of collimator carriers from a first position to a second position;  positioning a docking arm adjacent to a predetermined one of said plurality of collimator carriers;  unloading a collimator from said predetermined one of said plurality of collimator carriers to said docking arm; and  removing said gate from said second position to said first position. 20. A method as in  claim 19  further comprising securing said collimator to said docking arm. claim 19 21. A method as in  claim 20  further comprising repositioning said docking arm away from said predetermined one of said plurality of collimator carriers, said repositioning performed after said securing and before said removing. claim 20 22. A method as in  claim 19  wherein said predetermined one of said plurality of collimator carriers moves through a rotational path. claim 19 23. A method for transferring collimators, said method comprising: moving a collimator carrier from a first position to a second position;  positioning a docking arm adjacent to said collimator carrier;  unloading a collimator from said collimator carrier to said docking arm; and removing said collimator carrier from said second position to said first position; wherein said collimator carrier moves concurrently through a translational path and a rotational path. 24. An apparatus for exchanging a collimator in a nuclear medicine imaging system, said apparatus comprising: delivery means for moving a plurality of collimator carriers from a first position to a second position, the plurality of collimator carriers being co-planar;  positioning means for moving a docking arm adjacent to a predetermined one of said collimator carriers; and  transferring means for unloading a collimator from said predetermined one of said collimator carriers to said docking arm. 25. An apparatus as in  claim 24  further comprising securing means for securing said collimator to said docking arm. claim 24 26. An apparatus as in  claim 24  further comprising actuating means for rotating said delivery means between said first position and said second position. claim 24 27. A collimator exchange system comprising: a first frame having a plurality of co-planar receptacles, a collimator mateable to at least one of said plurality of co-planar receptacles;  a second frame having a first docking member, said first docking member positionable adjacent to said at least one of said plurality of co-planar receptacles such that said first docking member can contact said collimator to unmate said collimator from said at least one of said plurality of co-planar receptacles; and  a plurality of sensors disposed within the receptacles and collimators. 28. The systems of  claim 27 , wherein the sensors comprise Hall effect sensors. claim 27