Abstract: A quality control mechanism for a nuclear camera system having a field of view includes at least one source assembly for a radioactive material. The source assembly is configured to automatically remotely move the radioactive material into the field of view and automatically remotely move the radioactive material out of the field of view. The nuclear camera system may have a patient handling system. The quality control mechanism is integrated with the patient handling system at the front end. The radioactive material may be configured as a line source or a point source. A multiple head registration shield tube assembly may extend over the line source to substantially limit the radioactivity emitted by a number of slots in the shield tube assembly.