An adaptor for a turntable of a CT system includes at least two object turntables for at least two objects and a rotation transmission element configured to be coupled to the turntable of the CT system. The two object turntables are coupled to each other using a coupler such that the at least two object turntables rotate simultaneously. The rotation transmission element is coupled to the coupler and configured to transmit a rotation from the turntable of the CT system to the coupler in order to drive the at least two object turntables.