The invention relates to a medical system with a medical device, especially an x-ray, a C-arm x-ray, a computer tomograph, a magnetic resonance tomograph or an ultrasound tomograph. The medical device features a control input for receiving a control signal and can be controlled as a function of the control signal. The medical system also features a user interface with a control facility to allow control by a user. The control facility is, depending on a movement of the control element, for generating the control signal. The user interface features a selection facility and at least two facility interfaces being effectively connected to the selection facility. The facility interfaces are each for connection to a control input of the at least two medical devices. The selection facility is for connecting the control facility to at least one or precisely one facility interface.