The invention relates to a medical device for diagnostics and/or therapy with a system, with a device for self-analysis of the systems and creation of system internal status messages, with a device for interpretation of the system-internal status messages, with associated storage means for special technical and application knowledge, with an operating console for output of interpreted status messages and input of instructions, where the device for interpretation is embodied such that the system-internal status messages are converted on the basis of specialist technical and application knowledge into the interpreted status messages.