1. An x-ray system, comprising: an x-ray source that emits x-ray radiation; a radiation detector located in a path of said x-ray radiation that detects at least x-ray radiation attenuated by an examination subject irradiated by said x-ray radiation, and that generates two-dimensional radiation detector data corresponding to said x-ray radiation attenuated by the examination subject; a monitor detector irradiated by said x-ray radiation emitted by said x-ray source that does not travel through said examination subject, said monitor detector being configured as an energy-resolving detector to generate energy-resolved current dose measurement data representing a current dose of said x-ray radiation; and said monitor detector comprising at least two detector elements located in succession in a direction of propagation of said x-ray radiation, each of said at least two detector elements being a detector element selected from the group consisting of an energy-integrating detector element and a photon-counting detector element.