The invention relates to a computer tomograph comprising a detector unit (2) consisting of a plurality of detectors (1) for identifying X-ray radiation (40). According to the invention, the individual detectors (1) of the detector unit (2) are configured to receive incident quanta of the X-ray radiation (40) and to record the received X-ray radiation (40), both in terms of its intensity and in terms of the quantum energy of the individual X-ray quanta of the received X-ray radiation (40). The invention also relates to a corresponding method for identifying X-ray radiation by means of a computer tomograph that comprises a detector unit (2) consisting of a plurality of detectors (1).