The present invention is related to an X-ray detector and to an X-ray detector system comprising the X-ray detector. It is further related to an X-ray system and to a method for obtaining an X-ray image.According to the invention, the X-ray detector is configured to be operable in a mixed read-out mode in which an output of the X-ray sensor comprises sequentially obtained first blocks, each first block comprising a plurality of sequentially obtained different second blocks, wherein each second block comprises a read-out of the target segment, and wherein more than one of the second blocks comprises a different part of the additional segments such that each first block comprises a read-out for each of the plurality of segments.