Patent ID: 8842805

Claim:
An x-ray examination device comprising: an X-ray source for emitting an X-ray beam of X-ray radiation while rotating around an imaging region, an X-ray detector having a plurality of detector cells for detecting X-ray radiation emitted by said X-ray source and having passed through said imaging region and for outputting detection signals, a source control unit for modulating an X-ray flux during detection intervals, starting at a beginning of a detection interval with an X-ray flux level that avoids saturation of the X-ray detector in a direct X-ray beam and thereafter increasing the X-ray flux, a detection control unit for evaluating said detection signals, the detection control unit comprising: i) a saturation detection unit for detecting, during the detection interval, saturation at predetermined detector cells and/or groups of detector cells, ii) a detection stopping unit for stopping detection of X-ray radiation at saturated detector cells or groups of detector cells for a remaining time of the detection interval, and iii) a time measuring unit for obtaining a time information indicating an effective time portion of the detection interval during which X-ray radiation has been detected without saturation, and a signal processing device for reconstructing an X-ray image based on the detection signals, wherein detection signals of detector cells and/or groups of detector cells at which detection of X-ray radiation has been stopped during the detection interval due to saturation are corrected using the time information.