| 摘要 |
The invention relates to an X-ray detector ( 1 ) with an array ( 2 ) of sensor elements ( 21 ), wherein each row (i) of sensor elements is connected via an addressing line to an addressing unit ( 5 ), and wherein each column j) of sensor elements is connected via a read-out line to a read-out unit ( 3 ). In the read-out unit ( 3 ), sensor signals are preprocessed, for example amplified by amplifiers ( 31 ). The detector further comprises a control unit ( 6 ) which is adapted to set the gains of said amplifiers ( 31 ) for each column (j) and each row (i) individually. The values of the gains may particularly be derived from a priori knowledge, from previous images of the object, or from the image signals of rows that have already been read out.
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