Method for controlling the dose or the dose rate when recording x-ray images

A method of controlling a dose or a dose output while recording x-ray images using an x-ray detector comprising image elements configured to record a plurality of dose data values, the method comprising:

• selecting a dominant having a plurality of image elements from a previously recorded x-ray image;
• determining an actual dose or dose output value based on the plurality of dose data values related to the plurality of image elements;
• prescribing set point for the dose respectively dose output;
• and
• recording an x-ray image using a dose respectively dose output control algorithm, the control algorithm based on the actual dose or dose output value and the set point, wherein
• determining the actual dose or dose output value includes:
• determining a frequency distribution from the plurality of dose data values related to the plurality of image elements;
• determining a p-quantile based on the frequency distribution;
• determining a further dose data value from the p-quantile;
• and
• determining the actual dose or dose output value based on the further dose data value.