Object radiography apparatus and method for determining a state of an object radiography apparatus

An object radiography apparatus, comprising:

• a radiation source configured to generate and emit an electromagnetic radiation for radiographing an object;
• a detector device configured to generate a radiograph of the object and arranged to permit the emitted electromagnetic radiation, which passes at least partly through the object, to imping at least proportionally on the detector device;
• a sensor arrangement provided in addition to the detector device configured to determine a radiation characteristic variable assigned to the radiation source, and
• an evaluation unit configured to:
• determine or receive a quality parameter of the radiograph of the object detected by the detector device, the quality parameter relating to at least one of an image quality of the radiograph and image signals generated by the detector device,
• evaluate the radiation characteristic variable, and
• make a statement about a state of the detector device based on the quality parameter relating to the radiograph generated by the detector device and based on the radiation characteristic variable determined by the sensor arrangement.