Patent ID: 7629574

Claim:
Method of detecting the sensitivity of radiation detectors participating in a detector inventory test, the method comprising the steps of subjecting each of the detectors to a substantially identical flat field radiation exposure to generate a radiation image in the detector, measuring by means of a dose meter for each of the radiation images the corresponding radiation dose to which the detector was exposed, generating for each of the detectors a number of signals (ROI signals) representing the radiation image at a predefined number of regions of interest (ROI's), the ROI signals being corrected for the non-uniform characteristics of the flat field exposure over a detector surface, calculating for each detector, a detector signal by means of the corrected ROI signals, correcting the detector signals for shot-to-shot radiation output variability of the exposure equipment reflected by differences of the measured radiation dose, calculating for the inventory an inventory average signal by averaging the corrected detector signals, and determining a relative detector sensitivity as the deviation of the corrected detector signal from the inventory average signal.