Patent ID: 6430258
Filing Date: 2002-08-06
Classification: H05G

Abstract:
A method for operating a radiation examination device which includes a radiation source and a detector device for the acquisition of radiation images, comprising the steps of:measuring at least one of the imaging dose and dose rate (RD) incident on a detector of the detector device, determining an image correction value (Zn) for each image of a measuring sequence of successive images acquired by the detector device in dependence on a selected image region (ROI) of the detector device, and determining an adaptive correction value (Yn+1) while using said image correction value (Zn) and image correction values of any preceding images in the measuring sequence, and determining a control value (XGCD, XGCR) for controlling the radiation source while using at least one of the measured dose and dose rate, said step of determining a control value (XGCD, XGCR) comprising the step of deriving the control value (XGCD, XGCR) from the at least one of the measured dose and dose rate (RD) while utilizing said adaptive correction value (Yn+1).