Patent ID: 7511747
Filing Date: 2009-03-31
Classification: H04N

Abstract:
1. A method of correcting digital noise generated by a flat-panel detector having a matrix-type detector panel and a plurality of readout amplifiers for reading out signals detected by the detector panel, the flat-panel configured to detect X-ray radiation and the detector panel comprising a dark area and an active area having a plurality of sub-areas, the method comprising: measuring a digital noise generated by at least one of the sub-areas when the detector panel is not exposed to radiation; calculating a correcting parameter for a respective sub-area based on the measured digital noise; correcting an output signal of the respective sub-area when the detector panel is exposed to radiation during an operation of the detector panel using the correcting parameter; measuring a digital noise generated by a first dark area and a second dark area spaced apart from one another; determining a first dark area correcting parameter (DF calculating a signal correcting parameter (S S