Patent ID: 8288732

Claim:
An image signal readout method for reading out an image signal from an image detector comprising a charge generation layer that generates charges by receiving a recording electromagnetic wave and a detection layer stacked on top of another, the detection layer including: multitudes of pixels, each having a collection electrode for collecting the charges generated in the charge generation layer, a capacitor for storing the charges collected by the charge collection electrode, and a TFT switch for reading out the charges stored in the capacitor; multitudes of scanning lines for switching ON/OFF the TFT switches; and multitudes of data lines through which the charges stored in the capacitors are read out, wherein a leak level flowing out to each of the data lines are detected with a signal for switching OFF the TFT switches being applied to each of the scanning lines prior to reading out the image signal, wherein a correction of the image signal is performed based on the leak level only when the leak level exceeds a predetermined threshold value, and wherein the correction of the image signal based on the leak level comprises the steps of: detecting an image signal by sequentially switching ON each group of the TFT switches connected to each of the scanning lines; detecting the leak level every time the image signal with respect to each of the scanning lines is detected; and generating a corrected image signal by performing an arithmetic operation between the image signal detected with respect to each of the scanning lines and the leak level.