Patent ID: 7615754

Claim:
An image sensor comprising: a two-dimensional array of pixel sensors; a layer of scintillation material adjacent to said two-dimensional array, said scintillation material emitting light in response to x-rays impinging thereon, said light being detected by said pixel sensors; and a controller that reads out data stored in said two-dimensional array of pixel sensors and forms an image comprising a two-dimensional array of pixels therefrom, said controller correcting that data for errors resulting from x-rays that generate electrons that are stored in said pixel sensors in the process of forming said image; wherein each of said pixel sensors comprises a photodetector that stores a charge in response to said light being received by that photodetector during a preceding time period; and wherein said controller forms said image by causing said array of pixel sensors to form a plurality of frames, each frame comprising an array of measurements determined by said charges stored by said pixel sensors during a corresponding preceding time period; and wherein said image comprises, for each pixel, a sum of said measurements corresponding to said charges stored by a corresponding one of said pixel sensors in at least two frames of said plurality of frames, said measurements having values less than a predetermined threshold value for each pixel sensor.