COMPACT CMOS-BASED X-RAY DETECTOR ADAPTED FOR DENTAL APPLICATIONS

摘要

An image sensor having a two-dimensional array of pixel sensors [201], a layer of scintillation material[206], and a controller[202] is disclosed. The layer of scintillation material is adjacent to the two-dimensional array, the scintillation material emits light in response to x-rays impinging thereon. The pixel sensors detect this light. The controller reads out data stored in the two-dimensional array of pixel sensors and forms an image therefrom. The controller corrects the data for errors resulting from x-rays that generate electrons that are stored in the pixel sensors [41] in the process of forming the image. In one aspect of the invention, the controller forms the image by causing the two-dimensional array to form a plurality of frames, each frame includes a measurement of a charge stored on each photodiode[46] during a preceding time period. The controller selectively combines data from the frames to form the image.