A large area solid state x-ray detector employs a plurality of cells arranged in rows and columns composed of photodiodes that are charged, exposed to x-rays which deplete their charge in proportion to the exposure, and then recharged to determine the amount of exposure. Fast scanning of the photodiodes...http://www.google.es/patents/US5668375?utm_source=gb-gplus-sharePatente US5668375 - Fast scan reset for a large area x-ray detector
