The main areas where fiber optic tapers and faceplates have found widespread use is in medical and dental imaging applications. In most medical radiography applications, a scintillating coating (e.g. cesium iodide, CSI) is deposited on the large end of the taper and converts an x-ray image to visible light. The light is then transferred and reduced through the taper and coupled to a digital chip for image processing.
Furthermore SCHOTT offers x-ray protection glass that is extremely effective even in thin versions to protect you from being exposed to radiation by accident.