A personal display apparatus includes a dual-use plate, a detector, and electronic circuitry. The dual-use plate is configured to be worn by a user while the user is viewing a scene, to block, at least partially, X-ray radiation from passing through the plate and reaching an eye of the user, and to display information to be viewed by the user overlaid on the scene. The detector is coupled to the plate and is configured to measure a level of the X-ray radiation. The electronic circuitry is connected to the plate and to the detector, and is configured to exchange display signals with the plate so as to display the information, and to send a control signal indicative of the level of the X-ray radiation measured by the detector.
