A radiation shield includes a radio-opaque drape which has an open area extending completely through the drape to provide a viewing site. Radiation control structure in the form of a vent system is located in the open area. The vent system includes a plurality of radio-opaque slats extending at least partially across at least a portion of the open area. The slats preferably extend outwardly away from the surface of the drape to facilitate the capturing of scattered radiation.