An X-ray screen box is a backlit device used to display radiographic images. It consists of a uniformly illuminated surface, typically made of a translucent material, which provides the necessary contrast and brightness for clear visualization of X-ray films. The light source, usually fluorescent or LED, is designed to evenly distribute light across the entire viewing area to enhance the visibility of fine details in the radiographs. X-ray screen boxes are essential tools in radiology departments for accurately interpreting and diagnosing medical conditions from X-ray films.