Images of internal organs, bones, and tissues can be captured on film or in digital form using s, which emit invisible electromagnetic energy beams. Standard s are used for a variety of purposes, such as the diagnosis of malignancies and bone injuries. To create pictures of the body, its organs, and other internal structures for diagnostic reasons, s use external radiation. A negative type image is created when s penetrate human structures and land on specially prepared plates (similar to camera film) or digital media (the more solid a structure is, the whiter it appears on the film).