Images of internal organs bones and tissues can be captured on film or in digital form using X-rays which emit invisible electromagnetic energy beams. Standard X-rays 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 X-rays use external radiation. A negative type image is created when X-rays 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).