Radiographs, more commonly known as x-rays, are two dimensional images of the body which appear white, black, or varying shades of gray. Radiographs are utilized throughout all specialties of clinical medicine as they are widely accessibile and cost effective. The goal of this module is to serve as an introduction to radiography. It will provide basic priniciples of radiographs and supply you with information to aid in understanding what you are looking at when you view an image. What causes a structure to appear black, white, or gray on a plain radiograph? Click "next" to find out.