Radiograph is an image obtained through a technique using electromagnetic radiation. The image is obtained from radiation of light which are not visible. The light rays used are x-rays which is made to pass through an opaque object in order to analyse the interior parts of the object. This technique of producing the image of internal structure of a body is used to analyse the bone structure and its other internal functions of a human organ. The image so produced is captured on a plate or a film which is radiosensitive.