Conventional radiography involves exposing a part of the body to a small dose of radiation to produce an image of the internal organs. When x-rays penetrate the body, they are absorbed in varying amounts by different parts of the anatomy. The ribs and spine, for example, absorb much of the radiation and appear white or light gray on the image. Lung tissue absorbs little radiation and appears dark on the image.
Examples of conventional radiography 
Bone X-ray
Chest X-ray 
Intravenous Pyelogram (IVP) 
Joint Arthrography
Lower GI (Barium Enema) 
Upper GI study 
