What is radiography?
Radiography is an imaging technique that uses x-rays to create projectional (2D) images of a region of interest in the body. It is performed by shining x-rays on a film or other image detector with a patient placed in front of it in a certain orientation. Different types of tissues in the patient attenuate x-rays to different degrees, leading to formation of a composite of x-ray shadows that will ultimately create the radiographic image. It is most commonly used to evaluate the bones and joints, the chest (especially the lungs), the abdomen and pelvis (especially the bowel), and the breasts (in which case it is called mammography).
