Radiography is the imaging of body structures, or parts of the body, using X-rays. X-rays are a form of radiation (X-radiation) similar to visible light, radio waves and microwaves. X-radiation is special because it has a very high energy level that allows the X-ray beam to penetrate through the body and create an image or picture. Plain X-rays are the simplest medical images created through X-radiation. Other tests that also use X-rays are more complicated and require the use of computers to generate a picture.