X-rays are special pictures of the inside of your body. A doctor will decide when you need an X-ray and what body part needs to be X-rayed. An X-ray machine, not a camera, is used to take these pictures. When the picture comes out, it won't like the ones in your photo album, but doctors have learned how to look at these pictures. Doctors can see broken bones, lung infections, and more. Superman may have X-ray vision, but your doctor has an X-ray machine!