A plain x-ray is an imaging test that takes a picture of the inside of your body. It uses a low dose of x-ray radiation. X-rays show body parts according to how dense (solid) they are.
Doctors usually use plain x-rays to find problems in solid body parts like your bones
Plain x-rays aren't as good as other imaging tests for showing soft body parts like muscles, ligaments, and internal organs
Doctors can combine x-rays to create motion pictures that show a body part moving, such as your heart beating
The main risk in getting an x-ray is being exposed to radiation. Doctors try to limit the total amount of radiation you get over your lifetime. Getting too much radiation can raise your chance of getting cancer.