An x-ray is a type of radiation used to create a picture of the inside of the body.
WHY IS IT DONE?
They're mainly used to look at the bones and joints, although they're sometimes used to detect problems affecting soft tissue, such as internal organs.
PRECAUTIONS
Avoid the primary X-ray beam.
Wear protective equipment (e.g., lead aprons and thyroid collar, leaded goggles, leaded gloves).
Use shielding (e.g., mobile shields, lead curtains), when possible.
Be aware of the position of the beam.
Know how to position themselves and the machine for the minimum dose.