An X-ray is a quick, painless imaging test that uses a small amount of ionizing radiation to produce images of the inside of the body. It is commonly used to view bones, detect fractures, infections, and monitor the progress of healing.

X-rays are also used to evaluate the chest, lungs, abdomen, and other areas to help diagnose conditions such as pneumonia, arthritis, or blockages. It is a widely used and essential tool in medical diagnostics.