What are x-rays good for?

Imaging & treatment: x-rays are useful in my field because their high penetration allows imaging of deeper tissues within the body than normal light does. This allows for the images seen on chest x-rays and CT scans. x-rays can also cause damage to tissue. This is good for us if we are trying to kill cancer cells in a small area. They can also harm normal healthy tissue if exposed to too much, so must use wisely

A variety: of diagnostic and therapeutic applications in medical imaging and other specialties, too extensive for a short answer.