Basics of X-ray physics
This is a short tutorial on radiation physics and safety.
The tutorial describes how X-rays are produced and how they interact with the body in forming a radiographic image. X-ray safety issues are briefly discussed.
A knowledge of these subjects is complementary to knowledge of X-ray interpretation.
Tutorial key points
- X-rays are produced de novo as needed
- No radioactive substance is used
- X-rays travel in straight lines and are attenuated according to density and thickness of body tissues
- X-rays are potentially hazardous
- Hospital staff have a duty to use X-rays responsibly