External beam radiation therapy
External beam radiation therapy is radiation delivered from outside the body and directed at your cancer site in the brain or spine.
External beam radiation therapy is a very common treatment option, and many people with cancer have it. It’s painless, and you don’t see or feel the actual treatment. In most cases, you’ll be able to continue with your daily routine after each treatment.
How does external beam radiation therapy work?
Depending upon the treatment location, different energies of radiation are used.
- Low-energy radiation doesn’t penetrate deeply into the body, and it’s mainly used to treat surface sites (particularly on or just under the skin)
- High-energy radiation is used to treat deeper cancer sites