1. External Radiation Therapy:
This method uses a large machine to direct energy waves directly at the tumor.
Special shields may be used to protect surrounding healthy tissues. Treatments
are painless and typically last a few minutes.
2. Internal Radiation Therapy:
This method delivers high doses of radiation inside the body, close to the
cancer, over a shorter period compared to external therapy. The radiation
source may be swallowed, injected, or implanted as radioactive
"seeds" or capsules. Some implants remain temporarily, while others
are permanent.