do you and if so how do you use particle accelerators to treat cancer? is it through radiotherapy or other means?

Question: do you and if so how do you use particle accelerators to treat cancer? is it through radiotherapy or other means?
- Keywords:
  cancer,
  particle accelerator,
  radiotherapy
Asked by Flora to Carsten on 13 Nov 2015.
- Carsten Welsch answered on 13 Nov 2015:
  
  We use them to accelerate ions to high energies. These can then penetrate into the body of the patient and deposit their energy at the exact position of the cancer, i.e. without negative effects on surrounding tissue. This is a rather new and advanced treatment method for some localized cancer types.

Question: do you and if so how do you use particle accelerators to treat cancer? is it through radiotherapy or other means?