About Mayo Clinic's program

Program leadership

Robert L. Foote, M.D.


Robert L. Foote, M.D., Proton Beam Therapy Program Medical Director, Chair, Radiation Oncology

Steven E. Schild, M.D.


Steven E. Schild, M.D., Chair, Radiation Oncology

Sameer R. Keole, M.D.


Sameer R. Keole, M.D., Proton Beam Therapy Program Medical Director, Radiation Oncology

Mayo Clinic's Proton Beam Therapy Program is a new addition to the Mayo Clinic Cancer Center, the only National Cancer Institute-designated comprehensive cancer center with a multisite presence, with locations in Arizona, Florida and Minnesota.

The program differs from most other proton therapy programs in the United States because it exclusively features intensity-modulated proton beam therapy using pencil beam scanning.

This technology is an advance over current radiation and other proton therapy methods. The pencil beam conforms more closely to the tumor, better sparing surrounding healthy tissue from harm, and "painting" small spots of protons back and forth through a tumor. The accelerated protons fill the depth and contour of the tumor, allowing advantages over most other proton therapy systems, including:

  • Greater control of radiation doses
  • Shorter treatment times
  • Reduced side effects

The precision of pencil beam scanning makes it especially beneficial in treating tumors adjacent to critical and sensitive organs and structures, such as the brain, eye and spinal cord.

All eight treatment rooms at Mayo Clinic's two facilities feature this advanced technology.


One of Mayo Clinic's priorities is to continue to advance the science of proton therapy. Mayo Clinic proton beam therapy researchers will:

  • Conduct clinical studies
  • Enter patients on a registry to measure outcomes and improve care models and services for cancer patients
  • Foster collaborative research with other centers worldwide

How you can help

Mayo Clinic is a not-for-profit organization and leader in medical care, research and education. We are funding our Proton Beam Therapy Program with our own investments and the help of generous benefactors.

We believe proton beam therapy is a powerful cancer treatment that will help many people survive their cancer with fewer side effects and complications. Thanks to our benefactors, Mayo Clinic Cancer Center is making exciting strides in cancer therapy.

Join us to create a lasting legacy in the battle against cancer by funding the Mayo Clinic Proton Beam Therapy Program. Your philanthropic investment will place you among visionary supporters improving cancer therapy for generations to come.

Find out more

Nov. 22, 2017