PHOENIX & ROCHESTER, Minn.--(BUSINESS WIRE)--Mayo Clinic today announced plans to establish the Mayo Clinic Proton Beam Therapy Program as part of Mayo’s national three-site cancer center in Minnesota, Arizona and Florida. The new program will employ intensity modulated proton therapy — based on pencil beam scanning — which is a more precise form of proton therapy treatment that allows greater control over radiation doses, shorter treatment times and fewer side effects. It is also believed to be more cost effective in selected patients.