Mayo Clinic staff and local media gathered to see two new gantry cylinders hoisted and lowered into the Andersen Building in Rochester. The gantries each weigh over 15 tons and are part of the radiation oncology department's proton beam therapy program expansion. They will enable radiation oncologists to more effectively treat people with cancer because the new equipment rotates 360 degrees and features real-time imaging. The proton beams precisely target and kill cancer cells without harming