Operations Inside the Mayo Clinic

Radiologist Val J. Lowe, director of the cancer imaging program at the Mayo Clinic cancer center, compares a CT scan to a choline C-11 PET scan of a patient with recurrent prostate cancer at the Mayo Clinic medical center in Rochester, Minnesota, U.S., on Wednesday, Jan. 30, 2013. The Mayo Clinic, a nonprofit specializing in medical care, research and education, announced in January that it will join UnitedHealth Group Inc., the largest U.S. provider of medical coverage, in a research alliance designed to merge insurance records and medical data to find more efficient ways to deliver care. Photographer: Ariana Lindquist/Bloomberg via Getty Images