STOCKHOLM, Sweden--(BUSINESS WIRE)--May 3, 2006--The University of Pittsburgh Medical Center (UPMC), one of the leading radiosurgery centers in the U.S, announced today their on-going relationship with Elekta (STO:EKTAB) that will extend UPMC’s leadership in the fast-growing field of extracranial radiosurgery utilizing the Elekta Axesse(TM) system, the only 6D robotic image guided radiosurgery system optimized for treatment of the spine.