ViewRay’s board of directors has appointed Chris A. Raanes as president and CEO, effective immediately.

Raanes had previously been serving as executive vice president and chief operating officer of Accuray, the Sunnyvale, Calif.-based radiation oncology company. He has a total of 14 years of experience as a senior executive in private and public medical devices companies.

At ViewRay, Raanes will be charged with driving worldwide commercial growth of the ViewRay system, which provides simultaneous radiotherapy delivery and continuous MRI for the treatment of cancer, according to the Cleveland-based company. Raanes succeeds Gregory M. Ayers, MD, PhD, who guided the system through early commercialization and marketing clearance from the FDA.