ARAY

Accuray Inc

A maker of radiation therapy machines used to treat cancer. Its best-known products are the CyberKnife, a robotic system that aims high-dose radiation at tumors from many angles, and the TomoTherapy system, which delivers radiation in a spiral pattern. Founded in 1990, the company traces its roots to Stanford University, where the CyberKnife's inventor, John Adler, developed the idea of pairing a robotic arm with a linear accelerator to target tumors anywhere in the body.