Arthur Kay

Vision RT Ltd. develops technology for radiation therapy. It offers AlingRT, GateCT, GateRT, SRS Module and third party interfacing. The firm provides solutions for the radiotherapy market, with products installed in some of the treatment centers. The company was founded by Ivan Daniel Meir, Peter Kalms, and Norman Ronald Smith in 2001 and is headquartered in London, the United Kingdom.

Varian Medical Systems, Inc. engages in the manufacture of medical devices and software for treating cancer and other medical conditions. It operates through the Oncology Systems and Proton Solutions segments. The Oncology Systems segment designs, manufactures, sells, and services hardware and software products for treating cancer with conventional radiation therapy, and advanced treatments. The Proton Solutions segment delivers proton therapy, a form of external beam radiotherapy using proton beams for the treatment of cancer. The company was founded by William Hansen, Edward Ginzton, Russell Varian, and Sigurd Varian in 1948 and is headquartered in Palo Alto, CA.