Varian Medical Systems, Inc. designs, manufactures, sells, and services medical devices and software for treating cancer with radiotherapy, radiosurgery, proton therapy, and brachytherapy worldwide. The company’s Oncology Systems segment offers linear accelerators, brachytherapy afterloaders, treatment simulation and verification equipment, and accessories; and information management, treatment planning, and image processing software. This segment serves university research and community hospitals, private and governmental institutions, healthcare agencies, physicians’ offices, and cancer care clinics. Its X-ray Products segment provides X-ray imaging components to large imaging system original equipment manufacturers (OEMs) for use in radiographic or fluoroscopic imaging, mammography, special procedures, computed tomography, and industrial applications; and X-ray tubes and flat panel digital image detectors to small OEMs, independent service companies, and end-users for filmless X-ray imaging. The company also designs, manufactures, sells, and services Linatron X-ray accelerators, imaging processing software, and image detection products for security and inspection purposes, such as cargo screening at ports and borders, and nondestructive examination in various applications. In addition, it offers products and systems for delivering proton therapy; and technologies in the areas of digital X-ray imaging technology, volumetric and functional imaging, and improved X-ray sources, as well as technology for security and cargo screening applications. The company was formerly known as Varian Associates, Inc. and changed its name to Varian Medical Systems, Inc. in April 1999. Varian Medical Systems, Inc. was founded in 1948 and is headquartered in Palo Alto, California.

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