Varian Medical Systems, Inc. designs, manufactures, sells, and services equipment and software products for treating cancer with radiotherapy, stereotactic radiotherapy, stereotactic body radiotherapy, stereotactic radiosurgery, and brachytherapy worldwide. Its Oncology Systems segment offers products, such as 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, doctors’ offices, and cancer care clinics. The company’s X-ray Products segment provides x-ray tubes for use in a range of applications, including computed tomography scanning, radiographic or fluoroscopic imaging, mammography, special procedures, and industrial applications; and flat panel digital image detectors for filmless x-ray imaging. It sells these products to imaging systems original equipment manufacturers that incorporate them into their medical diagnostic, dental, veterinary, and industrial imaging systems; independent service companies; and directly to end-users. 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 develops products and systems for delivering proton therapy; and technologies in the areas of digital X-ray imaging technology, volumetric and functional imaging, improved X-ray sources, and 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.