Varian Medical Systems, Inc. is engaged in the design, manufacture, sale and service of equipment and software products for treating cancer with radiotherapy, stereotactic radiotherapy, stereotactic body radiotherapy (SBRT), stereotactic radiosurgery (SRS) and brachytherapy. The Company also designs, manufactures, sells and services x-ray tubes for original equipment manufacturers (OEMs); replacement x-ray tubes, and flat panel digital image detectors for filmless x-ray imaging (flat panel detectors or digital image detectors) in medical, dental, veterinary, scientific and industrial applications. It designs, manufactures, sells and services linear accelerators, digital image detectors, image processing software and image detection products for security and inspection purposes. In March 2011, it acquired a privately-held supplier of devices for delivery of brachytherapy treatment of cancer. In August 2012, the Company established a subsidiary, Varian Medical Systems Korea.