Varian Medical Systems positively radiates in electrotherapeutics. The company develops products related to the radiation treatment of cancer. It makes and services hardware and software products for treating cancer with radiotherapy, stereotactic radiosurgery, stereotactic body radiotherapy, stereotactic radiosurgery, and brachytherapy. Varian makes linear accelerators, simulators, and data management software, primarily for cancer radiotherapy. Other cancer treatment offerings include devices for brachytherapy, a treatment that protects healthy tissue through the use of radiation implants. In 2017 Varian spun off its X-ray unit, which makes imaging subsystems and X-ray-generating tubes, into a new public company named Varex Imaging.