Varian Medical Systems is an American radiation oncology treatments and software maker based in Palo Alto, California. Their medical devices include linear accelerators (LINACs) and software for treating cancer and other medical conditions with radiotherapy, radiosurgery, proton therapy, and brachytherapy.
The American company Varian, which supplies used Truebeam linear accelerators for radiation therapy to Russian oncology clinics, is now required to obtain an export license from the US authorities, a process that takes a minimum of three months.