VAR
Varian Medical Systems, Inc.
A maker of radiation therapy machines that help doctors treat cancer, Varian builds the linear accelerators and software—including its well-known TrueBeam and Halcyon systems—used in hospitals and cancer centers around the world to aim precise beams at tumors. The company grew out of Varian Associates, the firm Russell and Sigurd Varian founded after inventing the klystron tube, a breakthrough that made radar and later medical linear accelerators possible. That founding physics legacy lives on today in machines that deliver radiation with remarkable accuracy to patients fighting cancer.
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