Radiation to cancer patients in a ‘FLASH’

 https://www.llnl.gov/news/radiation-cancer-patients-flash

"linear induction accelerators (LIAs) to deliver effective, targeted doses of “FLASH” radiation to cancer patients. The new technique selectively kills cancer cells with minimal damage to healthy cells... can be built only 3 meters long... produces four beamlets placed symmetrically around the patient. By controlling the magnets, the researchers can focus a steerable FLASH-RT beam that could prove transformative in oncology"