Small accelerators used in radiotherapy
In teleradiotherapy, small linear accelerators are increasingly used in order to provide gamma rays or electrons whose energies are higher than the gamma rays emitted by cobalt 60: up to 30 MeV instead of 1 MeV. Besides the advantage of higher and adjustable energy, accelerators are used to direct the rays on the tumor with much higher accuracy than cobalt. In 2003, there were currently 260 accelerators in France against 104 telecobalt.
ASN 2003 Report