31. Installation of the first 4 radiotherapy but it lasted until the eighties of last century before dedicated Linac radiosurgery became a reality. 32. Latest generation Linacs are capable of achieving extremely narrow beam geometries, such as 0.15 to 0.3 mm. 33. At the end of linac , the particles are accelerated to 400 MeV, or about 70 % of the speed of light. 34. Leptons ( electrons or positrons ) were pre-accelerated to 450 MeV in the linear accelerator " LINAC -II ". 35. The technique involves exposing a sample of material to a beam of highly accelerated electrons, where the beam is generated by a linac . 36. For conformal radiotherapy the MLC allows conformal shaping of the linear accelerator ( LINAC ) beam to match the borders of the target tumour. 37. Medical grade linacs accelerate electrons using a klystron and a complex bending magnet arrangement which produces a beam of 6-30 MeV energy. 38. 225 Ac was first produced artificially at the Institute for Transuranium Elements ( ITU ) in Germany using a cyclotron and at linac in 2000. 39. The first system is the linear particle accelerator LINAC 2 generating 50-MeV protons, which feeds the Proton Synchrotron Booster ( PSB ). 40. Using a modified Linac , the first patient in the United States was treated in Boston Brigham and Women's Hospital in February 1986.
