Ludewigt B A, Chu W T, Phillips M H, Renner T R
Lawrence Berkeley Laboratory, University of California, Berkeley 94720.
Med Phys. 1991 Jan-Feb;18(1):36-42. doi: 10.1118/1.596696.
A new beam line for radiotherapy and radiosurgery with accelerated helium-ion beams has been set up at the Bevalac. The new treatment room has been equipped with a very precise patient positioner in order to utilize the superior dose localization properties of light-ion beams. The beam spreading and shaping system is described, the trade-offs involved in positioning the beam modifying devices are discussed, and the physical properties of the generated radiation fields are reported. The Bragg peak modulation by axial beam stacking employing a variable range shifter is explained and the control system including beam monitoring and dosimetry is presented.
劳伦斯伯克利国家实验室的贝伐粒子加速器中心已建成一条用于放射治疗和放射外科的新型氦离子加速束线。新的治疗室配备了非常精确的患者定位仪，以利用轻离子束卓越的剂量定位特性。本文描述了束流扩展和整形系统，讨论了放置束流修正装置时的权衡取舍，并报告了所产生辐射场的物理特性。解释了采用可变射程移位器通过轴向束流叠加进行布拉格峰调制的方法，并介绍了包括束流监测和剂量测定在内的控制系统。
