Maughan R L, Powers W E, Blosser H G
Gershenson Radiation Oncology Center, Harper Hospital, Detroit, Michigan.
Med Phys. 1994 Jun;21(6):779-85. doi: 10.1118/1.597337.
The physical and clinical specifications of a neutron therapy facility utilizing a superconducting cyclotron are presented. The cyclotron and its support system are described. Details of the operation of the cyclotron in a hospital environment are given; the requirements of the helium liquifier and cryogenic system are described together with a summary of its mode of operation. The simplicity of the cyclotron control system is discussed. The physical characteristics of the neutron beam are described. The central axis percent depth dose curve is equivalent to that of a 4 MV x-ray beam. The depth of maximum dose occurs at approximately 9 mm depth and the surface dose is between 40% and 45%. The multirod collimator allows for the production of irregularly shaped fields of size up to 26.5 x 30 cm, without excessive exposure to operating personnel.
介绍了使用超导回旋加速器的中子治疗设施的物理和临床规格。描述了回旋加速器及其支持系统。给出了回旋加速器在医院环境中的运行细节；描述了氦液化器和低温系统的要求及其运行模式总结。讨论了回旋加速器控制系统的简易性。描述了中子束的物理特性。中心轴百分深度剂量曲线与4兆伏X射线束的曲线相当。最大剂量深度约在9毫米深度处，表面剂量在40%至45%之间。多棒准直器可产生尺寸达26.5×30厘米的不规则形状射野，且不会使操作人员受到过多照射。
