Steidley K D, Rosen C W
Department of Radiation Oncology, St. Barnabas Medical Center, Livingston, New Jersey 07039.
Med Phys. 1990 May-Jun;17(3):474-80. doi: 10.1118/1.596487.
Both the design considerations and the dosimetric properties of the Siemens Model 5800 linear accelerator are discussed. This unit is of such an energy (3.3 MV) as to imitate Cobalt-60 teletherapy depth doses. A linear relation of dmax to depth dose at low energies was found for various wave guides and targets. The energy of the unit can be characterized by its nominal accelerating potential of 2.70 MV, its d80 of 5.3 cm, its first half-value layer of 0.8 cm lead and the measured energy of the electron beam at 3.3 MeV. The following selected commissioning aspects are reported: central axis depth dose, relative output factors, beam profiles, wedge factors, virtual source position, back scatter factors, penumbra and build-up region.
讨论了西门子5800型直线加速器的设计考量和剂量学特性。该装置的能量（3.3兆伏）可模拟钴-60远距离治疗的深度剂量。对于各种波导和靶材，在低能量下发现了最大剂量深度与深度剂量的线性关系。该装置的能量可通过其2.70兆伏的标称加速电位、5.3厘米的80%剂量深度、0.8厘米铅的第一半价层以及3.3兆电子伏的电子束测量能量来表征。报告了以下选定的调试方面：中心轴深度剂量、相对输出因子、射野轮廓、楔形因子、虚拟源位置、反向散射因子、半值层和建成区。
