Lam K L, Muthuswamy M S, Ten Haken R K
Department of Radiation Oncology, University of Michigan, Ann Arbor 48109-0010, USA.
Med Phys. 1998 Mar;25(3):334-8. doi: 10.1118/1.598203.
A simple noninvasive method is described for determining the backscatter to a monitor chamber of a medical accelerator based on the measurement of charge deposited in the target. This method is compared quantitatively to the more elaborate telescopic method for photon beams of 6 MV and 15 MV on linear accelerators having mica and Kapton monitor chambers. The new target charge method gives results consistent with the telescopic method to within 0.3%.
描述了一种简单的非侵入性方法，该方法基于对靶中沉积电荷的测量来确定医用加速器监测室的反向散射。将该方法与在具有云母和聚酰亚胺监测室的直线加速器上针对6 MV和15 MV光子束的更精细的望远镜法进行了定量比较。新的靶电荷法给出的结果与望远镜法一致，误差在0.3%以内。
