Jones D
Med Phys. 1981 Mar-Apr;8(2):239-41. doi: 10.1118/1.594943.
The perturbation correction factors for a 0.03 cc parallel plate chamber and a 0.6 cc cylindrical ionization chamber have been compared. The current from these ion chambers was measured in electron beams of energy in the range 7 to 12 MeV and in a cobalt-60 gamma ray beam. It is concluded that there is no difference between the perturbation correction factor for these two chambers. A significant polarity effect was observed for the parallel plate chamber, which was a function of energy and depth in the phantom. This work supports the ICRU recommendation for displacement correction.
已对一个0.03立方厘米的平行板电离室和一个0.6立方厘米的圆柱形电离室的扰动校正因子进行了比较。在能量范围为7至12兆电子伏的电子束以及钴 - 60伽马射线束中测量了这些电离室的电流。得出的结论是，这两个电离室的扰动校正因子之间没有差异。在平行板电离室中观察到了显著的极性效应，该效应是模体中能量和深度的函数。这项工作支持了国际辐射单位与测量委员会（ICRU）关于位移校正的建议。
