Complicated irradiation setup inside the water for intraoperative electron dosimetry suggests the plastic phantoms as an alternative medium. Depth scaling (c_pl) and fluence scaling (h_pl) factors for intraoperative electron dosimetry inside the PMMA phantom were measured in this study.

c_pl and h_pl values were obtained at electron energies of 6, 8, 10 and 12 MeV through ionometric measurement.

Results showed that the mean c_pl value (averaged over all energies) for intraoperative electron beam would be 0.960 (about 2% higher than reported value of 0.941 for conventional one). The mean h_pl value for intraoperative electron beam at Z_ref was obtained as 0.954, which is about 5% lower than the reported values for conventional electron beam. The reported scaling factors, which are valid for a particular plastic phantom (PMMA) and specific type of dedicated IOERT accelerator (LIAC12), can reproduce the directly measured dose and depth dose distribution inside the water.

用于术中电子剂量测定的水中复杂的辐射设置表明，塑料体模可作为替代介质。在这项研究中，对术中电子剂量测定中PMMA体模内部的深度定标（c _pl）和注量定标（h _pl）因子进行了测量。

通过电离测量在电子能量为6、8、10和12 MeV时获得c _pl和h _pl值。

结果表明，术中电子束的平均c _pl值（所有能量的平均值）将为0.960（比传统方法的报道值0.941高约2％）。术中电子束在Z _ref处的平均_hpl值为0.954，比传统电子束的报告值低约5％。所报告的比例因子对特定的塑料体模（PMMA）和特定类型的专用IOERT加速器（LIAC12）有效，可以重现直接测量的剂量和深度剂量在水中的分布。