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低能X射线标准辐射场下背散射因子的测量与研究

Ying LIU,Jin-jie WU,Zhen-jie ZHOU,Xi KANG,Cheng-ze LI,Hai-yan DU

Acta Metrologica Sinica（2016）

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Abstract
在40 ～60 kV的治疗水平辐射质下,对背散射因子进行了测量实验研究.所测得的背散射因子可用于相同条件下的水吸收剂量的计算.实验结果显示,在不同模体厚度下,随着模体厚度的增加,测量点处的背散射因子呈现先增大后稳定的趋势;在不同辐射野下,随着辐射野面积的增大,测量点处的背散射因子呈现增大的趋势.
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