本文基于电离法对X射线水吸收剂量进行了测量与研究，确定了管电压在100 kV以上的X水吸收剂量射线测量方法。在基准辐射场建立了管电压为100 kV的治疗水平X射线辐射质，通过引用文献插值得到水与空气的质能吸收系数之比和PTW 30013型电离室的扰动因子。基于计算公式得到PTW 30013型电离室的水吸收剂量校准因子，同时在水箱中测量了该辐射质下水深2 cm处的X射线水吸收剂量。%The article is based on the ionization method to measure and study X-ray absorbed dose , and deter-mined the measurement methods of X-ray water absorbed dose in tube voltage higher than 100 kV. Tube volt-age of 100 kV treatment level of X ray radiation quality is established in reference radiation fields, the water and air mass energy absorption coefficient ratio and PTW 30013 type ionization chamber of the disturbance fac-tor are obtained by data of the reference paper and the Interpolation method. The water absorption dose calibra-tion factor of the PTW 30013 type ionization chamber is obtained based on the calculation formula, and the X- ray water absorbed dose is measured at the depth of 2 cm in the water tank.
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