治疗水平X射线辐射质的建立

摘要

Under the standard X ray radiation field six X -ray radiation quality bodies by using waterproof type ionization chamber were established .By fitting the half value layer , the homogeneous coefficient and the effec-tive energy are calculated , and the X -ray water absorbed dose calibration factor also was calculated .The re-sults show that the deviation of the recommended value of the semi -value layer of the six kinds of radiation is less than 1.8%, which meets the requirement of establishing the radiation quality , which provides the reference for the study of X -ray water absorbed dose .%用防水型电离室，在X射线标准辐射场下建立了六个X射线辐射质，通过拟合法得到了半值层，计算了同质系数及有效能量。并对X射线水吸收剂量校准因子进行初步的计算。结果表明：六种辐射质的半值层与检定规范推荐值偏差均在1．8％以内，满足建立辐射质的要求，可为X射线水吸收剂量的研究提供了参考。