Curve Fitting in Expanding Measuring Range of Ionization Chamber 曲线拟合在扩展电离室量程范围方面的应用
Methods The precision of the inverse intensity modulated radiation therapy planning system was examined by measuring with film and ionization chamber including shape coincidence of multileaf collimater ( MLC ), absolute absorb dose in the defined space point, coincidence rate of isodose curve and dose intensity distribution. 方法用胶片和电离室测量,检测MLC的形状符合度、空间点的绝对吸收剂量、等剂量曲线符合度、剂量强度分布符合度,来验证逆向调强治疗计划的精度。
The project has based the definition and conception on the new recommendations of the ICRP and ICRU. The theory and method of measuring the Directional Absorbed Dose rate by an extrapolation ionization chamber with parallel plane have been researched. 依踞ICRP和ICRU最新推荐的外照射实用量的定义和概念,研究了用平行平板外推电离室刻度定向吸收剂量率的理论和方法。