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Quality indexes based on water measurements for low and medium energy x-ray beams: A theoretical study with PENELOPE

机译：基于低电极能量X射线束的水测量的质量指标：佩内洛普的理论研究

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Purpose: To study the use of quality indexes based on ratios of absorbed doses in water at two different depths to characterize x-ray beams of low and medium energies. Methods: A total of 55 x-ray beam spectra were generated with the codes XCOMP5R and SPEKCALC and used as input of a series of Monte Carlo simulations performed with PENELOPE, in which the percentage depth doses in water and the kQ,Q0 factors, defined in the TRS-398 protocol, were determined for each beam. Some of these calculations were performed by simulating the ionization chamber PTW 30010. Results: The authors found that the relation between kQ,Q0 and the ratios of absorbed doses at two depths is almost linear. A set of ratios statistically compatible with that showing the best fit has been determined. Conclusions: The results of this study point out which of these ratios of absorbed doses in water could be used to better characterize x-ray beams of low and medium energies.
机译：目的：研究基于两个不同深度的吸收剂量的比率研究使用质量指标，以表征低和中间能量的X射线束。 方法：使用Xcomp5R和Spekcalc的代码产生总共55个X射线光谱谱，并用作用Penelope进行的一系列蒙特卡罗模拟的输入，其中水中的百分比深度剂量和KQ，Q0因子，定义 在TRS-398协议中，针对每个光束确定。 通过模拟电离室PTW 30010来执行这些计算中的一些。结果：作者发现，KQ，Q0和吸收剂量比在两个深度之间的关系几乎是线性的。 已经确定了一系列统计上兼容的比率已经确定了显示最佳拟合。 结论：本研究的结果指出，在水中吸收剂量的这些比例中的哪一种可用于更好地表征低和中间能量的X射线束。

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