A study of quality of bremsstrahlung spectra reconstructed from transmission measurements.
A study of quality of bremsstrahlung spectra reconstructed from transmission measurements.
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根据透射测量重建轫致辐射光谱的质量的研究。
DOI：
10.1118/1.596567
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发表时间：
1990
期刊：
影响因子：
3.8
通讯作者：
C. Giacco
中科院分区：
文献类型：
--
作者：
A. Piermattei;G. Arcòvito;L. Azario;C. Bacci;L. Bianciardi;E. D. Sapio;C. Giacco
本文将轫致辐射谱的数值重建方法应用于模拟数据的分析。结果表明，该方法可以可靠地重建最大能量高达10 MeV的x射线能谱。用该方法对5个直线加速器的铝传输数据进行了分析，以确定分数能量影响。斯宾塞-阿蒂克斯水/空气停止功率比（SS.A.）的值。w，空气，报告为比率TPR20的函数，与计算结果很好地一致。质量指标值与放射治疗中使用的x射线光束的平均入射能量相关。该实验装置还提供了关于离轴光束软化效应的信息，可用于临床计算机剂量学校正传统的零场大小组织最大比值。
A numerical method for the reconstruction of bremsstrahlung spectra has been applied to the analysis of simulated data. The method is found to be reliable in reconstructing x-ray spectra of maximum energy up to 10 MeV. Measurements of aluminum transmission data carried out for five linear accelerators have also been analyzed by this method to determine the fractional energy fluence. The values of the Spencer-Attix water/air stopping power ratio, SS.A. w,air, reported as a function of the ratios TPR20 10, are in good agreement with computed results. Quality index values were correlated to mean incident energies of x-ray beams used in radiotherapy. The experimental setup has also provided information regarding the softening effect on the off-axis beam, which can be used in clinical computer dosimetry to correct conventional zero field size tissue maximum ratio.