K.C.W. Consatti, W. S. Santos, J. V. Valença, M. Yoshizumi
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引用次数: 0
摘要
在放射学中,了解x射线光谱特征可以估计患者的吸收剂量,提高图像质量。在本研究中,使用MCNPX代码提出了一个x射线发生器,并将模拟的光谱与AAPM Task Group 195提供的数据进行了比较,结果显示其百分比差异为8.7%。此外,生成了几个x射线光谱,并与商用软件(如expecgen和SpekCalc)获得的光谱进行了比较。与SpekCalc相比,百分比差异约为13%,与expecgen相比为8%。这些光谱之间的主要差异集中在特征峰区域,如果进行电子束能量、目标角度或过滤厚度的变化,则它们之间的差异是独立的。
Validation and study of different parameters in the simulation of diagnostic X-ray spectra using the MCNPX code
In radiology, knowing the X-ray spectrum characteristics makes it possible to estimate the absorbed dose in the patient and to improve image quality. In this study, an X-ray generator was proposed using the MCNPX code and to validate it, the simulated spectrum was compared to the data provided from AAPM Task Group 195, which resulted in a percentage difference of 8.7%. Furthermore, several X-ray spectra were generated and compared to the spectra obtained from commercially available softwares as xpecgen and SpekCalc. The percentage differences were of the order of 13% in comparison with SpekCalc and 8% with xpecgen. The major differences obtained between those spectra were concentrated in the region of characteristic peaks, independently if variations in electron beam energy, target angle or filtration thickness were performed.