使用实验室规模装置的单色计算机断层成像：概念验证
Monochromatic computed tomography using laboratory-scale setup: proof-of-concept
摘要：
在这篇文章中，我们证明了高度单色全场X射线吸收近边缘结构的断层扫描的可行性，使用实验室规模的约翰型X射线吸收光谱仪的基础上，传统的X射线管源。在此概念验证中，通过使用嵌入元素Se、Na $_2$ SeO $_3$和Na $_2$ SeO $_4$的体模，我们证明了不同氧化态的Se的三维分布可以通过吸收边衬度断层扫描从体模矩阵和彼此进行映射和区分。所提出的方法允许使用低亮度X射线源在毫米级样品中进行化学形态的体积分析，并且代表了包括生物和化学在内的许多领域中的材料工程和研究的新分析工具。
英文摘要：
In this article, we demonstrate the viability of highly monochromatic full-field X-ray absorption near edge structure based tomography using a laboratory-scale Johann-type X-ray absorption spectrometer based on a conventional X-ray tube source. In this proof-of-concept, by using a phantom embedded with elemental Se, Na$_2$SeO$_3$, and Na$_2$SeO$_4$, we show that the three-dimensional distributions of Se in different oxidation states can be mapped and distinguished from the phantom matrix and each other with absorption edge contrast tomography. The presented method allows for volumetric analyses of chemical speciation in mm-scale samples using low-brilliance X-ray sources, and represents a new analytic tool for materials engineering and research in many fields including biology and chemistry.
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