Absorption tomography has been a unique technique for 3D imaging in many scientific research and applications. However, the use of polychromatic x‐ray sources for quantitative tomography has been limited due to the well‐known beam hardening effect. In this article, we will describe the theoretical details of a new technique for quantitative tomography using polychromatic x‐rays. The technique incorporates the full spectral information of the incident beam into the tomographic reconstruction process. Consequently, beam‐hardening effects are eliminated and the result is quantitative. We will also demonstrate the technique experimentally using a single‐component specimen. This technique promises great opportunities for laboratory‐based x‐ray sources to be used in quantitative applications.

中文翻译：

---

使用单组分样品的多色X射线可完全消除定量吸收层析成像中的束硬化效应

吸收层析成像已成为许多科学研究和应用中用于3D成像的独特技术。但是，由于众所周知的光束硬化效果，使用多色X射线源进行定量X线断层摄影术受到了限制。在本文中，我们将描述使用多色X射线进行定量层析成像的新技术的理论细节。该技术将入射光束的全部光谱信息合并到层析成像重建过程中。因此，消除了束硬化效应，结果是定量的。我们还将使用单组分样本通过实验演示该技术。这项技术为将基于实验室的X射线源用于定量应用提供了巨大的机会。