X-ray phase computed tomography (CT) is used to observe the inside of light materials. In this paper, we report a new study to develop and test a laboratory assembled X-ray phase CT system that comprises an X-ray Lau interferometer, a rotating Mo anode X-ray tube, and a detector with high spatial resolution. The system has a high spatial resolution lower than 10μm, which is evaluated by differentiating neighbouring carbon fibres in a polymer composite material. The density resolution is approximately 0.035 g/cm3, which enables to successfully distinguish the high-density polyethylene (HDPE, 0.93 g/cm3) from the ultra-low-density polyethylene (ULDPE, 0.88 g/cm3) in the sample. Moreover, the system can be switched to operate on another mode based on a Talbot–Lau interferometer that provides a wider field of view with a moderate spatial resolution (approximately 100μm). By analyzing sample images of the biological, this study demonstrates the feasibility and advantages of using hybrid configuration of this X-ray phase CT system.

中文翻译：

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使用 Lau 和 Talbot-Lau 干涉仪的混合配置开发 X 射线相位 CT

X 射线相位计算机断层扫描 (CT) 用于观察轻质材料的内部。在本文中，我们报告了一项新研究，以开发和测试实验室组装的 X 射线相位 CT 系统，该系统包括 X 射线 Lau 干涉仪、旋转钼阳极 X 射线管和具有高空间分辨率的探测器。该系统具有低于 10μm 的高空间分辨率，这是通过区分聚合物复合材料中的相邻碳纤维来评估的。密度分辨率约为 0.035 g/cm3，可成功区分样品中的高密度聚乙烯（HDPE，0.93 g/cm3）和超低密度聚乙烯（ULDPE，0.88 g/cm3）。而且，该系统可以切换到基于 Talbot-Lau 干涉仪的另一种模式，提供更宽的视野和中等空间分辨率（约 100μm）。通过分析生物样本图像，本研究证明了使用这种 X 射线相位 CT 系统的混合配置的可行性和优势。