X-ray microscopy is an essential imaging method in many scientific fields, which can be extended to three-dimensional (3D) using tomography. Recently, metal halide perovskite (MHP) nanomaterials have become a promising candidate for X-ray scintillators, due to their high light yield, high spatial resolution, and easy fabrication. Tomography requires many projections and therefore scintillators with excellent stability. This is challenging for MHPs, which often suffer from fast degradation under X-ray irradiation and ambient conditions. Here, we demonstrate that MHP scintillators of CsPbBr₃ nanowires (diameter: 60 nm, length: 5–9 µm) grown in anodized aluminum oxide (CsPbBr₃ NW/AAO) have sufficient stability for X-ray micro-tomography. A tomogram was taken with a Cu X-ray source over 41 h (dose 4.2 Gy_air). During this period the scintillator brightness fluctuated less than 5%, which enabled a successful reconstruction. A long-term study with 2 weeks of continuous X-ray exposure (37.5 Gy_air) showed less than 14% fluctuations in brightness and no long-term degradation, despite variations in the ambient relative humidity from 7.4 %RH to 34.2 %RH. The resolution was stable at (180 ± 20) 1pmm⁻¹, i.e., about 2.8 micron. This demonstrates that CsPbBr₃ NW/AAO scintillators are promising candidates for high resolution X-ray imaging detectors.

X 射线显微镜是许多科学领域必不可少的成像方法，可以使用断层扫描将其扩展到三维 (3D)。最近，金属卤化物钙钛矿（MHP）纳米材料因其高光产率、高空间分辨率和易于制造而成为X射线闪烁体的有希望的候选材料。断层扫描需要许多投影，因此需要具有出色稳定性的闪烁体。这对 MHP 来说是一个挑战，因为 MHP 通常在 X 射线照射和环境条件下会快速降解。在这里，我们展示了在阳极_氧化铝（CsPbBr ₃NW/AAO) 对 X 射线显微断层扫描具有足够的稳定性。用 Cu X 射线源在 41 小时内拍摄断层照片（剂量 4.2 Gy_空气）。在此期间，闪烁体亮度波动小于 5%，这使得重建成功。_{一项为期 2 周的连续 X 射线照射（37.5 Gy空气}）的长期研究表明，尽管环境相对湿度从 7.4 %RH 变化到 34.2 %RH，但亮度波动小于 14%，并且没有长期退化。分辨率稳定在(180±20)1pmm ^-1，即约2.8微米。这表明 CsPbBr ₃ NW/AAO 闪烁体是高分辨率 X 射线成像探测器的有希望的候选者。