Triebenberg Laboratory, Institute of Structure Physics, Technische Universität Dresden, 01062 Dresden, Germany.
Ultramicroscopy. 2014 Jan;136:15-25. doi: 10.1016/j.ultramic.2013.07.016. Epub 2013 Jul 30.
Tomographic techniques play a crucial role in imaging methods such as transmission electron microscopy (TEM) due to their unique capabilities to reconstruct three-dimensional object information. However, the accuracy of the two standard tomographic reconstruction techniques, the weighted back-projection (W-BP) and the simultaneous iterative reconstruction technique (SIRT) is reduced under common experimental restrictions, such as limited tilt range or noise. We demonstrate that the combination of W-BP and SIRT leads to an improved tomographic reconstruction technique: the weighted SIRT. Convergence, resolution and reconstruction error of the W-SIRT are analyzed by a detailed analytical, numerical, and experimental comparison with established methods. Our reconstruction technique is not restricted to TEM tomography but can be applied to all problems sharing single axis imaging geometry.
层析技术在透射电子显微镜（TEM）等成像方法中起着至关重要的作用，因为它们具有独特的能力来重建三维物体信息。然而，在常见的实验限制下，如有限的倾斜范围或噪声，两种标准层析重建技术——加权反向投影（W-BP）和同时迭代重建技术（SIRT）的准确性会降低。我们证明，W-BP 和 SIRT 的组合会导致一种改进的层析重建技术：加权 SIRT。通过与已有方法的详细分析、数值和实验比较，分析了 W-SIRT 的收敛性、分辨率和重建误差。我们的重建技术不仅限于 TEM 层析，还可以应用于具有单轴成像几何形状的所有问题。
