Method for Retrieval of the Three-Dimensional Object Potential by Inversion of Dynamical Electron Scattering
Method for Retrieval of the Three-Dimensional Object Potential by Inversion of Dynamical Electron Scattering
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DOI：
10.1103/physrevlett.109.245502
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发表时间：
2012-12-10
影响因子：
8.6
通讯作者：
Koch, Christoph T.
中科院分区：
文献类型：
--
作者：
Van den Broek, Wouter;Koch, Christoph T.
通过将多层算法重新构建为人工神经网络，可以反转快速电子的动态散射，从而能够迭代检索三维物体电势。这允许对 CCD 的调制传递函数、部分空间和时间相干性以及通过吸收势的非弹性散射进行非启发式处理。此外，可以使用有关原子势形状以及物体的稀疏性和正性的先验知识。该方法在 40 kV 记录的模拟明场图像上进行了演示。
Dynamical scattering of fast electrons can be inverted by recasting the multislice algorithm as an artificial neural network, enabling the iterative retrieval of the three-dimensional object potential. This allows a nonheuristic treatment of the modulation transfer function of the CCD, partial spatial and temporal coherence, and inelastic scattering through an absorptive potential. Furthermore, prior knowledge about the atomic potential shape and the sparseness and positivity of the object can be used. The method is demonstrated on simulated bright field images recorded at 40 kV.