Atomic resolution tomography reconstruction of tilt series based on a GPU accelerated hybrid input-output algorithm using polar Fourier transform

作者：Lu Xiangwen; Gao Wenpei; Zuo Jian Min^*; Yuan Jiabin

来源：Ultramicroscopy, 2015, 149: 64-73.

DOI：10.1016/j.ultramic.2014.10.005

• Three dimensional imaging
• Diffraction imaging
• TEM tomography
• Phase retrieval algorithms
• Atomic resolution
• GPU accelerated
• Polar Fourier transform

Advances in diffraction and transmission electron microscopy (TEM) have greatly improved the prospect of three-dimensional (3D) structure reconstruction from two-dimensional (2D) images or diffraction patterns recorded in a tilt series at atomic resolution. Here, we report a new graphics processing unit (CPU) accelerated iterative transformation algorithm (ITA) based on polar fast Fourier transform for reconstructing 3D structure from 2D diffraction patterns. The algorithm also applies to image tilt series by calculating diffraction patterns from the recorded images using the projection-slice theorem. A gold icosaheclral nanoparticle of 309 atoms is used as the model to test the feasibility, performance and robustness of the developed algorithm using simulations. Atomic resolution in 3D is achieved for the 309 atoms Au nanoparticle using 75 diffraction patterns covering 150 rotation. The capability demonstrated here provides an opportunity to uncover the 3D structure of small objects of nanometers in size by electron diffraction.

• 出版日期2015-2
• 单位南京航空航天大学