Journal
JOURNAL OF SYNCHROTRON RADIATION
Volume 25, Issue -, Pages 1847-1859Publisher
INT UNION CRYSTALLOGRAPHY
DOI: 10.1107/S1600577518013681
Keywords
discrete algebraic reconstruction technique (DART); missing wedge; over-segmentation; tomography; limited-angle
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Funding
- National Key Research and Development Program of China [2016YFA0400902, 2017YFA0402904]
- National Natural Science Foundation of China (NSFC) [11475175, 11405175, 11275204, 11775224]
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Full angular rotational projections cannot always be acquired in tomographic reconstructions because of the limited space in the experimental setup, leading to the `missing wedge' situation. In this paper, a recovering `missing wedge' discrete algebraic reconstruction technique algorithm (rmwDART) has been proposed to solve the `missing wedge' problem and improve the quality of the three-dimensional reconstruction without prior knowledge of the material component's number or the material's values. By using oversegmentation, boundary extraction and mathematical morphological operations, `missing wedge' artifact areas can be located. Then, in the iteration process, by updating the located areas and regions, high-quality reconstructions can be obtained from the simulations, and the reconstructed images based on the rmwDART algorithm can be obtained from soft X-ray nano-computed tomography experiments. The results showed that there is the potential for discrete tomography.
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