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Complex imaging of phase domains by deep neural networks

Journal Article · · IUCrJ

The reconstruction of a single-particle image from the modulus of its Fourier transform, by phase-retrieval methods, has been extensively applied in X-ray structural science. Particularly for strong-phase objects, such as the phase domains found inside crystals by Bragg coherent diffraction imaging (BCDI), conventional iteration methods are time consuming and sensitive to their initial guess because of their iterative nature. Here, a deep-neural-network model is presented which gives a fast and accurate estimate of the complex single-particle image in the form of a universal approximator learned from synthetic data. A way to combine the deep-neural-network model with conventional iterative methods is then presented to refine the accuracy of the reconstructed results from the proposed deep-neural-network model. Improved convergence is also demonstrated with experimental BCDI data.

Sponsoring Organization:
USDOE
Grant/Contract Number:
NONE; SC0012704; AC02-06CH11357
OSTI ID:
1712507
Alternate ID(s):
OSTI ID: 1770409
OSTI ID: 1779029
OSTI ID: 1784505
OSTI ID: 1677665
Journal Information:
IUCrJ, Journal Name: IUCrJ Journal Issue: 1 Vol. 8; ISSN 2052-2525; ISSN IUCRAJ
Publisher:
International Union of Crystallography (IUCr)Copyright Statement
Country of Publication:
United Kingdom
Language:
English

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