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Title: Parallel ptychographic reconstruction

Abstract

Ptychography is an imaging method whereby a coherent beam is scanned across an object, and an image is obtained by iterative phasing of the set of diffraction patterns. It is able to be used to image extended objects at a resolution limited by scattering strength of the object and detector geometry, rather than at an optics-imposed limit. As technical advances allow larger fields to be imaged, computational challenges arise for reconstructing the correspondingly larger data volumes, yet at the same time there is also a need to deliver reconstructed images immediately so that one can evaluate the next steps to take in an experiment. Here we present a parallel method for real-time ptychographic phase retrieval. It uses a hybrid parallel strategy to divide the computation between multiple graphics processing units (GPUs) and then employs novel techniques to merge sub-datasets into a single complex phase and amplitude image. Results are shown on a simulated specimen and a real dataset from an X-ray experiment conducted at a synchrotron light source.

Authors:
 [1];  [2];  [3];  [4];  [1];  [5]
  1. Argonne National Lab. (ANL), Argonne, IL (United States). Mathematics and Computer Science Div.
  2. Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source
  3. Argonne National Lab. (ANL), Argonne, IL (United States). Mathematics and Computer Science Div.
  4. Northwestern Univ., Evanston, IL (United States). Applied Physics.
  5. Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source; Northwestern Univ., Evanston, IL (United States). Applied Physics
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Advanced Scientific Computing Research (ASCR) (SC-21)
OSTI Identifier:
1201761
Alternate Identifier(s):
OSTI ID: 1392648
Grant/Contract Number:  
AC02-06CH11357; FC02-06ER25777
Resource Type:
Accepted Manuscript
Journal Name:
Optics Express
Additional Journal Information:
Journal Volume: 22; Journal Issue: 26; Journal ID: ISSN 1094-4087
Publisher:
Optical Society of America (OSA)
Country of Publication:
United States
Language:
English
Subject:
97 MATHEMATICS AND COMPUTING; Image reconstruction techniques; Parallel processing; Phase retrieval; X-ray imaging

Citation Formats

Nashed, Youssef S. G., Vine, David J., Peterka, Tom, Deng, Junjing, Ross, Rob, and Jacobsen, Chris. Parallel ptychographic reconstruction. United States: N. p., 2014. Web. doi:10.1364/OE.22.032082.
Nashed, Youssef S. G., Vine, David J., Peterka, Tom, Deng, Junjing, Ross, Rob, & Jacobsen, Chris. Parallel ptychographic reconstruction. United States. doi:10.1364/OE.22.032082.
Nashed, Youssef S. G., Vine, David J., Peterka, Tom, Deng, Junjing, Ross, Rob, and Jacobsen, Chris. Fri . "Parallel ptychographic reconstruction". United States. doi:10.1364/OE.22.032082. https://www.osti.gov/servlets/purl/1201761.
@article{osti_1201761,
title = {Parallel ptychographic reconstruction},
author = {Nashed, Youssef S. G. and Vine, David J. and Peterka, Tom and Deng, Junjing and Ross, Rob and Jacobsen, Chris},
abstractNote = {Ptychography is an imaging method whereby a coherent beam is scanned across an object, and an image is obtained by iterative phasing of the set of diffraction patterns. It is able to be used to image extended objects at a resolution limited by scattering strength of the object and detector geometry, rather than at an optics-imposed limit. As technical advances allow larger fields to be imaged, computational challenges arise for reconstructing the correspondingly larger data volumes, yet at the same time there is also a need to deliver reconstructed images immediately so that one can evaluate the next steps to take in an experiment. Here we present a parallel method for real-time ptychographic phase retrieval. It uses a hybrid parallel strategy to divide the computation between multiple graphics processing units (GPUs) and then employs novel techniques to merge sub-datasets into a single complex phase and amplitude image. Results are shown on a simulated specimen and a real dataset from an X-ray experiment conducted at a synchrotron light source.},
doi = {10.1364/OE.22.032082},
journal = {Optics Express},
number = 26,
volume = 22,
place = {United States},
year = {2014},
month = {12}
}

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Cited by: 17 works
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