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Near, far, wherever you are: simulations on the dose efficiency of holographic and ptychographic coherent imaging
Different studies in X-ray microscopy have arrived at conflicting conclusions about the dose efficiency of imaging modes involving the recording of intensity distributions in the near (Fresnel regime) or far (Fraunhofer regime) field downstream of a specimen. A numerical study is presented on the do...
Autores principales: | , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
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International Union of Crystallography
2020
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Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7312132/ https://www.ncbi.nlm.nih.gov/pubmed/32684890 http://dx.doi.org/10.1107/S1600576720005816 |
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author | Du, Ming Gürsoy, Doǧa Jacobsen, Chris |
author_facet | Du, Ming Gürsoy, Doǧa Jacobsen, Chris |
author_sort | Du, Ming |
collection | PubMed |
description | Different studies in X-ray microscopy have arrived at conflicting conclusions about the dose efficiency of imaging modes involving the recording of intensity distributions in the near (Fresnel regime) or far (Fraunhofer regime) field downstream of a specimen. A numerical study is presented on the dose efficiency of near-field holography, near-field ptychography and far-field ptychography, where ptychography involves multiple overlapping finite-sized illumination positions. Unlike what has been reported for coherent diffraction imaging, which involves recording a single far-field diffraction pattern, it is found that all three methods offer similar image quality when using the same fluence on the specimen, with far-field ptychography offering slightly better spatial resolution and a lower mean error. These results support the concept that (if the experiment and image reconstruction are done properly) the sample can be near or far; wherever you are, photon fluence on the specimen sets one limit to spatial resolution. |
format | Online Article Text |
id | pubmed-7312132 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2020 |
publisher | International Union of Crystallography |
record_format | MEDLINE/PubMed |
spelling | pubmed-73121322020-07-16 Near, far, wherever you are: simulations on the dose efficiency of holographic and ptychographic coherent imaging Du, Ming Gürsoy, Doǧa Jacobsen, Chris J Appl Crystallogr Research Papers Different studies in X-ray microscopy have arrived at conflicting conclusions about the dose efficiency of imaging modes involving the recording of intensity distributions in the near (Fresnel regime) or far (Fraunhofer regime) field downstream of a specimen. A numerical study is presented on the dose efficiency of near-field holography, near-field ptychography and far-field ptychography, where ptychography involves multiple overlapping finite-sized illumination positions. Unlike what has been reported for coherent diffraction imaging, which involves recording a single far-field diffraction pattern, it is found that all three methods offer similar image quality when using the same fluence on the specimen, with far-field ptychography offering slightly better spatial resolution and a lower mean error. These results support the concept that (if the experiment and image reconstruction are done properly) the sample can be near or far; wherever you are, photon fluence on the specimen sets one limit to spatial resolution. International Union of Crystallography 2020-05-27 /pmc/articles/PMC7312132/ /pubmed/32684890 http://dx.doi.org/10.1107/S1600576720005816 Text en © Ming Du et al. 2020 http://creativecommons.org/licenses/by/4.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution (CC-BY) Licence, which permits unrestricted use, distribution, and reproduction in any medium, provided the original authors and source are cited.http://creativecommons.org/licenses/by/4.0/ |
spellingShingle | Research Papers Du, Ming Gürsoy, Doǧa Jacobsen, Chris Near, far, wherever you are: simulations on the dose efficiency of holographic and ptychographic coherent imaging |
title | Near, far, wherever you are: simulations on the dose efficiency of holographic and ptychographic coherent imaging
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title_full | Near, far, wherever you are: simulations on the dose efficiency of holographic and ptychographic coherent imaging
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title_fullStr | Near, far, wherever you are: simulations on the dose efficiency of holographic and ptychographic coherent imaging
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title_full_unstemmed | Near, far, wherever you are: simulations on the dose efficiency of holographic and ptychographic coherent imaging
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title_short | Near, far, wherever you are: simulations on the dose efficiency of holographic and ptychographic coherent imaging
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title_sort | near, far, wherever you are: simulations on the dose efficiency of holographic and ptychographic coherent imaging |
topic | Research Papers |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7312132/ https://www.ncbi.nlm.nih.gov/pubmed/32684890 http://dx.doi.org/10.1107/S1600576720005816 |
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