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@ARTICLE{Dora:599279,
      author       = {Dora, Johannes and Möddel, Martin and Flenner, Silja and
                      Schroer, Christian and Knopp, Tobias and Hagemann, Johannes},
      title        = {{A}rtifact-suppressing reconstruction of strongly
                      interacting objects in {X}-ray near-field holography without
                      a spatial support constraint},
      journal      = {Optics express},
      volume       = {32},
      number       = {7},
      issn         = {1094-4087},
      address      = {Washington, DC},
      publisher    = {Optica},
      reportid     = {PUBDB-2023-07286},
      pages        = {10801},
      year         = {2024},
      note         = {Helmholtz Association ZT-I-PF-4-027 (SmartPhase)},
      abstract     = {The phase problem is a well known ill-posed reconstruction
                      problem of coherent lens-less microscopic imaging, where
                      only the squared magnitude of a complex wavefront is
                      measured by a detector while the phase information of the
                      wave field is lost. To retrieve the lost information, common
                      algorithms rely either on multiple data acquisitions under
                      varying measurement conditions or on the application of
                      strong constraints such as a spatial support. In X-ray
                      near-field holography, however, these methods are rendered
                      impractical in the setting of time sensitive in situ and
                      operando measurements. In this paper, we will forego the
                      spatial support constraint and propose a projected gradient
                      descent (PGD) based reconstruction scheme in combination
                      with proper preprocessing and regularization that
                      significantly reduces artifacts for refractive
                      reconstructions from only a single acquired hologram without
                      a spatial support constraint. We demonstrate the feasibility
                      and robustness of our approach on different data sets
                      obtained at the nano imaging endstation of P05 at PETRA III
                      (DESY, Hamburg) operated by Helmholtz-Zentrum Hereon.},
      cin          = {FS-PETRA / FS-PS / Hereon},
      ddc          = {530},
      cid          = {I:(DE-H253)FS-PETRA-20140814 / I:(DE-H253)FS-PS-20131107 /
                      I:(DE-H253)Hereon-20210428},
      pnm          = {6G3 - PETRA III (DESY) (POF4-6G3) / HIDSS-0002 - DASHH:
                      Data Science in Hamburg - Helmholtz Graduate School for the
                      Structure of Matter $(2019_IVF-HIDSS-0002)$ / SFB 986 Z02 -
                      Multiskalige Analyse von Strukturen und Prozessen mit
                      Synchrotronstrahlung und Neutronen (Z02) (221133217) / DFG
                      project G:(GEPRIS)192346071 - SFB 986: Maßgeschneiderte
                      Multiskalige Materialsysteme - M3 (192346071) / 632 -
                      Materials – Quantum, Complex and Functional Materials
                      (POF4-632)},
      pid          = {G:(DE-HGF)POF4-6G3 / $G:(DE-HGF)2019_IVF-HIDSS-0002$ /
                      G:(GEPRIS)221133217 / G:(GEPRIS)192346071 /
                      G:(DE-HGF)POF4-632},
      experiment   = {EXP:(DE-H253)P-P05-20150101},
      typ          = {PUB:(DE-HGF)16},
      pubmed       = {38570945},
      UT           = {WOS:001207066900004},
      doi          = {10.1364/OE.514641},
      url          = {https://bib-pubdb1.desy.de/record/599279},
}