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How many photons are needed to reconstruct random objects in coherent X-ray diffractive imaging?

T Jahn1, R N Wilke1, Y Chushkin1

  • 1University of Göttingen, Institute for X-Ray Physics, Friedrich-Hund-Platz 1, 37077 Göttingen, Germany.

Acta Crystallographica. Section A, Foundations and Advances
|January 3, 2017
PubMed
Summary
This summary is machine-generated.

This study determines the critical X-ray fluence needed for reconstructing diffractive imaging patterns from random objects. It compares information carried by single photons in different diffraction regimes, aligning with experimental findings.

Keywords:
CDIcoherent X-ray diffractive imagingimage reconstructionmaximum likelihoodphase retrieval

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Area of Science:

  • Optics and Photonics
  • Materials Science
  • Information Theory

Background:

  • Coherent X-ray diffractive imaging (CXDI) is a powerful technique for high-resolution imaging.
  • Reconstructing images from diffraction patterns is crucial for understanding nanoscale structures.
  • Previous studies have explored information limits in diffraction imaging.

Purpose of the Study:

  • To investigate the reconstructibility of diffraction patterns from binary random objects using CXDI.
  • To determine the critical X-ray fluence required for successful image reconstruction.
  • To compare information content in different diffraction regimes (near-field and far-field).

Main Methods:

  • Analytical calculations combined with numerical simulations.
  • Investigation of arbitrary contrast values, including absorption and phase shifts.
  • Analysis of diffraction patterns in both optical near-field and far-field regimes.

Main Results:

  • The critical fluence per bitmap pixel was determined for various contrast levels.
  • A comparison of information carried by single photons across different diffraction regimes was established.
  • The study provides a framework for optimizing CXDI experiments.

Conclusions:

  • The reconstructibility of CXDI patterns from random objects is dependent on critical X-ray fluence.
  • Understanding photon information content is vital for efficient diffraction imaging.
  • The findings offer insights into the fundamental limits of diffraction imaging techniques.