Direct phasing in femtosecond nanocrystallography. II. Phase retrieval

Joe P J Chen, John Spence, Rick P. Millane

Research output: Contribution to journalArticlepeer-review

11 Scopus citations


X-ray free-electron laser diffraction patterns from protein nanocrystals provide information on the diffracted amplitudes between the Bragg reflections, offering the possibility of direct phase retrieval without the use of ancillary experimental diffraction data [Spence et al. (2011). Opt. Express, 19, 2866-2873]. The estimated continuous transform is highly noisy however [Chen et al. (2014). Acta Cryst. A70, 143-153]. This second of a series of two papers describes a data-selection strategy to ameliorate the effects of the high noise levels and the subsequent use of iterative phase-retrieval algorithms to reconstruct the electron density. Simulation results show that employing such a strategy increases the noise levels that can be tolerated.

Original languageEnglish (US)
Pages (from-to)154-161
Number of pages8
JournalActa Crystallographica Section A: Foundations and Advances
Issue number2
StatePublished - Mar 2014


  • Direct phasing
  • Femtosecond crystallography
  • Iterative transform algorithms
  • Nanocrystals
  • Shape transform
  • X-ray free-electron lasers

ASJC Scopus subject areas

  • Structural Biology
  • Biochemistry
  • General Materials Science
  • Condensed Matter Physics
  • Physical and Theoretical Chemistry
  • Inorganic Chemistry


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