Publication Date:
2009-12-18
Description:
The ability to determine the structure of matter in three dimensions has profoundly advanced our understanding of nature. Traditionally, the most widely used schemes for three-dimensional (3D) structure determination of an object are implemented by acquiring multiple measurements over various sample orientations, as in the case of crystallography and tomography, or by scanning a series of thin sections through the sample, as in confocal microscopy. Here we present a 3D imaging modality, termed ankylography (derived from the Greek words ankylos meaning 'curved' and graphein meaning 'writing'), which under certain circumstances enables complete 3D structure determination from a single exposure using a monochromatic incident beam. We demonstrate that when the diffraction pattern of a finite object is sampled at a sufficiently fine scale on the Ewald sphere, the 3D structure of the object is in principle determined by the 2D spherical pattern. We confirm the theoretical analysis by performing 3D numerical reconstructions of a sodium silicate glass structure at 2 A resolution, and a single poliovirus at 2-3 nm resolution, from 2D spherical diffraction patterns alone. Using diffraction data from a soft X-ray laser, we also provide a preliminary demonstration that ankylography is experimentally feasible by obtaining a 3D image of a test object from a single 2D diffraction pattern. With further development, this approach of obtaining complete 3D structure information from a single view could find broad applications in the physical and life sciences.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Raines, Kevin S -- Salha, Sara -- Sandberg, Richard L -- Jiang, Huaidong -- Rodriguez, Jose A -- Fahimian, Benjamin P -- Kapteyn, Henry C -- Du, Jincheng -- Miao, Jianwei -- England -- Nature. 2010 Jan 14;463(7278):214-7. doi: 10.1038/nature08705. Epub 2009 Dec 16.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉[1] Department of Physics and Astronomy, [2] California NanoSystems Institute.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20016484" target="_blank"〉PubMed〈/a〉
Keywords:
Algorithms
;
Cryoelectron Microscopy
;
Glass/*chemistry
;
Imaging, Three-Dimensional/*methods
;
Lasers
;
Molecular Conformation
;
Molecular Dynamics Simulation
;
Molecular Imaging/*methods
;
Poliovirus/*chemistry/ultrastructure
;
*Scattering, Radiation
;
Silicates/*chemistry
;
X-Rays
Print ISSN:
0028-0836
Electronic ISSN:
1476-4687
Topics:
Biology
,
Chemistry and Pharmacology
,
Medicine
,
Natural Sciences in General
,
Physics
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