Refinement procedure for the image alignment in high-resolution electron tomography

L. Houben, M. Bar Sadan

Research output: Contribution to journalArticlepeer-review

39 Scopus citations

Abstract

High-resolution electron tomography from a tilt series of transmission electron microscopy images requires an accurate image alignment procedure in order to maximise the resolution of the tomogram. This is the case in particular for ultra-high resolution where even very small misalignments between individual images can dramatically reduce the fidelity of the resultant reconstruction. A tomographic-reconstruction based and marker-free method is proposed, which uses an iterative optimisation of the tomogram resolution. The method utilises a search algorithm that maximises the contrast in tomogram sub-volumes. Unlike conventional cross-correlation analysis it provides the required correlation over a large tilt angle separation and guarantees a consistent alignment of images for the full range of object tilt angles. An assessment based on experimental reconstructions shows that the marker-free procedure is competitive to the reference of marker-based procedures at lower resolution and yields sub-pixel accuracy even for simulated high-resolution data.

Original languageEnglish
Pages (from-to)1512-1520
Number of pages9
JournalUltramicroscopy
Volume111
Issue number9-10
DOIs
StatePublished - 1 Aug 2011
Externally publishedYes

Keywords

  • Electron tomography
  • High resolution tomography
  • Marker free alignment

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Instrumentation

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