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Related Concept Videos

Electron Microscope Tomography and Single-particle Reconstruction01:07

Electron Microscope Tomography and Single-particle Reconstruction

Transmission electron microscopy (TEM) can be used to determine the 3D structure of biological samples with the help of techniques such as electron microscope tomography and single-particle reconstruction. While single-particle reconstruction can examine macromolecules and macromolecular complexes in vitro conditions only, tomography permits the study of cell components or small cells in vivo.
Electron Tomography
Electron tomography can be performed either in TEM or STEM (scanning transmission...

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Updated: May 29, 2026

Imaging Replicative Domains in Ultrastructurally Preserved Chromatin by Electron Tomography
14:56

Imaging Replicative Domains in Ultrastructurally Preserved Chromatin by Electron Tomography

Published on: May 20, 2022

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

L Houben1, M Bar Sadan

  • 1Peter Grünberg Institute and Ernst Ruska-Centre for Microscopy and Spectroscopy with Electrons (ER-C), Research Centre Jülich, Germany. l.houben@fz-juelich.de

Ultramicroscopy
|September 21, 2011
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Summary
This summary is machine-generated.

Accurate image alignment is crucial for high-resolution electron tomography. A novel marker-free method iteratively optimizes tomogram resolution by maximizing sub-volume contrast, achieving competitive accuracy.

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Preparation and Observation of Thick Biological Samples by Scanning Transmission Electron Tomography
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Published on: March 12, 2017

Related Experiment Videos

Last Updated: May 29, 2026

Imaging Replicative Domains in Ultrastructurally Preserved Chromatin by Electron Tomography
14:56

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Preparation and Observation of Thick Biological Samples by Scanning Transmission Electron Tomography
08:04

Preparation and Observation of Thick Biological Samples by Scanning Transmission Electron Tomography

Published on: March 12, 2017

Area of Science:

  • Electron microscopy
  • Tomography
  • Image processing

Background:

  • Accurate image alignment is essential for high-resolution electron tomography.
  • Misalignments in transmission electron microscopy tilt series significantly reduce tomogram fidelity.
  • Achieving ultra-high resolution demands precise alignment of individual images.

Purpose of the Study:

  • To develop a marker-free method for accurate image alignment in electron tomography.
  • To improve tomogram resolution through iterative optimization.
  • To overcome limitations of conventional alignment techniques.

Main Methods:

  • A tomographic-reconstruction based, marker-free approach is proposed.
  • The method employs an iterative optimization strategy.
  • A search algorithm maximizes contrast within tomogram sub-volumes.

Main Results:

  • The marker-free method provides accurate correlation over large tilt angle separations.
  • It ensures consistent image alignment across all object tilt angles.
  • Experimental reconstructions show competitive performance with marker-based methods at lower resolutions.

Conclusions:

  • The proposed marker-free method achieves sub-pixel accuracy for high-resolution electron tomography.
  • It offers a robust alternative to conventional alignment techniques.
  • This approach enhances the fidelity and resolution of tomographic reconstructions.