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The wavelengths of visible light ultimately limit the maximum theoretical resolution of images created by light microscopes. Most light microscopes can only magnify 1000X, and a few can magnify up to 1500X. Electrons, like electromagnetic radiation, can behave like waves, but with wavelengths of 0.005 nm, they produce significantly greater resolution up to 0.05 nm as compared to 500 nm for visible light. An electron microscope (EM) can create a sharp image that is magnified up to 2,000,000X.
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Developing 3D SEM in a broad biological context.

A Kremer1,2,3, S Lippens1,2,3, S Bartunkova1,2,3

  • 1VIB Bio Imaging Core, Gent, VIB, Technologiepark 927, Gent, B-9052, Belgium.

Journal of Microscopy
|January 28, 2015
PubMed
Summary
This summary is machine-generated.

Electron microscopy (EM) now provides detailed 3D cell structures. Advanced techniques like serial block-face scanning EM (SBF-SEM) efficiently capture large volumes of nanoworld data for biological discovery.

Keywords:
Correlative light and electron microscopyfocused ion beam scanning electron microscopysample preparationserial block-face scanning electron microscopy

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Area of Science:

  • Cell Biology
  • Microscopy
  • Nanotechnology

Background:

  • Electron microscopy (EM) revolutionized cell biology by enabling visualization of nanoscale cellular structures.
  • Traditional transmission EM (TEM) faced limitations in acquiring 3D volume data due to section thickness constraints.
  • Previous 3D EM methods like serial section reconstruction and TEM tomography were time-consuming and required specialized expertise.

Purpose of the Study:

  • To highlight advancements in 3D electron microscopy techniques for cellular structure analysis.
  • To showcase the efficiency and resolution of modern 3D EM methods for biological research.
  • To propose future directions integrating functional data with 3D EM datasets.

Main Methods:

  • Exploitation of scanning electron microscopy (SEM) for imaging embedded tissue blocks.
  • Implementation of serial sectioning within the SEM chamber using focused ion beams (FIB) and robotic ultramicrotomes (SBF-SEM).
  • Acquisition of large-volume 3D EM datasets at high resolution.

Main Results:

  • Demonstration of efficient 3D EM data collection for diverse biological specimens.
  • Achieved resolutions sufficient to address significant biological questions regarding cellular ultrastructure.
  • Successful generation of large-scale 3D EM datasets.

Conclusions:

  • Serial block-face scanning EM (SBF-SEM) has overcome previous limitations in 3D EM data acquisition.
  • Modern 3D EM techniques provide efficient and high-resolution insights into cellular architecture.
  • Future research should correlate light microscopy (LM) functional data with 3D EM datasets to link structure and function.