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Digital processing methods for structural analysis of an electron micrograph.

K Kanaya, N Baba, M Shino

    Scanning Electron Microscopy
    |January 1, 1982
    PubMed
    Summary
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    This study introduces a digital processing method using a scanning densitometer and microcomputer to clarify periodic structures in crystals and biological specimens. The technique enhances electron micrograph analysis for materials like gold, carbon, and hydroxyapatite, improving structural insights.

    Area of Science:

    • Materials Science
    • Biophysics
    • Crystallography

    Background:

    • Periodic structures in crystals and biological specimens often present challenges for clear imaging.
    • High-resolution electron microscopy generates complex data requiring advanced processing.
    • Understanding the structure of materials like hydroxyapatite and viral capsids is crucial.

    Purpose of the Study:

    • To develop and demonstrate a digital processing method for enhancing images of periodic structures.
    • To apply this method to analyze crystal structures and biological specimens.
    • To improve the clarity and detail of electron micrographs for structural analysis.

    Main Methods:

    • Utilizing a scanning densitometer integrated with a microcomputer for digital image processing.

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  • Implementing local lattice averaging to clarify periodic features.
  • Employing selected diffraction spots and spectra from electron micrographs for analysis.

    • Main Results:

    • Successfully applied digital processing to analyze the structure of evaporated gold, graphitized carbon, and hydroxyapatite in human tooth enamel.
    • Confirmed and clarified microbody crystalloids in enzymes and icosahedral capsids in viruses.
    • Demonstrated significant improvements in the structural analysis of electron micrographs.

    Conclusions:

    • Digital processing with a scanning densitometer offers a powerful system for describing and analyzing periodic structures.
    • The method, particularly local lattice averaging, is effective for both crystalline and paracrystalline arrays.
    • This approach significantly enhances the structural analysis capabilities for electron microscopy data.