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Quantitative imaging and microanalysis with a scanning soft x-ray microscope.

C Jacobsen, J M Kenney, J Kirz

    Physics in Medicine and Biology
    |April 1, 1987
    PubMed
    Summary
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    A new soft x-ray microscope uses synchrotron radiation and a Fresnel zone plate to create high-resolution images. This advanced imaging technique maps specimen absorptivity with remarkable elemental sensitivity.

    Area of Science:

    • Physics
    • Microscopy
    • Biotechnology

    Background:

    • Soft x-ray microscopy offers unique capabilities for biological and materials science imaging.
    • Advancements in focusing optics and radiation sources are crucial for achieving higher resolution and sensitivity.

    Purpose of the Study:

    • To develop and demonstrate a scanning soft x-ray microscope utilizing synchrotron radiation.
    • To achieve submicron resolution and high elemental sensitivity for quantitative imaging.

    Main Methods:

    • Utilized synchrotron radiation focused by a Fresnel zone plate to generate a submicron beamspot.
    • Employed transmitted x-ray detection to create quantitative maps of specimen absorptivity.
    • Applied the microscope to image whole wet cells and map calcium in bone sections.

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    Main Results:

    • Achieved a spatial resolution of 300 nm.
    • Demonstrated an elemental sensitivity of 2 micrograms cm-2.
    • Successfully imaged hydrated biological specimens and mapped elemental distribution.

    Conclusions:

    • The developed scanning soft x-ray microscope is a powerful tool for high-resolution quantitative imaging.
    • The instrument enables novel applications in cell biology and materials science, particularly for elemental mapping.