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Projective oblique plane structured illumination microscopy.

Bo-Jui Chang1, Douglas Shepherd2, Reto Fiolka3

  • 1Lyda Hill Department of Bioinformatics, University of Texas Southwestern Medical Center, Dallas, TX, 75390, USA.

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|July 3, 2025
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Summary
This summary is machine-generated.

Oblique plane structured illumination microscopy (OPSIM) enables rapid, whole-cell imaging with doubled resolution. This projection technique overcomes limitations of 2D SIM for faster live-cell dynamics studies.

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Area of Science:

  • Biophysics
  • Cell Biology
  • Microscopy

Background:

  • Structured illumination microscopy (SIM) enhances spatial resolution but 2D implementations are limited to thin sample slices.
  • Live-cell imaging with SIM is often restricted in speed and volumetric coverage.
  • Current methods struggle to capture dynamics across an entire cell's volume at high resolution.

Purpose of the Study:

  • To implement oblique plane structured illumination microscopy (OPSIM) in a projection format for rapid, whole-cell imaging.
  • To achieve doubled spatial resolution in live-cell imaging without mechanical scanning.
  • To demonstrate the capability of OPSIM for high-speed imaging of cellular dynamics.

Main Methods:

  • Implementation of oblique plane structured illumination microscopy (OPSIM) in a projection format.
  • Characterization of spatial resolution using fluorescent nanospheres.
  • Imaging of cellular structures like mitochondria and ER in live cells.

Main Results:

  • OPSIM demonstrated the potential for rapid projection imaging with doubled spatial resolution.
  • Whole-cell imaging of mitochondria and ER dynamics was achieved at rates up to 2.7 Hz.
  • This method represents the fastest whole-cell SIM imaging reported to date.

Conclusions:

  • OPSIM in a projection format significantly advances live-cell imaging capabilities.
  • The technique overcomes the depth limitations of conventional 2D SIM.
  • OPSIM offers a powerful new tool for studying rapid cellular processes throughout the entire cell volume.