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Related Concept Videos

Super-resolution Fluorescence Microscopy01:37

Super-resolution Fluorescence Microscopy

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Super-resolution fluorescence microscopy (SRFM) provides a better resolution than conventional fluorescence microscopy by reducing the point spread function (PSF). PSF is the light intensity distribution from a point that causes it to appear blurred. Due to PSF, each fluorescing point appears bigger than its actual size, and it is the PSF interference of nearby fluorophores that causes the blurred image. Various approaches to achieving higher resolution through SRFM have recently been...
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Related Experiment Video

Updated: Aug 11, 2025

Excitation-Scanning Hyperspectral Imaging Microscopy to Efficiently Discriminate Fluorescence Signals
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Super-multiplexing excitation spectral microscopy with multiple fluorescence bands.

Kun Chen1,2,3, Wan Li1, Ke Xu1

  • 1Department of Chemistry & California Institute for Quantitative Biosciences, University of California, Berkeley, Berkeley, CA 94720, USA.

Biomedical Optics Express
|February 3, 2023
PubMed
Summary

This study introduces an advanced fluorescence microscopy technique enabling simultaneous imaging of up to ten targets by utilizing multiple fluorescence bands. This method significantly improves the ability to visualize complex cellular structures with minimal spectral overlap.

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Last Updated: Aug 11, 2025

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Area of Science:

  • Biophysics
  • Cell Biology
  • Microscopy

Background:

  • Fluorescence microscopy is crucial for biological studies but limited by broad fluorescence spectra.
  • Distinguishing numerous subcellular structures is challenging due to spectral overlap of fluorophores.

Purpose of the Study:

  • To extend excitation spectral microscopy for simultaneous imaging of more targets.
  • To develop a cost-effective and easy-to-implement microscopy system for enhanced multiplexing.

Main Methods:

  • Utilized multiple fluorescence bands and a 24-wavelength excitation scheme via an acousto-optic tunable filter (AOTF).
  • Acquired full-frame excitation-spectral images by scanning excitation wavelengths.
  • Validated the method using numerical simulations and cell imaging experiments.

Main Results:

  • Achieved simultaneous imaging of up to ten fluorophores with minimal crosstalk (∼0.5%).
  • Demonstrated unambiguous identification of up to eight intracellular structures in cell imaging.
  • Showcased reduced spectral crosstalk for fluorophores with significant overlap.

Conclusions:

  • The developed microscopy system offers superior spectral information and multiplexing capability.
  • This technique enables visualization of complex cellular components with more colors and lower crosstalk.
  • Presents an accessible and effective solution for advanced fluorescence imaging in biological research.