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Updated: Nov 8, 2025

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Super-resolution fluorescence microscopy by line-scanning with an unmodified two-photon microscope.

Christian Pilger1, Jakub Pospíšil1,2, Marcel Müller1

  • 1Biomolecular Photonics, Department of Physics, University of Bielefeld, Bielefeld, Germany.

Philosophical Transactions. Series A, Mathematical, Physical, and Engineering Sciences
|April 26, 2021
PubMed
Summary

Super-resolution microscopy enhances biological insights by improving spatial resolution. This study demonstrates achieving super-resolution in two-photon microscopy without complex optical setups, using readily available software.

Keywords:
SIMlaser scanning fluorescence microscopymulti-photon fluorescence excitationstructured illumination microscopysuper-resolution optical microscopy

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Area of Science:

  • Biomedical research
  • Optical microscopy
  • Super-resolution imaging

Background:

  • Super-resolution microscopy offers enhanced spatial resolution for biological insights.
  • Two-photon fluorescence microscopy enables deep tissue imaging but often requires complex setups.
  • Existing super-resolution techniques can be limited by specialized optical configurations.

Purpose of the Study:

  • To demonstrate optical super-resolution and contrast enhancement in two-photon laser scanning microscopy.
  • To show that super-resolution can be achieved without significant hardware modifications.
  • To provide an accessible method for advanced imaging in biological research.

Main Methods:

  • Generation of striped-illumination patterns in two-photon laser scanning microscopy.
  • Utilizing open-source image reconstruction software for super-resolution.
  • Modifying scanning software with a custom macro and electro-optic modulator for pattern acquisition.
  • Acquisition of patterns on an sCMOS camera.

Main Results:

  • Achieved optical super-resolution and contrast enhancement in two-photon microscopy.
  • Demonstrated the effectiveness of the method on a commercial two-photon laser scanning microscope.
  • Validated resolution improvement using established image evaluation procedures.
  • Showcased the compatibility with open-source reconstruction software.

Conclusions:

  • Striped-illumination patterns can be readily exploited for super-resolution in two-photon microscopy.
  • This approach requires minimal modifications to commercial microscopes, making super-resolution more accessible.
  • The method enhances imaging capabilities for deep tissue studies in biomedical research.