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Super-resolution Fluorescence Microscopy

Super-resolution Fluorescence Microscopy

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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Updated: Sep 18, 2025

Highly Resolved Intravital Striped-illumination Microscopy of Germinal Centers

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Super-resolution upgrade for deep tissue imaging featuring simple implementation.

Patrick Byers^1,2, Thomas Kellerer¹, Miaomiao Li^3,4

¹Multiphoton Imaging Lab, Munich University of Applied Sciences, Munich, Germany.

Nature Communications

|June 25, 2025

Summary

This summary is machine-generated.

This study presents a low-cost method to enhance deep tissue imaging resolution using standard two-photon microscopes. The inexpensive optical upgrades enable super-resolution imaging of sub-cellular structures in biological samples.

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Area of Science:

Biomedical Optics
Microscopy
Cell Biology

Background:

Deep tissue imaging is limited by optical aberrations and scattering in dense biological samples.
Existing super-resolution microscopy techniques for deep tissue imaging are often complex and expensive.
Achieving high-contrast imaging near the optical resolution limit remains a significant challenge.

Purpose of the Study:

To develop a cost-effective method for enhancing the resolution of two-photon laser-scanning microscopes for deep tissue imaging.
To demonstrate a simple modification applicable to existing multi-photon microscopy systems.
To extend the penetration depth of super-resolved imaging in scattering biological tissues.

Main Methods:

Modification of standard two-photon laser-scanning microscopes with inexpensive optical components: a cylindrical lens, a field rotator, and a sCMOS camera.
Implementation of patterned line-scanning and image reconstruction techniques.
Utilizing the sCMOS camera's lightsheet shutter mode to enhance penetration depth in scattering tissues.

Main Results:

Achieved up to twofold resolution enhancement in deep tissue imaging.
Successfully imaged sub-cellular structures in Pinus radiata, mouse heart muscle, and zebrafish.
Demonstrated extended penetration depth for super-resolved imaging in highly scattering tissues.
Validated the method's flexibility with various thick samples, fluorescent markers, and objective lenses.

Conclusions:

A cost-effective and simple modification can transform standard two-photon microscopes into super-resolution systems for deep tissue imaging.
The developed method significantly enhances imaging resolution and penetration depth in scattering biological samples.
This approach offers a practical solution for high-resolution deep tissue imaging without requiring highly complex or expensive instrumentation.