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Highly Resolved Intravital Striped-illumination Microscopy of Germinal Centers

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Published on: April 9, 2014

Long-wavelength oblique back-illumination microscopy for deep in vivo imaging.

Ye-Chan Cho¹, Jin Hee Hong¹, Sungsam Kang¹

¹Department of Physics, Korea University, Seoul 02855, Republic of Korea.

Biomedical Optics Express

|January 14, 2026

Summary

This summary is machine-generated.

Oblique back-illumination microscopy (OBM) now uses longer 1650 nm wavelengths to overcome scattering and achieve deeper in vivo brain imaging in mice. This label-free technique enhances visualization of biological systems for advanced research.

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Area of Science:

Biomedical optics
Microscopy
In vivo imaging

Background:

Oblique back-illumination microscopy (OBM) is a label-free imaging method.
OBM generates high-contrast images by detecting forward-scattered light in reflection mode.
Tissue scattering limits OBM's imaging depth in biological tissues.

Purpose of the Study:

To extend the imaging depth of OBM.
To mitigate scattering effects in biological tissues.
To develop a long-wavelength OBM system for deeper in vivo imaging.

Main Methods:

Implemented a novel OBM system operating at 1650 nm wavelength.
Compared the 1650 nm OBM system with an 800 nm system for in vivo mouse brain imaging.
Evaluated imaging depth and contrast in biological tissues.

Main Results:

The 1650 nm OBM system achieved significantly deeper in vivo imaging of the mouse brain compared to the 800 nm system.
Longer wavelengths effectively mitigated scattering effects, enabling deeper penetration.
High-contrast pseudo-transmission images were obtained at extended depths.

Conclusions:

Long-wavelength OBM (1650 nm) significantly enhances imaging depth in scattering biological tissues.
This advancement facilitates deeper in vivo investigations of the mouse brain.
The developed OBM system offers potential for detailed studies in living biological systems and their pathophysiology.