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Related Concept Videos

Confocal Fluorescence Microscopy01:16

Confocal Fluorescence Microscopy

Confocal microscopy is an advanced microscopic technique. The prime advantage of the confocal microscope over other microscopy techniques is its ability to block the out-of-focus light from the illuminated samples using pinholes. It is widely used with fluorescence optics to obtain high-resolution, sharp contrast images. Unlike optical microscopes, confocal microscopes use a focused beam of light laser to scan the entire sample surface at different z-planes. These microscopes are, therefore,...
Super-resolution Fluorescence Microscopy01:37

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 developed.

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Related Experiment Video

Updated: May 13, 2026

Video-rate Scanning Confocal Microscopy and Microendoscopy
14:10

Video-rate Scanning Confocal Microscopy and Microendoscopy

Published on: October 20, 2011

Endoscopic focal modulation microscopy.

J Ahn1, H Yoo2, D-G Gweon1

  • 1Nano Opto-Mechatronics Laboratory, Department of Mechanical Engineering, KAIST, Daejeon, South Korea.

Journal of Microscopy
|March 16, 2013
PubMed
Summary
This summary is machine-generated.

We developed endoscopic focal modulation microscopy (FMM) for high-contrast, minimally invasive deep tissue imaging. This novel technique offers superior contrast compared to endoscopic confocal microscopy (CM).

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Area of Science:

  • Biomedical optics
  • Microscopy
  • Minimally invasive imaging

Background:

  • Deep tissue imaging is crucial for biological and medical research.
  • Existing endoscopic microscopy techniques face challenges with contrast and optical sectioning in deep tissues.
  • High-contrast imaging methods are needed for minimally invasive in-vivo studies.

Purpose of the Study:

  • To introduce and evaluate endoscopic focal modulation microscopy (FMM) for deep tissue imaging.
  • To compare the performance of FMM with endoscopic confocal microscopy (CM).
  • To demonstrate the capability of FMM for high-contrast imaging in biological samples.

Main Methods:

  • Development of a needle-like endoscopic probe utilizing gradient-index (GRIN) lenses.
  • Implementation of focal modulation microscopy (FMM) for deep tissue visualization.
  • Imaging of a tissue-like phantom with fluorescent micro-beads and rat kidney tubules using the endoscopic probe.
  • Comparison of FMM imaging results with those obtained from endoscopic confocal microscopy (CM).

Main Results:

  • Endoscopic FMM successfully imaged deep tissue samples with high contrast.
  • FMM effectively rejected background signals from out-of-focus planes.
  • Enhanced image contrast and optical sectioning ability were achieved with FMM.
  • The combination of GRIN endoscopic probe and FMM provided better contrast than endoscopic CM.

Conclusions:

  • Endoscopic FMM is a promising technique for minimally invasive deep tissue imaging.
  • FMM offers superior contrast and optical sectioning compared to endoscopic CM.
  • The developed endoscopic FMM system enables high-quality imaging in challenging biological samples.