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Related Concept Videos

Three-Dimensional Microscopy in Microbiology01:28

Three-Dimensional Microscopy in Microbiology

Three-dimensional imaging techniques are essential in cell biology, allowing researchers to visualize intricate cellular structures with high resolution. Two prominent methods, Differential Interference Contrast Microscopy (DIC) and Confocal Scanning Laser Microscopy (CSLM), provide distinct advantages for imaging live and thick specimens, respectively.Differential Interference Contrast MicroscopyDIC microscopy enhances contrast in transparent, unstained samples by converting phase...
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.
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,...
Imaging Biological Samples with Optical Microscopy01:18

Imaging Biological Samples with Optical Microscopy

Optical microscopy uses optic principles to provide detailed images of samples. Antonie van Leeuwenhoek designed the first compound optical microscope in the 17th century to visualize blood cells, bacteria, and yeast cells. In 1830, Joseph Jackson Lister created an essentially modern light microscope. The 20th century saw the development of microscopes with enhanced magnification and resolution.
In optical microscopy, the specimen to be viewed is placed on a glass slide and clipped on the stage...

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Related Experiment Video

Updated: Jun 1, 2026

Three-dimensional Optical-resolution Photoacoustic Microscopy
08:31

Three-dimensional Optical-resolution Photoacoustic Microscopy

Published on: May 3, 2011

Three-dimensional optical-resolution photoacoustic microscopy.

Song Hu1, Konstantin Maslov, Lihong V Wang

  • 1Optical Imaging Laboratory, Department of Biomedical Engineering, Washington University, St. Louis, USA.

Journal of Visualized Experiments : Jove
|May 19, 2011
PubMed
Summary
This summary is machine-generated.

Optical-resolution photoacoustic microscopy (OR-PAM) offers high-sensitivity optical absorption imaging, complementing existing microscopy techniques. This novel method provides background-free detection and broad biomedical applications for in vivo imaging.

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Integrated Photoacoustic Ophthalmoscopy and Spectral-domain Optical Coherence Tomography
11:21

Integrated Photoacoustic Ophthalmoscopy and Spectral-domain Optical Coherence Tomography

Published on: January 15, 2013

Area of Science:

  • Biomedical optics
  • Photoacoustic imaging
  • Microscopy technologies

Background:

  • Optical microscopy is crucial for cellular and organelle studies.
  • Existing methods like fluorescence microscopy and OCT excel at scattering and fluorescence contrast but not absorption.
  • Optical absorption contrast in tissues holds vital physiological and pathological information.

Purpose of the Study:

  • Introduce optical-resolution photoacoustic microscopy (OR-PAM) as a novel biomedical imaging technique.
  • Highlight OR-PAM's ability to detect optical absorption contrast with high sensitivity.
  • Demonstrate OR-PAM's utility in complementing existing optical microscopy methods.

Main Methods:

  • OR-PAM focuses optical irradiation to the diffraction limit for cellular/subcellular resolution.
  • OR-PAM detects optical absorption contrast by converting it into acoustic waves.
  • OR-PAM can be combined with fluorescence microscopy or OCT for comprehensive optical property analysis.

Main Results:

  • OR-PAM achieves extraordinary sensitivity (100%) for optical absorption contrast.
  • Acoustic detection in OR-PAM mitigates optical scattering effects and provides background-free imaging.
  • OR-PAM eliminates spectral crosstalk common in fluorescence microscopy.

Conclusions:

  • OR-PAM is a valuable addition to biomedical imaging, offering unique optical absorption contrast.
  • The technique has demonstrated diverse applications in neurology, ophthalmology, vascular biology, and dermatology.
  • OR-PAM provides background-free, high-resolution imaging of biological tissues.