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Related Concept Videos

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.
Immunofluorescence Microscopy01:12

Immunofluorescence Microscopy

A fluorescence microscope uses fluorescent chromophores called fluorochromes, which can absorb energy from a light source and then emit this energy as visible light. Fluorochromes include naturally fluorescent substances (such as chlorophylls) and fluorescent stains that are added to the specimen to create contrast. Dyes such as Texas red and FITC are examples of fluorochromes. Other examples include the nucleic acid dyes 4’,6’-diamidino-2-phenylindole (DAPI), and acridine orange.
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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...
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,...

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Updated: Jun 7, 2026

A Rapid Method for Multispectral Fluorescence Imaging of Frozen Tissue Sections
07:50

A Rapid Method for Multispectral Fluorescence Imaging of Frozen Tissue Sections

Published on: March 30, 2020

Medical diagnostic system based on simultaneous multispectral fluorescence imaging.

S Andersson-Engels, J Johansson, S Svanberg

    Applied Optics
    |October 22, 2010
    PubMed
    Summary
    This summary is machine-generated.

    This study introduces a multicolor fluorescence imaging system for medical diagnostics. The system uses a pulsed laser and gated detection to capture spectral images, aiding in tumor detection with minimal tissue impact.

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    Simultaneous Multicolor Imaging of Biological Structures with Fluorescence Photoactivation Localization Microscopy

    Published on: December 9, 2013

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    Last Updated: Jun 7, 2026

    A Rapid Method for Multispectral Fluorescence Imaging of Frozen Tissue Sections
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    Published on: March 30, 2020

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    04:47

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    Published on: June 6, 2025

    Simultaneous Multicolor Imaging of Biological Structures with Fluorescence Photoactivation Localization Microscopy
    12:51

    Simultaneous Multicolor Imaging of Biological Structures with Fluorescence Photoactivation Localization Microscopy

    Published on: December 9, 2013

    Area of Science:

    • Medical Diagnostics
    • Biomedical Imaging
    • Optical Spectroscopy

    Background:

    • Multicolor fluorescence imaging offers potential for enhanced medical diagnostics.
    • Minimizing excitation energy is crucial to prevent side effects on biological tissues.
    • Effective suppression of ambient background light is necessary for sensitive imaging.

    Purpose of the Study:

    • To describe a novel multicolor fluorescence imaging system for medical diagnostics.
    • To enable low-resolution spectroscopy imaging by simultaneously recording multiple wavelength bands.
    • To demonstrate the system's capability in visualizing fluorescence from tumors in vivo.

    Main Methods:

    • Simultaneous recording of four fluorescence images in different wavelength bands.
    • Construction of an arithmetic function image via pixel-to-pixel calculation.
    • Utilization of a pulsed laser excitation source and gated detection for background light suppression.
    • Application of a sensitive detector to minimize excitation energy.

    Main Results:

    • The system enables low-resolution spectroscopy imaging.
    • False-color coding is used to present the constructed spectral images on a monitor.
    • High suppression of ambient background light was achieved.
    • Fluorescence images of rat tumors (hind leg and brain) injected with Photofrin were successfully obtained.

    Conclusions:

    • The described multicolor fluorescence imaging system is effective for medical diagnostics.
    • The system's design considerations enhance detector sensitivity and image quality.
    • The use of pulsed laser and gated detection significantly improves signal-to-noise ratio.
    • The system demonstrates potential for in vivo tumor imaging applications.