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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,...
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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...
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Transmission electron microscopy (TEM) can be used to determine the 3D structure of biological samples with the help of techniques such as electron microscope tomography and single-particle reconstruction. While single-particle reconstruction can examine macromolecules and macromolecular complexes in vitro conditions only, tomography permits the study of cell components or small cells in vivo.
Electron Tomography
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Total internal reflection fluorescence microscopy or TIRF is an advanced microscopic technique used to visualize fluorophores in samples close to a solid surface with a higher refractive index, such as a glass coverslip. TIRF only allows fluorophores in proximity to the solid surface to be excited. When light from a medium with a lower refractive index (such as air) hits the glass coverslip at a critical angle, the light undergoes total internal reflection stead of passing through the glass.

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Related Experiment Video

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Lensfree On-chip Tomographic Microscopy Employing Multi-angle Illumination and Pixel Super-resolution
08:41

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Published on: August 16, 2012

Highly efficient 3D fluorescence microscopy with a scanning laser optical tomograph.

Raoul-Amadeus Lorbeer1, Marko Heidrich, Christina Lorbeer

  • 1Biomedizinische Optik, Laser Zentrum Hannover e.V., Hollerithallee 8, D-30419 Hannover, Germany. R.Lorbeer@lzh.de

Optics Express
|March 30, 2011
PubMed
Summary
This summary is machine-generated.

Scanning Laser Optical Tomograph (SLOT) improves fluorescence imaging by increasing photon collection efficiency a hundredfold. This minimizes photobleaching and phototoxicity artifacts in biological model organisms.

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Area of Science:

  • Biomedical Imaging
  • Optical Physics
  • Microscopy

Background:

  • Optical Projection Tomography (OPT) enables 3D fluorescence tracking in small biological specimens.
  • Conventional OPT suffers from low photon collection efficiency (<0.1%).
  • Low efficiency leads to radiation dose artifacts like photobleaching and phototoxicity.

Purpose of the Study:

  • To develop an improved tomographic technique for fluorescence imaging.
  • To minimize artifacts associated with low photon collection efficiency in OPT.
  • To enhance the signal-to-noise ratio in 3D fluorescence microscopy.

Main Methods:

  • Construction of a Scanning Laser Optical Tomograph (SLOT).
  • Utilizing SLOT to acquire multimodal 3D data based on absorption and fluorescence.
  • Comparing SLOT performance against conventional fluorescence OPT.

Main Results:

  • SLOT achieved a hundredfold enhancement in photon collection efficiency compared to conventional OPT.
  • Reduced photobleaching and phototoxicity artifacts were observed.
  • Improved 3D fluorescence signal detection in biological samples.

Conclusions:

  • SLOT represents a significant advancement over traditional OPT for fluorescence imaging.
  • The enhanced photon collection efficiency of SLOT allows for higher quality 3D reconstructions.
  • SLOT minimizes radiation dose effects, enabling more robust biological studies.