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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.
Protein Dynamics in Living Cells01:19

Protein Dynamics in Living Cells

Different fluorescence-based techniques are used to study the protein dynamics in living cells. These techniques include FRAP, FRET, and PET.
Fluorescent recovery after photobleaching (FRAP) is a fluorescent-protein-based detection technique used to quantify protein movement rates within the cell. This method exposes a small portion of the cell to an intense laser beam. The laser beam causes permanent photobleaching of the fluorophore-tagged proteins in the exposed region. As the bleached...

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Super-Resolution Imaging and Shared Management: A Protocol for Confocal Microscopy with Multiplex Detection
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In vivo Three-Dimensional Superresolution Fluorescence Tracking using a Double-Helix Point Spread Function.

Matthew D Lew1, Michael A Thompson, Majid Badieirostami

  • 1Department of Electrical Engineering, Stanford University, Stanford, CA 94305.

Proceedings of Spie--The International Society for Optical Engineering
|June 22, 2010
PubMed
Summary
This summary is machine-generated.

A novel double-helix point spread function (DH-PSF) enhances 3D super-resolution microscopy. This method offers superior and consistent localization precision for imaging delicate biological structures.

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Area of Science:

  • Microscopy
  • Biophysics
  • Optical Imaging

Background:

  • Standard widefield fluorescence microscopy point spread functions (PSFs) are inadequate for 3D super-resolution imaging.
  • Accurate localization of emitters is crucial for achieving high-resolution 3D images.

Purpose of the Study:

  • To characterize the localization precision of a novel double-helix point spread function (DH-PSF) for 3D super-resolution microscopy.
  • To compare the DH-PSF's performance against standard PSF methods.

Main Methods:

  • Design and implementation of a DH-PSF where emitter axial position dictates lobe rotation, creating a 3D double-helix.
  • Theoretical comparison using the Cramer-Rao bound to assess localization precision as a function of axial position.
  • Experimental validation by imaging quantum dots in glycerol and live cells.

Main Results:

  • The DH-PSF demonstrates higher and more uniform localization precision compared to standard PSFs across a 2 micrometer depth of field.
  • The DH-PSF method shows applicability for imaging weak emitters in biological systems.
  • Successful tracking of quantum dot movement in various environments.

Conclusions:

  • The DH-PSF is a promising technique for improving 3D super-resolution imaging.
  • This method offers enhanced precision and uniformity, particularly beneficial for imaging faint biological targets.
  • The DH-PSF's performance is competitive with other advanced 3D super-resolution techniques.