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This study introduces distance distribution correction (DDC) to remove false localizations caused by fluorophore blinking in single-molecule localization microscopy (SMLM). DDC accurately reconstructs spatial organization and emitter counts without extra calibration.

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Area of Science:

  • Biophysics
  • Optical Microscopy
  • Nanotechnology

Background:

  • Single-molecule localization microscopy (SMLM) is a powerful super-resolution technique.
  • Fluorophore blinking, the stochastic switching between fluorescent and dark states, leads to artifacts in SMLM.
  • These artifacts, specifically repeat localizations from the same fluorophore, hinder accurate quantitative analysis and interpretation of SMLM data.

Purpose of the Study:

  • To develop a novel method for correcting blinking-induced artifacts in SMLM.
  • To eliminate repeat localizations without requiring additional calibration steps.
  • To improve the accuracy of spatial organization and emitter quantification in SMLM.

Main Methods:

  • A new method, termed distance distribution correction (DDC), was developed.
  • DDC utilizes the natural pairwise distance distribution of fluorophores within the imaging sequence.
  • It identifies and corrects repeat localizations by analyzing distances between localizations separated by times longer than the fluorophore's average survival time.

Main Results:

  • The DDC method effectively eliminates blinking-caused repeat localizations.
  • It enables the determination of a localization set free from blinking artifacts.
  • DDC significantly improves the estimation of true spatial organization and the number of fluorescent emitters.

Conclusions:

  • Distance distribution correction (DDC) provides a robust solution for SMLM artifacts.
  • This method enhances the accuracy of SMLM image reconstruction and quantification.
  • DDC facilitates more reliable biological and nanoscale investigations using SMLM.