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A simple method to estimate the average localization precision of a single-molecule localization microscopy

Ulrike Endesfelder1, Sebastian Malkusch, Franziska Fricke

  • 1Institute of Physical and Theoretical Chemistry, Johann Wolfgang Goethe University Frankfurt am Main, Frankfurt am Main, Germany, endesfelder@chemie.uni-frankfurt.de.

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|February 14, 2014
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Summary

We developed a simple method to estimate localization precision in single-molecule localization microscopy (SMLM). This routine provides reliable precision values crucial for accurate SMLM data analysis and structural studies.

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Area of Science:

  • Microscopy and Imaging Technologies
  • Biophysics
  • Computational Biology

Background:

  • Localization precision is critical for single-molecule localization microscopy (SMLM), impacting spatial resolution.
  • Precision depends on imaging conditions and algorithmic registration.
  • Accurate precision estimation is vital for quantitative SMLM analysis.

Purpose of the Study:

  • To introduce a straightforward routine for estimating average experimental localization precision in SMLM.
  • To demonstrate the general applicability of the method across various SMLM datasets.
  • To provide a reliable measure of localization precision (σSMLM) for subsequent analyses.

Main Methods:

  • Nearest neighbor analysis applied to SMLM data.
  • Validation using diverse experimental and simulated targets.
  • Adaptable for both 2D and 3D SMLM datasets.

Main Results:

  • A novel and simple routine for estimating SMLM localization precision was successfully developed.
  • The method yields reliable σSMLM values.
  • The approach is broadly applicable to different SMLM experimental and simulated data.

Conclusions:

  • The proposed nearest neighbor analysis offers a robust and generalizable method for determining SMLM localization precision.
  • Accurate σSMLM values are essential for meaningful SMLM data interpretation, visualization, and quantitative studies like cluster or colocalization analysis.