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Related Concept Videos

A Protocol for Real-time 3D Single Particle Tracking10:16

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Related Experiment Video

Updated: Jan 20, 2026

A Protocol for Real-time 3D Single Particle Tracking
10:16

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Nanoscale Resolution 3D Snapshot Particle Tracking by Multifocal Microscopy.

Xiaolei Wang1, Hannah Yi2, Itay Gdor1

  • 1James Franck Institute , University of Chicago , 929 East 57th Street , Chicago , Illinois 60637 , United States.

Nano Letters
|September 7, 2019
PubMed
Summary

Multifocal microscopy (MFM) enables rapid, simultaneous 3D tracking of fluorescent particles with nanoscale precision. This breakthrough enhances understanding of dynamic biological systems at the cellular level.

Keywords:
3D trackingaccuracy and precisionlive cell imagingmultifocal microscope

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Area of Science:

  • Biophysics
  • Optical Microscopy
  • Cell Biology

Background:

  • Accurate, precise, and rapid 3D particle tracking is crucial for understanding living systems.
  • Existing methods face challenges in achieving simultaneous tracking of multiple particles with nanoscale resolution.

Purpose of the Study:

  • To develop and validate a multifocal microscopy (MFM) technique for simultaneous 3D tracking of fluorescent particles.
  • To achieve nanoscale accuracy and precision in tracking over biologically relevant spatial scales.

Main Methods:

  • Development of a multifocal microscopy (MFM) system for snapshot imaging.
  • Implementation of an associated image processing approach for simultaneous 3D particle localization.
  • Validation using fluorescent beads with known trajectories, immobilized in gels, and in live cells.

Main Results:

  • Achieved axial accuracy of 19 nm and precision of 4 nm over several micrometers of imaging depth.
  • Demonstrated Brownian dynamics of diffusing beads and validated against confocal microscopy.
  • Successfully obtained 3D trajectories of insulin granules in MIN6 cells, showing compatibility with complex biological systems.

Conclusions:

  • Multifocal microscopy (MFM) enables rapid, video-rate, simultaneous 3D tracking of numerous particles with nanoscale accuracy.
  • The MFM approach is applicable to a wide range of systems, including live cells, advancing biological insights.