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Updated: Oct 30, 2025

A Protocol for Real-time 3D Single Particle Tracking
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Multiplexed PSF Engineering for Three-Dimensional Multicolor Particle Tracking.

Nadav Opatovski, Yael Shalev Ezra, Lucien E Weiss

    Nano Letters
    |July 2, 2021
    PubMed
    Summary
    This summary is machine-generated.

    We developed a new method for 3D multicolor particle tracking using multiplexed point-spread-function engineering. This technique improves photon efficiency and speed for imaging multiple emitters simultaneously.

    Keywords:
    PSF engineeringmicroscopymulticolor imagingsingle-particle trackingsuper-resolution

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    Area of Science:

    • Optical Imaging
    • Biophysics
    • Microscopy

    Background:

    • Three-dimensional (3D) spatiotemporal tracking of multicolor microscopic particles is crucial for biological research but faces limitations.
    • Existing methods often involve trade-offs in photon efficiency, field of view, speed, and spectral specificity.

    Purpose of the Study:

    • To introduce a novel technique for photon-efficient, 3D multicolor particle tracking over a large field of view.
    • To overcome the limitations of current optical imaging approaches for microscopic particle analysis.

    Main Methods:

    • Multiplexed point-spread-function (PSF) engineering was employed.
    • Microscope emission paths were chromatically split into different channels.
    • PSFs were engineered for each channel and then recombined onto a single camera region.

    Main Results:

    • The technique enables simultaneous tracking of five distinct emitter types in vitro.
    • Demonstrated successful colocalization of DNA loci within live yeast cells using this method.
    • Achieved high photon efficiency and speed in 3D multicolor particle tracking.

    Conclusions:

    • Multiplexed PSF engineering offers a powerful solution for advanced 3D multicolor particle tracking.
    • This method significantly enhances capabilities for studying molecular dynamics and cellular processes.
    • The technique provides a versatile tool for various applications in biophysics and live-cell imaging.