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Related Concept Videos

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Related Experiment Video

Updated: May 12, 2026

Probing Structural and Dynamic Properties of Trafficking Subcellular Nanostructures by Spatiotemporal Fluctuation Spectroscopy
08:17

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Modulated Doppler phase microscopy for dynamic imaging with subcellular resolution.

Rupak Bhakta1, Gizem Celebi Torabfam2, Yuanwei Zhang3

  • 1Department of Electrical and Computer Engineering, New Jersey Institute of Technology, University Heights, Newark, NJ 07102, USA.

Biomedical Optics Express
|May 11, 2026
PubMed
Summary
This summary is machine-generated.

We developed modulated Doppler phase microscopy (M-DPM) for high-resolution cell-nanoparticle interaction imaging. This advanced Doppler imaging technique overcomes limitations of conventional methods, enabling sensitive detection of motion in the en face plane.

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Published on: April 7, 2014

Area of Science:

  • Biomedical Optics
  • Nanotechnology
  • Cellular Imaging

Background:

  • Cell-nanoparticle interactions are vital for nanoparticle-based medicine.
  • Doppler Optical Coherence Tomography (DOCT) is used for dynamic imaging but has resolution limitations for en face motion.
  • Conventional DOCT requires oversampling and struggles with high-resolution, high-sensitivity motion imaging.

Purpose of the Study:

  • To develop a novel imaging technology for high-resolution, high-sensitivity motion imaging of cell-nanoparticle interactions.
  • To overcome the spatial and temporal resolution limitations of conventional DOCT for en face plane imaging.
  • To enable precise detection of nanoparticle motion at the cellular level.

Main Methods:

  • Developed modulated Doppler phase microscopy (M-DPM) technology.
  • Employed an optical computation strategy involving Fourier transform of the interferometric spectrum.
  • Applied temporal modulation and time-domain filtering to 3D data (x-y-t) for phase-resolved Doppler imaging.
  • Utilized M-DPM for en face plane imaging.

Main Results:

  • Achieved high-resolution and high-sensitivity motion imaging in the en face plane.
  • Validated M-DPM performance using samples with global motion.
  • Demonstrated capability for spatially resolved motion detection by imaging magnetic particles interacting with cells.

Conclusions:

  • M-DPM is an effective technology for high-resolution, high-sensitivity Doppler imaging in the en face plane.
  • The developed M-DPM overcomes limitations of conventional DOCT for cellular motion analysis.
  • M-DPM shows promise for studying dynamic cell-nanoparticle interactions in biomedical applications.