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Lens-free Video Microscopy for the Dynamic and Quantitative Analysis of Adherent Cell Culture
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Label-free full-field Doppler phase microscopy based on optical computation.

Yuwei Liu1, Shupei Yu2, Yuanwei Zhang2

  • 1Department of Electrical and Computer Engineering, New Jersey Institute of Technology, University Heights, Newark, New Jersey, 07105, USA.

Biomedical Optics Express
|January 26, 2023
PubMed
Summary
This summary is machine-generated.

Full-field Doppler phase microscopy (FF-DPM) images subtle cellular motion. This new technology tracks particle movement, revealing differences between free and cell-adhered particles for better cell-environment interaction studies.

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Area of Science:

  • Biophysics
  • Cell Biology
  • Optical Microscopy

Background:

  • Studying cellular and sub-cellular mechanical motion is crucial for understanding cell-environment interactions.
  • Existing imaging technologies lack the necessary resolution, speed, and sensitivity for en face plane motion analysis.
  • There is a need for advanced microscopy techniques to quantitatively measure subtle cellular movements.

Purpose of the Study:

  • To investigate and validate the capabilities of full-field Doppler phase microscopy (FF-DPM) for imaging subtle mechanical motion.
  • To demonstrate FF-DPM's ability to perform depth-resolved imaging and phase quantification for motion tracking.
  • To assess FF-DPM's performance in tracking magnetic particles with varying motion characteristics.

Main Methods:

  • Development and application of a full-field Doppler phase microscopy (FF-DPM) technique.
  • Utilized an innovative optical computation strategy for depth-resolved phase quantification and Doppler measurement.
  • Validated FF-DPM by imaging samples actuated by a piezo transducer (PZT) and magnetic particles under diverse conditions.

Main Results:

  • FF-DPM successfully demonstrated motion tracking capabilities, measuring displacements and velocities of actuated samples.
  • Imaging of magnetic particles revealed distinct motion patterns based on their interaction with cells.
  • Free particles exhibited significantly greater motion magnitude compared to particles adhered to cells.

Conclusions:

  • The developed FF-DPM technology offers a unique capability for quantitative measurement of subtle motion at cellular scales.
  • The innovative optical computation strategy enables precise depth-resolved phase and Doppler measurements.
  • FF-DPM holds significant potential for advancing research in cell biology and biophysics, particularly in studying cell-environment interactions.