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Related Concept Videos

Protein Dynamics in Living Cells01:19

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Different fluorescence-based techniques are used to study the protein dynamics in living cells. These techniques include FRAP, FRET, and PET.
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Updated: Sep 27, 2025

A High-throughput Cell Microarray Platform for Correlative Analysis of Cell Differentiation and Traction Forces
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Cellular analysis using label-free parallel array microscopy with Fourier ptychography.

Devin L Wakefield1,2, Richard Graham3,2, Kevin Wong3,2

  • 1Amgen Inc, South San Francisco, CA 94080, USA.

Biomedical Optics Express
|April 13, 2022
PubMed
Summary
This summary is machine-generated.

Quantitative phase imaging (QPI) offers superior label-free cell counting accuracy compared to digital phase contrast (DPC). Fourier ptychographic microscopy (FPM) enabled automated cell segmentation and analysis, improving results over conventional methods.

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Area of Science:

  • Biomedical optics
  • Cell biology
  • Microscopy techniques

Background:

  • Quantitative phase imaging (QPI) provides label-free, non-invasive monitoring of cell populations.
  • Conventional label-free techniques like digital phase contrast (DPC) have limitations in sample characterization and cell counting.
  • Fourier ptychographic microscopy (FPM) is an advanced QPI technique enabling high-resolution imaging.

Purpose of the Study:

  • To compare the cell counting accuracy of QPI using an FPM system against DPC.
  • To demonstrate the advantages of QPI for automated and reliable cell counting.
  • To evaluate the performance of FPM in resolving fine cellular details.

Main Methods:

  • Utilized a Fourier ptychographic microscopy (FPM) system for multi-well, parallel quantitative phase imaging.
  • Developed and applied a QPI-specific cell segmentation method for automated cell counting.
  • Compared cell counting results from FPM-QPI and DPC against manually counted fluorescence ground-truth data.
  • Studied three distinct cell types to assess imaging and counting performance.

Main Results:

  • FPM-based QPI demonstrated improved accuracy in cell counting compared to DPC.
  • The FPM system showed enhanced ability to resolve fine cellular details and thin cells.
  • Automated segmentation using QPI yielded more accurate cell counts relative to fluorescence ground-truth.
  • Imaging artifacts in the FPM system presented some limitations.

Conclusions:

  • Quantitative phase imaging, particularly with FPM, offers superior performance for label-free cell counting over DPC.
  • Automated cell segmentation methods enhance the reliability and accuracy of QPI-based cell population analysis.
  • FPM-based QPI is a promising technique for advanced cell characterization and monitoring in biological research.