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Updated: Feb 13, 2026

Phase Contrast and Differential Interference Contrast DIC Microscopy
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Real-time halo correction in phase contrast imaging.

Mikhail E Kandel1, Michael Fanous2, Catherine Best-Popescu2

  • 1Department of Electrical and Computer Engineering, the University of Illinois at Urbana-Champaign, 306 N. Wright Street, Urbana, IL 61801, USA.

Biomedical Optics Express
|March 20, 2018
PubMed
Summary

This study introduces a novel microscopy method to eliminate halo artifacts in phase contrast imaging, enhancing cell detail visualization. The technique enables real-time, accurate quantification of cell growth without manual calibration.

Keywords:
(030.1670) Coherent optical effects(170.3010) Image reconstruction techniques(999.9999) Quantitative phase imaging

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Area of Science:

  • Microscopy
  • Cell Biology
  • Image Processing

Background:

  • Phase contrast microscopy is widely used for label-free, non-destructive cell culture inspection.
  • Halo artifacts, caused by limited spatial coherence, obscure fine cellular details.
  • Existing methods face a trade-off between high-detail and low-detail imaging.

Purpose of the Study:

  • To develop a method that breaks the dichotomy between high-detail and low-detail imaging in phase contrast microscopy.
  • To eliminate halo artifacts without manual interaction or prior system calibration.
  • To enable real-time, quantitative analysis of cellular structures and growth.

Main Methods:

  • A novel technique mixing corrected low-frequency and high-frequency data to remove halo artifacts.
  • Real-time video processing at video rates.
  • Validation using various cell types and tissue samples.

Main Results:

  • Successful elimination of halo artifacts in phase contrast images.
  • Demonstration of real-time halo correction on neuron cultures, revealing neurites.
  • Accurate quantification of cell growth in large populations without thresholds or calibration.

Conclusions:

  • The proposed method effectively removes halo artifacts, improving phase contrast microscopy.
  • Enables real-time, quantitative analysis of cellular dynamics and growth.
  • Offers a significant advancement for routine cell inspection and research.