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Updated: Jan 10, 2026

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High-fidelity microsecond-scale cellular imaging using two-axis compressed streak imaging fluorescence microscopy.

Mark A Keppler1,2, Sean P O'Connor1, Zachary A Steelman3

  • 1SAIC, 4141 Petroleum Dr, JBSA Fort Sam Houston, 78234, Texas, USA.

Arxiv
|November 24, 2025
PubMed
Summary
This summary is machine-generated.

Two-axis compressed streak imaging (TACSI) enhances video fidelity for cellular microscopy by reducing streak compression and motion blur. This breakthrough enables visualization of rapid biological processes previously undetectable with conventional methods.

Keywords:
cellular biologycompressed sensingcompression ratioelectrophysiologyfluorescence microscopyhigh-speed imagingstreak photography

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Area of Science:

  • Computational imaging
  • Optical microscopy
  • Biophysics

Background:

  • Compressed streak imaging (CSI) achieves ultra-high frame rates but struggles with subtle intensity fluctuations in slow-moving objects.
  • High streak compression and motion blur limit CSI's application in cellular fluorescence microscopy.
  • Existing CSI technologies face challenges in accurately capturing dynamic biological events.

Purpose of the Study:

  • To develop an advanced CSI method, two-axis compressed streak imaging (TACSI), for improved video fidelity.
  • To overcome the limitations of conventional CSI in detecting subtle intensity variations and motion blur.
  • To expand the utility of CSI for high-speed biological imaging.

Main Methods:

  • Introduced a second scanning axis in CSI to create a two-axis compressed streak imaging (TACSI) system.
  • TACSI shuttles a conjugate image of the object relative to the coded aperture.
  • Developed an analytical model for TACSI compression ratio, validated with simulations and empirical data.

Main Results:

  • TACSI significantly improves reconstructed video fidelity compared to conventional CSI.
  • The method reduces streak compression ratio and mitigates coded aperture motion blur.
  • Demonstrated TACSI's capability to measure rapid cell membrane potential variations.

Conclusions:

  • TACSI overcomes key limitations of current CSI technologies, enhancing its applicability in microscopy.
  • The developed method enables high-speed visualization of cellular dynamics on microsecond timescales.
  • TACSI has broad implications for studying fast biological phenomena like action potentials and enzymatic reactions.