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Three-dimensional Optical-resolution Photoacoustic Microscopy
08:31

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Published on: May 3, 2011

Random-access optical-resolution photoacoustic microscopy using a digital micromirror device.

Jinyang Liang1, Yong Zhou, Amy W Winkler

  • 1Optical Imaging Laboratory, Department of Biomedical Engineering, Washington University in St. Louis, St. Louis, Missouri 63130, USA.

Optics Letters
|August 2, 2013
PubMed
Summary
This summary is machine-generated.

We created a new random-access photoacoustic microscopy system for faster imaging. This optical-resolution photoacoustic microscopy (OR-PAM) allows real-time monitoring of specific blood flow in capillaries.

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Area of Science:

  • Biomedical optics
  • Microscopy
  • Photoacoustics

Background:

  • Traditional photoacoustic microscopy (PAM) systems often require scanning the entire field of view, limiting imaging speed.
  • Efficiently imaging specific regions of interest (ROIs) is crucial for dynamic biological processes.

Purpose of the Study:

  • To develop a random-access optical-resolution photoacoustic microscopy (OR-PAM) system.
  • To enable rapid, targeted imaging of arbitrarily shaped regions within a defined area.
  • To enhance in vivo imaging speed for dynamic processes like blood flow.

Main Methods:

  • Utilized a digital micromirror device (DMD) for random-access scanning in OR-PAM.
  • Acquired a global structural image to identify regions of interest (ROIs).
  • Implemented targeted scanning of selected ROIs with high lateral resolution (3.6 μm).

Main Results:

  • Demonstrated random-access imaging of static samples (carbon fiber cross, red blood cells) at rates up to 4 kHz.
  • Successfully monitored in vivo blood flow in real-time within selected mouse ear capillaries.
  • Achieved up to a 9.2-fold increase in frame rate by imaging only the capillary of interest.

Conclusions:

  • The developed random-access OR-PAM system enables rapid, targeted imaging.
  • This technology significantly improves imaging speed for in vivo dynamic processes.
  • The system offers a powerful tool for high-speed, selective visualization in biological research.