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Full range complex ultrahigh sensitive optical microangiography.

Lin An1, Ruikang K Wang

  • 1Department of Bioengineering, University of Washington, Seattle, Washington 98195, USA.

Optics Letters
|March 16, 2011
PubMed
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This study introduces a novel method combining Fourier domain optical coherence tomography (OCT) and optical microangiography (OMAG) for advanced in vivo blood flow imaging. The technique enables full-range complex imaging of microcirculatory tissue beds with high sensitivity.

Area of Science:

  • Biomedical Optics
  • Medical Imaging
  • Microcirculation Research

Background:

  • Optical Coherence Tomography (OCT) provides high-resolution cross-sectional imaging.
  • Optical Microangiography (OMAG) offers sensitive detection of microvascular blood flow.
  • Current methods face limitations in simultaneously achieving full-range complex imaging and high-sensitivity flow detection in microvasculature.

Purpose of the Study:

  • To develop and demonstrate a combined OCT and OMAG system for enhanced in vivo microvascular imaging.
  • To achieve full-range complex imaging of blood flow in microcirculatory tissue beds.
  • To improve the sensitivity and scope of non-invasive blood flow visualization.

Main Methods:

  • Integration of full-range complex Fourier domain OCT with ultrahigh sensitive OMAG.

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  • Utilizing the fast scanning axis for full-range complex imaging and the slow axis for OMAG blood flow imaging.
  • Implementation using a high-speed 1310 nm OCT/OMAG system operating at a 92 kHz line scan rate.

    • Main Results:

    • Successful demonstration of the combined OCT/OMAG system for in vitro flow phantoms.
    • In vivo imaging of blood flow within microcirculatory tissue beds was achieved.
    • The method enables simultaneous full-range complex imaging and sensitive OMAG flow detection.

    Conclusions:

    • The proposed combined OCT/OMAG method offers a powerful tool for advanced microvascular research.
    • This technique facilitates comprehensive in vivo visualization of blood flow dynamics.
    • The system demonstrates potential for improved diagnosis and monitoring of microcirculatory diseases.