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Integrated Photoacoustic Ophthalmoscopy and Spectral-domain Optical Coherence Tomography
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Optic axis mapping with catheter-based polarization-sensitive optical coherence tomography.

Martin Villiger1, Boy Braaf1, Norman Lippok1

  • 1Harvard Medical School and Massachusetts General Hospital, Wellman Center for Photomedicine, Boston, MA, USA.

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|June 20, 2019
PubMed
Summary
This summary is machine-generated.

This study introduces a new method to map tissue microstructure using polarization-sensitive optical coherence tomography. It reveals detailed plaque architecture in coronary atherosclerosis, improving diagnostic interpretation.

Keywords:
(110.5405) Polarimetric imaging(170.3010) Image reconstruction techniques(170.3880) Medical and biological imaging(170.4500) Optical coherence tomography

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Area of Science:

  • Biomedical Optics
  • Medical Imaging
  • Materials Science

Background:

  • Birefringence provides intrinsic contrast related to fibrillary tissue microstructure.
  • Current imaging methods lack detailed microstructural and orientation information.
  • Optical coherence tomography (OCT) is a valuable imaging modality.

Purpose of the Study:

  • To develop a reconstruction strategy for quantifying birefringence and optic axis orientation in tissue.
  • To apply this strategy to catheter-based polarization-sensitive OCT (PS-OCT) for intravascular imaging.
  • To enhance the interpretation of atherosclerotic plaque architecture.

Main Methods:

  • Utilized catheter-based PS-OCT for intravascular measurements.
  • Developed a reconstruction strategy incorporating a polarization symmetry constraint.
  • Compensated for wavelength-dependent transmission through system elements and tissue.

Main Results:

  • Successfully recovered both the scalar amount of birefringence and its optic axis orientation.
  • Demonstrated depth-resolved mapping of birefringence in tissue.
  • Applied the technique to intravascular imaging of human coronary atherosclerosis.

Conclusions:

  • The developed reconstruction strategy enables detailed characterization of tissue microstructure.
  • Optic axis orientation provides refined interpretation of plaque architecture in atherosclerosis.
  • Catheter-based PS-OCT with this strategy offers advanced diagnostic capabilities for cardiovascular diseases.