Birefringence measurements in human skin using polarization-sensitive optical coherence tomography

Area of Science:

• Biomedical Optics
• Medical Imaging
• Dermatology

Background:

• Optical coherence tomography (OCT) provides high-resolution, real-time cross-sectional tissue imaging.
• Polarization sensitivity (PS) enhances OCT contrast by analyzing light backscattered from tissue.
• PS-OCT offers complementary information to intensity-based OCT imaging.

Purpose of the Study:

• To present in vivo polarization-sensitive optical coherence tomography (PS-OCT) imaging of human skin.
• To demonstrate the technique's ability to visualize and quantify skin birefringence.
• To investigate variations in skin birefringence across different anatomical locations.

Main Methods:

• In vivo imaging of human skin using polarization-sensitive optical coherence tomography (PS-OCT).
• Quantification of birefringent properties, specifically double-pass phase retardation rates.
• Analysis of Stokes parameters of backscattered light to reduce speckle noise.

Main Results:

• Demonstrated visualization and quantification of human skin birefringence in vivo.
• Identified variations in normal skin birefringence across the dorsal hand, temple, and lower back.
• Reported mean double-pass phase retardation rates for different anatomical regions.
• Showcased PS-OCT imaging of skin sites post-wound healing and repair.

Conclusions:

• PS-OCT is a valuable tool for in vivo visualization and quantification of skin birefringence.
• Birefringence variations in skin correlate with anatomical location and collagen distribution.
• PS-OCT can provide insights into tissue structure and changes during wound healing.