Determination of burn depth by polarization-sensitive optical coherence tomography

Area of Science:

• Biomedical Optics
• Dermatology
• Medical Imaging

Background:

• Accurate burn depth assessment is crucial for effective patient treatment.
• Current methods for burn depth evaluation have limitations.
• Noninvasive imaging techniques are needed to improve diagnostic capabilities.

Purpose of the Study:

• To evaluate the potential of polarization-sensitive optical coherence tomography (PS-OCT) for quantitative burn depth assessment.
• To investigate the correlation between PS-OCT measurements and thermal injury severity.
• To explore PS-OCT as a noninvasive tool for guiding burn treatment decisions.

Main Methods:

• Thermal burns of varying depths were induced in rat skin using a preheated brass rod.
• Polarization-sensitive optical coherence tomography (PS-OCT) was employed to image the induced burns.
• Depth-resolved changes in light polarization state and birefringence reduction were analyzed using Stokes vectors.

Main Results:

• PS-OCT successfully imaged collagen denaturation caused by thermal injury.
• A consistent trend was observed between the reduction in phase retardation rate and burn exposure time.
• The rate of phase retardation (deg/microm) correlated with burn severity.

Conclusions:

• PS-OCT is a noninvasive technique capable of quantitatively assessing burn depth.
• The observed reduction in birefringence provides a measurable indicator of thermal injury.
• PS-OCT holds significant potential for improving the clinical management of burn patients.