Multi-wavelength, handheld laser speckle imaging for skin evaluation

Area of Science:

• Biomedical Optics
• Dermatology
• Medical Imaging Technology

Background:

• Non-invasive in vivo human skin evaluation is crucial for diagnosing and monitoring various dermatological conditions.
• Existing imaging technologies may have limitations in resolution, portability, or quantitative analysis.
• Laser speckle imaging (LSI) offers a promising approach for assessing skin microcirculation and tissue properties.

Purpose of the Study:

• To develop and qualify a handheld device for in vivo human skin evaluation using laser speckle imaging technology.
• To assess the device's capability in detecting changes related to skin aging, therapeutic treatments, and disease diagnosis.

Main Methods:

• Development of a handheld laser speckle device prototype with selectable laser wavelengths (400-800 nm).
• Analysis of speckle pattern parameters including speckle contrast, size, modulation, and fractal dimension.
• Evaluation of the device on three distinct skin conditions: aging, methyl nicotinate treatment response, and basal cell carcinoma.

Main Results:

• The laser speckle imaging device yielded reproducible results across all investigated skin conditions.
• Significant changes were observed in skin aging across three distinct age groups.
• The device effectively quantified the effects of methyl nicotinate treatment, comparable to a moorFLPI device.
• Significant differences were detected between normal and basal cell carcinoma-affected skin, despite a limited sample size.

Conclusions:

• The developed handheld laser speckle imaging device demonstrates significant potential for in vivo skin evaluation.
• The technology provides a viable method for objective and quantitative assessment of skin conditions.
• Further applications in dermatology and clinical diagnostics are warranted based on these findings.