Human skin image analysis using coherent focused beam scattering

Dmitry A. Zimnyakov; Valery V. Tuchin; Sergei R. Utz M.D.; Alexey A. Mishin

doi:10.1117/12.200873

1 February 1995 Human skin image analysis using coherent focused beam scattering

Dmitry A. Zimnyakov, Valery V. Tuchin, Sergei R. Utz M.D., Alexey A. Mishin

Proceedings Volume 2329, Optical and Imaging Techniques in Biomedicine; (1995) https://doi.org/10.1117/12.200873
Event: International Symposium on Biomedical Optics Europe '94, 1994, Lille, France

Abstract

The analysis of statistical and correlation properties of speckle patterns formed during different skin tissue scanning by the sharply focused probing laser beam has been carried out. The influences of the biotissues' structural features on the speckle patterns formation under Gaussian beam illumination have been investigated. The relationships between the structural characteristics of the sample under study, Rayleigh range of the probing beam and normalized statistical moments of the speckle intensity (contrast and asymmetry coefficient) are discussed for the different scatterer models. A phenomenological model of speckle pattern formation for the large-scale scatterers allows us to explain the dependence of speckle contrast and the coefficient of asymmetry on the generalized structure parameters and illumination conditions for the samples under study. The experimental investigations of the human skin structure features have been carried out using two types of the tissue samples by means of coherent scanning microscopy (CSM). Firstly, D-SQUAME discs (CuDerm Corporation, Texas, USA) have been used for the evaluation of skin dryness level. Secondly, the samples under study were the thin layers of normal and psoriatic epidermis (skin strippings). The dependencies of contrast and coefficient of asymmetry on the beam defocusing parameter and 2D correlation functions of speckle pattern intensity have been analyzed for different zones on the biotissue's surface. Particularly, promising results in skin dryness studies (using D-SQUAME discs) have been obtained. Our results and conventional 5-pattern kit scale are in good agreement. So, the presented method is accurate and objective and may be useful in novel cosmetic research and development.

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Dmitry A. Zimnyakov, Valery V. Tuchin, Sergei R. Utz M.D., and Alexey A. Mishin "Human skin image analysis using coherent focused beam scattering", Proc. SPIE 2329, Optical and Imaging Techniques in Biomedicine, (1 February 1995); https://doi.org/10.1117/12.200873

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KEYWORDS

Speckle

Skin

Statistical analysis

Speckle pattern

Tissues

Scattering

Laser scattering

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