Mueller microscopy of full thickness skin models combined with image segmentation

Hee Ryung Lee; Christian Lotz; Florian Kai Groeber-Becker; Sofia Dembski; Enric Garcia-Caurel; Razvigor Ossikovski; Tatiana Novikova

doi:10.1117/12.2526626

22 July 2019 Mueller microscopy of full thickness skin models combined with image segmentation

Hee Ryung Lee, Christian Lotz, Florian Kai Groeber-Becker, Sofia Dembski, Enric Garcia-Caurel, Razvigor Ossikovski, Tatiana Novikova

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Proceedings Volume 11076, Advances in Microscopic Imaging II; 1107615 (2019) https://doi.org/10.1117/12.2526626
Event: European Conferences on Biomedical Optics, 2019, Munich, Germany

Abstract

Mueller transmission microscopy has been used for both theoretical and experimental studies of anisotropic scattering biological tissue. In our prior study, the linear dependence of retardance and quadratic dependence of depolarization on thickness was demonstrated for a dermal layer of skin model. During the primary analysis of polarimetric images of histological cuts both epidermal and dermal layers were delineated manually in order to calculate the spatially averaged values of retardance and depolarization parameters. Consequently, these average values contained the contribution of outliers (noise, not correctly identified pixels, etc.) which produces large standard deviation and biased mean values of the parameters mentioned above. For preventing the errors, the normalized maps of optical properties were calculated pixel-wise taking into account local optical density (e. i. logarithm of M11 element of Mueller matrix at each image pixel) to compensate varying tissue thickness across the cut area. Furthermore, the DBSCAN (Density-based spatial clustering of applications with noise) algorithm was applied for segmentation of microscopic images using the normalized values of retardance, depolarization, and intensity. From the results of image segmentation, we could discriminate the regions of dermal and epidermal layers in Muller microscopic images of skin cuts more accurately and obtain more reliable values of tissue’s optical properties.

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Hee Ryung Lee, Christian Lotz, Florian Kai Groeber-Becker, Sofia Dembski, Enric Garcia-Caurel, Razvigor Ossikovski, and Tatiana Novikova "Mueller microscopy of full thickness skin models combined with image segmentation", Proc. SPIE 11076, Advances in Microscopic Imaging II, 1107615 (22 July 2019); https://doi.org/10.1117/12.2526626

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KEYWORDS

Image segmentation

Skin

Tissue optics

Tissues

Microscopes

Microscopy

Optical properties

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