Retrieval of the physiological state of human skin from UV–Vis reflectance spectra – A feasibility study

Nielsen, Kristian Pagh; Zhao, Lu; Ryzhikov, G.; Biryulina, M.; Sommersten, E. R.; Stamnes, Jakob J.; Stamnes, Knut; Moan, Johan Emelian

doi:10.1016/j.jphotobiol.2008.06.010

Cited by 29 publications

(21 citation statements)

References 35 publications

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“…On the basis of established absorption and transmission spectra for known skin chromophores and mathematical modeling of skin reflectance [17,18], the set of recorded images is used to retrieve maps of physiology properties and morphometric parameters of the lesion, which are assumed to be different for benign and malignant tissue. The retrieval is based on (i) a biooptical model that relates physiological properties of skin tissue to its inherent optical properties [18], (ii) a radiative transfer model that for a given set of inherent optical properties computes the light backscattered from the skin for a given wavelength and direction of illumination, and (iii) a nonlinear inversion algorithm that compares the computed backscattered light at various wavelengths and directions with that of the recorded image set [17].…”

Section: Optical Transfer Diagnosismentioning

confidence: 99%

“…The retrieval is based on (i) a biooptical model that relates physiological properties of skin tissue to its inherent optical properties [18], (ii) a radiative transfer model that for a given set of inherent optical properties computes the light backscattered from the skin for a given wavelength and direction of illumination, and (iii) a nonlinear inversion algorithm that compares the computed backscattered light at various wavelengths and directions with that of the recorded image set [17].…”

Section: Optical Transfer Diagnosismentioning

confidence: 99%

“…An estimate of the misfit between the measured and simulated reflected light for a given pixel (after compression) is given by (see Eq. 9(A.7) in [17]):…”

Section: Appendix Amentioning

confidence: 99%

See 2 more Smart Citations

Optical detection and monitoring of pigmented skin lesions

Stamnes

Ryzhikov

Biryulina

et al. 2017

Biomed. Opt. Express

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A method is presented for discriminating between malignant and benign pigmented skin lesions based on multispectral and multi-angle images. It is discussed how to retrieve maps of physiology properties and morphometric parameters from recorded images using a biooptical model, radiative transfer calculations, and nonlinear inversion, and how to employ automated zooming to extract lesion and surrounding masks. Training and validation of a classification scheme for separation between benign and malignant tissue yielded sensitivity/specificity ranging from 97%/97% for application to a small dataset comprised of lesions not used for training and validation to 99%/93% for application to a larger dataset.

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Section: Optical Transfer Diagnosismentioning

confidence: 99%

Section: Optical Transfer Diagnosismentioning

confidence: 99%

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Optical detection and monitoring of pigmented skin lesions

Stamnes

Ryzhikov

Biryulina

et al. 2017

Biomed. Opt. Express

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“…Today there are different approaches to modelling UV light transport in skin tissue. Several groups have adopted the discrete ordinates method [126,146], or the diffusion approximation [147], to solve the RTE. Diffusion provides a simple analytical expression, but works best in the near infrared region when scattering dominates over absorption.…”

Section: Mathematical Models Of Light Penetration In Skinmentioning

confidence: 99%

Solar radiation and human health

Moan

Juzeniene

2010

Journal of Photochemistry and Photobiology B: Biology

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The Sun has played a major role in the development of life on Earth. In Western culture, people are warned against Sun exposure because of its adverse effects: erythema, photoimmunosuppression, photoageing, photocarcinogenesis, cataracts and photokeratitis. However, Sun exposure is also beneficial, since moderate doses give beneficial physiological effects: vitamin D synthesis, reduction of blood pressure and mental health. Shortage of Sun exposure may be even more dangerous to human health than excessive exposure. Avoiding Sun exposure leads to vitamin D deficiency which is associated not only with rickets and osteomalacia, but also with increased risk of cardiovascular disease, multiple sclerosis, rheumatoid arthritis, diabetes, influenza, many types of cancer and adverse pregnancy outcomes. Solar radiation induces nitric oxide release in tissue and immediate pigment darkening which certainly play important roles, although these are still unknown. Action spectra relevant for health are described. We will also review what is known about spectral and intensity variations of terrestrial solar radiation as well as its penetration through the atmosphere and into human skin and tissue.

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“…, where g is the anisotropy factor and is constant in each layer, as described in [8]. The enlightment we want to model presents cylindrical symmetry, so we get rid of the second spherical angle, to keep the angle with respect to the skin plane.…”

Section: Simplifying Assumptionsmentioning

confidence: 99%

A rainbow inverse problem

2010

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Abstract. We consider the radiative transfer equation (RTE) with reflection in a three-dimensional domain, infinite in two dimensions, and prove an existence result. Then, we study the inverse problem of retrieving the optical parameters from boundary measurements, with help of existing results by Choulli and Stefanov. This theoretical analysis is the framework of an attempt to model the color of the skin. For this purpose, a code has been developed to solve the RTE and to study the sensitivity of the measurements made by biophysicists with respect to the physiological parameters responsible for the optical properties of this complex, multi-layered material. Résumé. Onétudie l'équation du transfert radiatif (ETR) dans un domaine tridimensionnel infinidans deux directions, et on prouve un résultat d'existence. On s'intéresse ensuiteà la reconstruction des paramètres optiquesà partir de mesures faites au bord, en s'appuyant sur des résultats de Choulli et Stefanov. Cette analyse sert de cadre théoriqueà un travail de modélisation de la couleur de la peau. Dans cette perspective, un codeàété développé pour résoudre l'ETR etétudier la sensibilité des mesures effectuées par les biophysiciens par rapport aux paramètres physiologiques tenus pour responsables des propriétés optiques de ce complexe matériau multicouche.

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Retrieval of the physiological state of human skin from UV–Vis reflectance spectra – A feasibility study

Cited by 29 publications

References 35 publications

Optical detection and monitoring of pigmented skin lesions

Optical detection and monitoring of pigmented skin lesions

Solar radiation and human health

A rainbow inverse problem

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