The Experts below are selected from a list of 1971 Experts worldwide ranked by ideXlab platform
Alexander Bykov - One of the best experts on this subject based on the ideXlab platform.
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smartphone snapshot mapping of Skin chromophores under triple wavelength laser illumination
Journal of Biomedical Optics, 2017Co-Authors: Janis Spigulis, Ilze Oshina, Anna Berzina, Alexander BykovAbstract:Chromophore distribution maps are useful tools for Skin Malformation severity assessment and for monitoring of Skin recovery after burns, surgeries, and other interactions. The chromophore maps can be obtained by processing several spectral images of Skin, e.g., captured by hyperspectral or multispectral cameras during seconds or even minutes. To avoid motion artifacts and simplify the procedure, a single-snapshot technique for mapping melanin, oxyhemoglobin, and deoxyhemoglobin of in-vivo Skin by a smartphone under simultaneous three-wavelength (448–532–659 nm) laser illumination is proposed and examined. Three monochromatic spectral images related to the illumination wavelengths were extracted from the smartphone camera RGB image data set with respect to crosstalk between the RGB detection bands. Spectral images were further processed accordingly to Beer’s law in a three chromophore approximation. Photon absorption path lengths in Skin at the exploited wavelengths were estimated by means of Monte Carlo simulations. The technique was validated clinically on three kinds of Skin lesions: nevi, hemangiomas, and seborrheic keratosis. Design of the developed add-on laser illumination system, image-processing details, and the results of clinical measurements are presented and discussed.
Hiroshi Nagasaka - One of the best experts on this subject based on the ideXlab platform.
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hamartoma on the hard palate associated with corpus callosum agenesis microphthalmia and Skin Malformation
Journal of Oral and Maxillofacial Surgery, 2007Co-Authors: Junji Takeyama, Hironobu Miyota, Hiroshi NagasakaAbstract:Congenital epulis is a well-known lesion that occurs almost exclusively along the alveolar ridge of the maxilla in newborns. A microscopic finding of the ordinary type is similar to that of granular cell tumor that consists of polygonal cells with abundant granular cytoplasm. The histologic variants have been described as congenital leiomyomatous epulis or leiomyomatous hamartoma. Although the exact etiology still remains unknown, they are generally accepted as hamartomatous lesions. Most hamartomas occur as an isolated abnormality, but some may be seen with other developmental defects such as lobulated tongue or cleft lip and palate. In this article, we report a rare case of palatal hamartoma with corpus callosum agenesis, microphthalmia, and Malformation of the Skin. The pathologic findings and association with other developmental anomalies are unique.
Janis Spigulis - One of the best experts on this subject based on the ideXlab platform.
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smartphone snapshot mapping of Skin chromophores under triple wavelength laser illumination
Journal of Biomedical Optics, 2017Co-Authors: Janis Spigulis, Ilze Oshina, Anna Berzina, Alexander BykovAbstract:Chromophore distribution maps are useful tools for Skin Malformation severity assessment and for monitoring of Skin recovery after burns, surgeries, and other interactions. The chromophore maps can be obtained by processing several spectral images of Skin, e.g., captured by hyperspectral or multispectral cameras during seconds or even minutes. To avoid motion artifacts and simplify the procedure, a single-snapshot technique for mapping melanin, oxyhemoglobin, and deoxyhemoglobin of in-vivo Skin by a smartphone under simultaneous three-wavelength (448–532–659 nm) laser illumination is proposed and examined. Three monochromatic spectral images related to the illumination wavelengths were extracted from the smartphone camera RGB image data set with respect to crosstalk between the RGB detection bands. Spectral images were further processed accordingly to Beer’s law in a three chromophore approximation. Photon absorption path lengths in Skin at the exploited wavelengths were estimated by means of Monte Carlo simulations. The technique was validated clinically on three kinds of Skin lesions: nevi, hemangiomas, and seborrheic keratosis. Design of the developed add-on laser illumination system, image-processing details, and the results of clinical measurements are presented and discussed.
Junji Takeyama - One of the best experts on this subject based on the ideXlab platform.
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hamartoma on the hard palate associated with corpus callosum agenesis microphthalmia and Skin Malformation
Journal of Oral and Maxillofacial Surgery, 2007Co-Authors: Junji Takeyama, Hironobu Miyota, Hiroshi NagasakaAbstract:Congenital epulis is a well-known lesion that occurs almost exclusively along the alveolar ridge of the maxilla in newborns. A microscopic finding of the ordinary type is similar to that of granular cell tumor that consists of polygonal cells with abundant granular cytoplasm. The histologic variants have been described as congenital leiomyomatous epulis or leiomyomatous hamartoma. Although the exact etiology still remains unknown, they are generally accepted as hamartomatous lesions. Most hamartomas occur as an isolated abnormality, but some may be seen with other developmental defects such as lobulated tongue or cleft lip and palate. In this article, we report a rare case of palatal hamartoma with corpus callosum agenesis, microphthalmia, and Malformation of the Skin. The pathologic findings and association with other developmental anomalies are unique.
Ilze Oshina - One of the best experts on this subject based on the ideXlab platform.
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smartphone snapshot mapping of Skin chromophores under triple wavelength laser illumination
Journal of Biomedical Optics, 2017Co-Authors: Janis Spigulis, Ilze Oshina, Anna Berzina, Alexander BykovAbstract:Chromophore distribution maps are useful tools for Skin Malformation severity assessment and for monitoring of Skin recovery after burns, surgeries, and other interactions. The chromophore maps can be obtained by processing several spectral images of Skin, e.g., captured by hyperspectral or multispectral cameras during seconds or even minutes. To avoid motion artifacts and simplify the procedure, a single-snapshot technique for mapping melanin, oxyhemoglobin, and deoxyhemoglobin of in-vivo Skin by a smartphone under simultaneous three-wavelength (448–532–659 nm) laser illumination is proposed and examined. Three monochromatic spectral images related to the illumination wavelengths were extracted from the smartphone camera RGB image data set with respect to crosstalk between the RGB detection bands. Spectral images were further processed accordingly to Beer’s law in a three chromophore approximation. Photon absorption path lengths in Skin at the exploited wavelengths were estimated by means of Monte Carlo simulations. The technique was validated clinically on three kinds of Skin lesions: nevi, hemangiomas, and seborrheic keratosis. Design of the developed add-on laser illumination system, image-processing details, and the results of clinical measurements are presented and discussed.