0000000000285925

AUTHOR

Aleksejs Zavorins

showing 3 related works from this author

Skin Erythema Assessment by an RGB Imaging Device: a Clinical Study

2015

In this study, skin erythema assessment of 90 rosacea patients was estimated by a simple, low-cost RGB imaging device. A new erythema index assessment algorithm is proposed and clinically validated. Comparison with dermatologist’s visual assessment shows high correlation.

Skin erythemamedicine.medical_specialtyintegumentary systemErythemabusiness.industrymedicine.diseaseDermatologyClinical studyOpticsRosaceaVisual assessmentRGB color modelMedicinemedicine.symptomskin and connective tissue diseasesbusinessFrontiers in Optics 2015
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Comparison of single-spot technique and RGB imaging for erythema index estimation

2016

A commercially available point measurement device, the Mexameter(®), and an experimental RGB imaging prototype device were used for erythema index estimation of 50 rosacea patients by analysing the level of skin redness on the forehead, both cheeks and both sides of a nose. Results are compared with Clinician's Erythema Assessment (CEA) values given by two dermatologists. The Mexameter uses 568 nm and 660 nm LEDs and a photodetector for estimation of erythema index, while the used prototype device acquired RGB images at 460 nm, 530 nm and 665 nm LED illumination. Several erythema index estimation algorithms were compared to determine which one gives the best contrast between increased eryth…

Diagnostic Imagingmedicine.medical_specialtyErythemaPhysiologyBiomedical EngineeringBiophysicsColor01 natural sciencesImaging data010309 optics030207 dermatology & venereal diseases03 medical and health sciences0302 clinical medicineMeasurement devicePhysiology (medical)0103 physical sciencesmedicineHumansLed illuminationbusiness.industrymedicine.diseaseDermatologymedicine.anatomical_structureSemiconductorsErythemaRosaceaForeheadRGB color modelFemalemedicine.symptomNormal skinbusinessAlgorithmsPhysiological Measurement
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Comparison of a near-infrared reflectance spectroscopy system and skin conductance measurements for in vivo estimation of skin hydration: a clinical …

2017

Diffuse reflectance spectroscopy system was developed for estimation of skin hydration in the near-infrared spectral range of 900-1700 nm. Experimental setup consisted of a near-infrared spectrometer, Y-type fiber optics probe with 1 detection and 6 illumination fibers, halogen-tungsten light source and a PC. By analyzing diffuse reflectance spectrum, a parameter representing skin hydration by performing baseline correction and calculating the area under the 1450 nm water absorption maximum is proposed. A clinical study was performed acquiring data of skin hydration of 39 patients' forearm skin. Results of the developed system are compared to results obtained by a commercial device based on…

lcsh:Applied optics. PhotonicsspectroscopyskinOptical fiberlcsh:Medical technologyAcoustics and UltrasonicsDiffuse reflectance infrared fourier transformwaterBiomedical EngineeringAbsorption (skin)near-infraredlaw.inventionBiomaterialsOpticsIn vivolawSpectroscopySpectrometerintegumentary systembusiness.industryChemistryNear-infrared spectroscopylcsh:TA1501-1820Atomic and Molecular Physics and Opticslcsh:R855-855.5Diffuse reflectanceDiffuse reflectionbusinessabsorptionhydrationJournal of Biomedical Photonics & Engineering
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