Application of Analytic Technique Using Green Light Parallel-Polarized Light Images in Various Skin Diseases

Kye, Heesang; Choi, Jae Eun; Seo, Soo Hong; Kye, Young Chul; Ahn, Hyo Hyun

doi:10.5021/ad.2016.28.2.242

Cited by 2 publications

(3 citation statements)

References 8 publications

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“…Previous studies indicated that the CIELAB values from the PPL photographic images can serve as a quantitative indicator of skin surface reflection13. In our previous study, the degree of severity and dryness of skin had significant correlations with CIELAB values from the images taken from PPL photography using green LEDs, particularly those with atopic dermatitis, rosacea, and xerotic dermatitis2.…”

Section: Discussionmentioning

confidence: 63%

“…A preliminary study with various skin diseases indicated that PPL photography images taken with green light emitting diodes (LEDs) might be useful for analyzing specific diseases such as atopic dermatitis, rosacea, and xerotic dermatitis2. Based on our previous study, this study was designed to statistically correlate the CIELAB coordinates with rosacea severity.…”

Section: Introductionmentioning

confidence: 99%

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Rosacea Subtypes Visually and Optically Distinct When Viewed with Parallel-Polarized Imaging Technique

et al. 2017

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BackgroundParallel-polarized light (PPL) photography evaluates skin characteristics by analyzing light reflections from the skin surface.ObjectiveThe aim of this study was to determine the significance of quantitative analysis of PPL images in rosacea patients, and to provide a new objective evaluation method for use in clinical research and practice.MethodsA total of 49 rosacea patients were enrolled. PPL images using green and white light emitting diodes (LEDs) were taken of the lesion and an adjacent normal area. The values from the PPL images were converted to CIELAB coordinates: L* corresponding to the brightness, a* to the red and green intensities, and b* to the yellow and blue intensities.ResultsA standard grading system showed negative correlations with L* (r=−0.67862, p=0.0108) and b* (r=−0.67862, p=0.0108), and a positive correlation with a* (r=0.64194, p=0.0180) with the green LEDs for papulopustular rosacea (PPR) types. The xerosis severity scale showed a positive correlation with L* (r=0.36709, p=0.0276) and a negative correlation with b* (r=−0.33068, p=0.0489) with the white LEDs for erythematotelangiectatic rosacea (ETR) types. In the ETR types, there was brighter lesional and normal skin with white LEDs and a higher score on the xerosis severity scale than the PPR types.ConclusionThis technique using PPL images is applicable to the quantitative and objective assessment of rosacea in clinical settings. In addition, the two main subtypes of ETR and PPR are distinct entities visually and optically.

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Section: Discussionmentioning

confidence: 63%

Section: Introductionmentioning

confidence: 99%

Rosacea Subtypes Visually and Optically Distinct When Viewed with Parallel-Polarized Imaging Technique

et al. 2017

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“…Before and after photographs of the facial skin were analyzed using CIELAB coordinates to confirm changes in brightness. CIELAB values have been applied to evaluate skin brightness quantitatively in other studies 4 . According to the results, LED irradiation improved overall skin brightness, indicated by an increased calculated L* value.…”

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confidence: 99%

Lightening Effect of a Light-Emitting Diode Mask on Facial Skin: A Colorimetric Assessment

et al. 2019

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Application of Analytic Technique Using Green Light Parallel-Polarized Light Images in Various Skin Diseases

Cited by 2 publications

References 8 publications

Rosacea Subtypes Visually and Optically Distinct When Viewed with Parallel-Polarized Imaging Technique

Rosacea Subtypes Visually and Optically Distinct When Viewed with Parallel-Polarized Imaging Technique

Lightening Effect of a Light-Emitting Diode Mask on Facial Skin: A Colorimetric Assessment

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