Body Anatomical UV Protection Predicted by Shade Structures: a Modeling Study.

TitreBody Anatomical UV Protection Predicted by Shade Structures: a Modeling Study.
Publication TypeJournal Article
Year of Publication2018
AuthorsReligi, A, Backes, C, Moccozet, L, Vuilleumier, L, Vernez, D, Bulliard, J-L
JournalPhotochemistry and photobiology
Date Published11/2018
Mots-clésArm/radiation effects, Computer Simulation, Head/radiation effects, Humans, Leg/radiation effects, Male, Manikins, Models, Radiation, Radiation Dosage, Radiometry/statistics & numerical data, Scattering, Skin/radiation effects, Statistical, Sunlight/adverse effects, Sunscreening Agents/analysis, Torso/radiation effects, Ultraviolet Rays/adverse effects

Shade is an important means of protection against harmful effects of sun ultraviolet (UV) exposure, but not all shades are identically protective. UV rays scattered by the atmosphere and surroundings can reach the skin indirectly. In order to evaluate the relative contribution of the direct, diffuse and reflected radiation in UV protection provided by different sizes of shade structure, we used SimUVEx v2, a numeric tool based on 3D graphic techniques and ambient ground UV irradiance. The relative UV exposure reduction was expressed by the predictive protection factor (PPF). Shade structures were found to predominantly reduce exposure from direct radiation (from 97.1% to 99.9% for the upper body areas such as the head and the neck), with greater protection from larger shade structures and structures closer above the subject. Legs were the least protected anatomical zone from any shade structure above the subject with PPF ranging from 18.5% to 68.1%. Throughout the day, except for lower solar zenith angles (SZA), small and high shade structures provide the lowest protection (between 20% and 50%), while small and low shade structure show PPF between 35% and 65% and large and high shade structures reach PPF higher than 60%. This article is protected by copyright. All rights reserved.

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First publication date (online)




Alternate JournalPhotochem. Photobiol.
Citation Key / SERVAL ID8952
Peer reviewRefereed
PubMed ID29878409


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