Distribution of Facial Exposure to Non-melanoma Biologically Effective UV Irradiance Changes by Rotation Angles.
- Author:
Fang WANG
1
;
Jia Ming YU
2
;
De Qi YANG
2
;
Qian GAO
1
;
Hui HUA
1
;
Yang LIU
1
Author Information
- Publication Type:Journal Article
- Keywords: Biologically effective UV; Facial; Non-melanoma; Rotation angles
- MeSH: Circadian Rhythm; Face; Humans; Manikins; Melanoma; etiology; Risk Assessment; Skin Neoplasms; etiology; Sunlight; adverse effects; Ultraviolet Rays; adverse effects
- From: Biomedical and Environmental Sciences 2017;30(2):113-127
- CountryChina
- Language:English
-
Abstract:
OBJECTIVETo show the distribution of facial exposure to non-melanoma biologically effective UV irradiance changes by rotation angles.
METHODSThis study selected the cheek, nose, and forehead as representative facial sites for UV irradiance measurements, which were performed using a rotating manikin and a spectroradiometer. The measured UV irradiance was weighted using action spectra to calculate the biologically effective UV irradiances that cause non-melanoma (UVBEnon-mel) skin cancer. The biologically effective UV radiant exposure (HBEnon-mel) was calculated by summing the UVBEnon-mel data collected over the exposure period.
RESULTSThis study revealed the following: (1) the maximum cheek, nose and forehead exposure UVA and UVB irradiance times and solar elevation angles (SEA) differed from those of the ambient UV irradiance and were influenced by the rotation angles; (2) the UV irradiance exposure increased in the following order: cheek < nose < forehead; (3) the distribution of UVBEnon-mel irradiance differed from that of unweighted UV radiation (UVR) and was influenced by the rotation angles and exposure times; and (4) the maximum percentage decreases in the UVBEnon-mel radiant exposure for the cheek, nose and forehead from 0°to 180°were 48.41%, 69.48% and 71.71%, respectively.
CONCLUSIONRotation angles relative to the sun influence the face's exposure to non-melanoma biologically effective UV.
