Downs Nathan, Parisi Alfio
Centre for Rural and Remote Area Health, University of Southern Queensland, Toowoomba, 4350, Australia.
Photochem Photobiol Sci. 2007 Jan;6(1):90-8. doi: 10.1039/b607553c. Epub 2006 Oct 18.
A three dimensional computer model of the human face has been developed to represent solar ultraviolet exposures recorded by dosimeter measurements on a manikin headform under low cloud conditions and various solar zenith angles. Additionally, polysulfone dosimeters have been successfully miniaturised to provide the detailed measurements required across the face. The headform used in this research was scanned at 709 individual locations to make a wireframe mesh consisting of 18 vertical contours and 49 horizontal contours covering half the manikin's frontal facial topography. Additionally, the back of the headform and neck have also been scanned at 576 locations. Each scanned location has been used as a viable dosimeter position on the headform and represents a grid intersection point on the developed computer wireframe. A series of exposures recorded by dosimeters have been translated into three dimensional exposure ratio maps, representing ambient solar ultraviolet exposure. High dosimeter density has allowed for the development of individual topographic contour models which take into account complex variation in the face and improve upon previously employed techniques which utilise fewer dosimeters to interpolate exposure across facial contours. Exposure ratios for solar zenith angle ranges of 0 degrees -30 degrees, 30 degrees -50 degrees, and 50 degrees -80 degrees have been developed.
已开发出一种人脸三维计算机模型，用于呈现人体模型头部在低云条件和不同太阳天顶角下，通过剂量计测量记录的太阳紫外线暴露情况。此外，聚砜剂量计已成功实现小型化，以提供面部所需的详细测量数据。本研究中使用的人体模型头部在709个单独位置进行了扫描，以制作一个线框网格，该网格由18条垂直轮廓线和49条水平轮廓线组成，覆盖了人体模型正面面部地形的一半。此外，人体模型头部背面和颈部也在576个位置进行了扫描。每个扫描位置都被用作人体模型头部上一个可行的剂量计位置，并代表所开发计算机线框上的一个网格交点。剂量计记录的一系列暴露数据已被转换为三维暴露率地图，代表环境太阳紫外线暴露情况。高剂量计密度使得能够开发出考虑面部复杂变化的个体地形轮廓模型，并改进了以前使用较少剂量计对面部轮廓进行暴露插值的技术。已得出太阳天顶角范围为0度至30度、30度至50度和50度至80度的暴露率。
