A method and apparatus are provided for the determination of levels of carotenoids and similar chemical compounds in biological tissue such as living skin. The method and apparatus provide a noninvasive, rapid, accurate, and safe determination of carotenoid levels which in turn can provide diagnostic...http://www.google.fr/patents/US6205354?utm_source=gb-gplus-shareBrevet US6205354 - Method and apparatus for noninvasive measurement of carotenoids and related chemical substances in biological tissue
Method and apparatus for noninvasive measurement of carotenoids and related ...