The Science of Phototherapy reviews the current status of established and emerging phototherapies, including recent information about the mechanisms of action. The major topics are developed from basic principles in order to be most useful to readers with different backgrounds. The book describes the operation of phototherapy instrumentation, including conventional and laser light sources, photodetectors, radiometers, and optical fibers and features a comprehensive treatment of tissue optics ranging from basic principles to clinical applications. The applications of phototherapy to light dosimetry, optical diagnosis, and laser surgery are further developed with worked examples, and the more quantitative topics are explained with the use of illustrations. The book includes an extensive bibliography.