Main Page | See live article | Alphabetical index Photodynamic therapy is a binary treatment involving the use of a photosensitizer and administered light. Tissue damage occurs through an oxygen dependent mechanism when the photosensitizer is activated by the administered light. External links http://www.dartmouth.edu/~eprctr/highlights/high21.htm http://www.massgeneral.org/wellman This article is from Wikipedia. All text is available under the terms of the GNU Free Documentation License.