Photodynamic therapy is a non-invasive therapy using photosensitizer
and laser to effectively destroy cancer cells. PDT was approved by the
U.S. FDA for clinical application in 1996 and approved for clinical
application by Chinese SFDA in 2003.
Cancer tissue absorbs a great deal of photosensitizer injected intravenously whereas normal tissue absorbs little. Then special laser irradiation is employed to kill tumor. During the process, photosensitizer interacts with cancer cell and leads to intoxication through necrosis of cancer cells on photodynamic effects, thus the tumor gradually disappears.
ture=plcp
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