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Photodynamic therapy

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Photodynamic therapy or PDT is a treatment for cancer which uses a drug known as a photosensitizer/photosensitizing agent and a specific kind of light. On being exposed to a particular wavelength of light, this drug produces a kind of oxygen that kills the cells nearby. Specific photosensitizers with specific wavelengths of light are used by doctors for treating different body areas by PDT technique. The extent to which the light can travel into the patient’s body depends on the wavelength