1. Photodynamic therapy seems particularly effective in treating areas with multiple AK lesions.2. Still, PUVA therapy is often classified as a separate technique from photodynamic therapy . 3. A recent study illustrates the application of a logic gate for photodynamic therapy . 4. Laser treatment or photodynamic therapy or other evolving therapies may prevent this complication. 5. This strategy is based on a strong platform of intellectual property in photodynamic therapy . 6. In 1913 another German scientist, Meyer-Betz, described the major stumbling block of photodynamic therapy . 7. Another clinical study is testing a technique called photodynamic therapy . 8. Photodynamic therapy is a novel treatment that utilitizes light activated molecules to treat the tumor.9. Photodynamic therapy has potential for a noninvasive procedure for dealing with diseases, growth and tumors.10. Because of their photosensitivity, chlorins are in active use as photosensitizing agents in experimental photodynamic therapy .