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Proceedings Paper

Calculation of singlet oxygen formation from one photon absorbing photosensitizers used in PDT
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Paper Abstract

Advances in biophotonic medicine require new information on photodynamic mechanisms. In photodynamic therapy (PDT), a photosensitizer (PS) is injected into the body and accumulates at higher concentrations in diseased tissue compared to normal tissue. The PS absorbs light from a light source and generates excited-state triplet states of the PS. The excited triplet states of the PS can then react with ground state molecular oxygen to form excited singlet - state oxygen or form other highly reactive species. The reactive species react with living cells, resulting in cel l death. This treatment is used in many forms of cancer including those in the prostrate, head and neck, lungs, bladder, esophagus and certain skin cancers. We developed a novel numerical method to model the photophysical and photochemical processes in the PS and the subsequent energy transfer to O2, improving the understanding of these processes at a molecular level. Our numerical method simulates light propagation and photo-physics in PS using methods that build on techniques previously developed for optical communications and nonlinear optics applications.

Paper Details

Date Published: 13 March 2013
PDF: 13 pages
Proc. SPIE 8568, Optical Methods for Tumor Treatment and Detection: Mechanisms and Techniques in Photodynamic Therapy XXII, 85681D (13 March 2013); doi: 10.1117/12.2003133
Show Author Affiliations
M. Potasek, Simphotek, Inc. (United States)
Evgueni Parilov, Simphotek, Inc. (United States)
K. Beeson, Simphotek, Inc. (United States)


Published in SPIE Proceedings Vol. 8568:
Optical Methods for Tumor Treatment and Detection: Mechanisms and Techniques in Photodynamic Therapy XXII
David H. Kessel; Tayyaba Hasan, Editor(s)

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