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23 August 2016 Macroscopic singlet oxygen modeling for dosimetry of Photofrin-mediated photodynamic therapy: an in-vivo study
Haixia Qiu, Michele M. Kim, Rozhin Penjweini, Timothy C. Zhu
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Journal of Biomedical Optics, Vol. 21, Issue 8, 088002 (August 2016). https://doi.org/10.1117/1.JBO.21.8.088002
Abstract
Although photodynamic therapy (PDT) is an established modality for cancer treatment, current dosimetric quantities, such as light fluence and PDT dose, do not account for the differences in PDT oxygen consumption for different fluence rates ( ϕ ). A macroscopic model was adopted to evaluate using calculated reacted singlet oxygen concentration ( [ O 2 1 ] rx ) to predict Photofrin-PDT outcome in mice bearing radiation-induced fibrosarcoma tumors, as singlet oxygen is the primary cytotoxic species responsible for cell death in type II PDT. Using a combination of fluences (50, 135, 200, and 250    J / cm 2 ) and ϕ (50, 75, and 150    mW / cm 2 ), tumor regrowth rate, k , was determined for each condition. A tumor cure index, CI = 1 − k / k control , was calculated based on the k between PDT-treated groups and that of the control, © 2016 Society of Photo-Optical Instrumentation Engineers (SPIE) 1083-3668/2016/$25.00 © 2016 SPIE
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Haixia Qiu, Michele M. Kim, Rozhin Penjweini, and Timothy C. Zhu "Macroscopic singlet oxygen modeling for dosimetry of Photofrin-mediated photodynamic therapy: an in-vivo study," Journal of Biomedical Optics 21(8), 088002 (23 August 2016). https://doi.org/10.1117/1.JBO.21.8.088002
Published: 23 August 2016
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KEYWORDS
Photodynamic therapy
Tumors
Oxygen
In vivo imaging
Luminescence
Optical properties
Tissue optics
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