[1] J. P. Celli, B. Q. Spring, I. Rizvi et al., "Imaging and photodynamic therapy: Mechanisms, monitoring, and optimization," Chem. Rev. 110(5), 2795 (2010).

[2] P. Agostinis, K. Berg, K. A. Cengel et al., "Photodynamic therapy of cancer: An update," CA. Cancer J. Clin. 61(4), 250 (2011).

[3] M. T. Jarvi, M. J. Niedre, M. S. Patterson et al., "Singlet oxygen luminescence dosimetry (SOLD) for photodynamic therapy: Current status, challenges and future prospects," Photochem. Photobiol. 82(5), 1198 (2006).

[4] B. Li, S. Xie, Z. Huang et al., "Advances in photodynamic therapy dosimetry," Prog. Biochem. Biophys. 36(6), 676 (2009).

[5] K. R. Weishaupt, C. J. Gomer, T. J. Dougherty, "Identification of singlet oxygen as the cytotoxic agent in photoinactivation of a murine tumor," Cancer Res. 36(7), 2326 (1976).

[6] P. R. Ogilby, "Singlet oxygen: There is indeed something newunder the sun," Chem.Soc.Rev.39(8), 3181 (2010).

[7] J. R. Kanofsky, "Measurement of singlet-oxygen in vivo: Progress and pitfalls," Photochem. Photobiol. 87(1), 14 (2011).

[8] B. Li, B. C. Wilson, "Direct and indirect measurements of singlet oxygen for photodynamic therapy," Proc. 13th Int. Photodynamic Assoc. World Congress, pp. 43-47 (2011).

[9] V. Vyklicky, R. Dě dic, N. Curkaniuk et al., "Spectral- and time-resolved phosphorescence of photosensitizers and singlet oxygen: From in vitro towards in vivo," J. Lumin. doi:10.1016/j. jlumin.2011.12.033 (2011).

[10] H. Wu, Q. Song, G. Ran et al., "Recent developments in the detection of singlet oxygen with molecular spectroscopic methods," Trend. Anal. Chem. 30(1), 133 (2011).

[11] C. Hadjur, G. Wagnieres, P. Monnier et al., "EPR and spectrophotometric studies of free radicals (O°2 -, °OH, BPD-MA°-) and singlet oxygen (1O2) generated by irradiation of benzoporphyrin derivative monoacid ring A," Photochem. Photobiol. 65(5), 818 (1997).

[12] Y. Wei, J. Zhou, D. Xing et al., "In vivo monitoring of singlet oxygen using delayed chemiluminescence during photodynamic therapy," J. Biomed. Opt. 12(1), 014002 (2007).

[13] A. Gollmer, J. Arnbjerg, F. H. Blaikie et al., "Singlet Oxygen Sensor Greenr;: Photochemical behavior in solution and in a mammalian cell," Photochem. Photobiol. 87(3), 671 (2011).

[14] B. R. Rabello, A. P. Gerola, D. S. Pellosi et al., "Singlet oxygen dosimetry using uric acid as a chemical probe: Systematic evaluation," J. Photochem. Photobiol. A 238, 53 (2012).

[15] D. Kessel, M. Price, "Evaluation of diethyl-3-3′- (9,10-anthracenediyl)bis acrylate as a probe for singlet oxygen formation during photodynamic therapy," Photochem. Photobiol. 88(3), 717 (2012).

[16] H. Lin, Y. Shen, D. Chen et al., "Feasibility study on quantitative measurements of singlet oxygen generation using Singlet Oxygen Sensor Green," J. Fluoresc. doi: 10.1007/s10895-012-1114-5 (2012).

[17] J. Mosinger, K. Lang, J. Hostomsky et al., "Singlet oxygen imaging in polymeric nanofibers by delayed fluorescence," J. Phys. Chem. B 114(48), 15773 (2010).

[18] Y. Shen, H. Lin, Z. Huang et al., "Indirect imaging of singlet oxygen generation from a single cell," Laser Phys. Lett. 8(3), 232 (2011).

[19] A. A. Krasnovsky Jr., "Luminescence and photochemical studies of singlet oxygen photonics," J. Photochem. Photobiol. A 196(2-3), 210 (2008).

[20] A. A. Krasnovsky Jr., "Photosensitized luminescence of singlet oxygen in solution," Biofizika 21(4), 748 (1976).

[21] M. Niedre, M. S. Patterson, B. C. Wilson, "Direct near-infrared luminescence detection of singlet oxygen generated by photodynamic therapy in cells in vitro and tissues in vivo," Photochem. Photobiol. 75(4), 382 (2002).

[22] J. Baier, T. Maisch, M. Maier et al., "Singlet oxygen generation by UVA light exposure of endogenous photosensitizers," Biophys. J. 91(4), 1452 (2006).

[23] J. Yamamoto, S. Yamamoto, T. Hirano et al., "Monitoring of singlet oxygen is useful for predicting the photodynamic effects in the treatment for experimental glioma," Clin. Cancer Res. 12(23), 7132 (2006).

[24] A. Jimenez-Banzo, X. Ragas, P. Kapusta et al., "Time-resolved methods in biophysics. 7. Photon counting vs. analog time-resolved singlet oxygen phosphorescence detection," Photochem. Photobiol. Sci. 7(9), 1003 (2008).

[25] J. Schlothauer, S. Hackbarth, B. Roder, "A new benchmark for time-resolved detection of singlet oxygen luminescence — Revealing the evolution of lifetime in living cells with low dose illumination," Laser Phys. Lett. 6(3), 216 (2009).

[26] B. Li, H. Lin, D. Chen et al., "Detection system for singlet oxygen luminescence in photodynamic therapy," Chin. Opt. Lett. 8(1), 86 (2010).

[27] W. Baumler, J. Regensburger, A. Knak et al., "UVA and endogenous photosensitizers—The detection of singlet oxygen by its luminescence," Photochem. Photobiol. Sci. 11(1), 107 (2012).

[28] M. T. Jarvi, M. J. Niedre, M. S. Patterson et al., "The influence of oxygen depletion and photosensitizer triplet-state dynamics during photodynamic therapy on accurate singlet oxygen luminescence monitoring and analysis of treatment dose response," Photochem. Photobiol. 87(1), 223 (2011).

[29] H. Lin, D. Chen, M. Wang et al., "Influence of pulseheight discrimination threshold for photon counting on the accuracy of singlet oxygen luminescence measurement," J. Opt. 13(12), 125301 (2011).

[30] S. Hackbarth, J. Schlothauer, A. Preuss et al., "Time-resolved sub-cellular singlet oxygen detection- ensemble measurements versus single cell experiments," Laser Phys. Lett. 9(6), 474 (2012).

[31] L. K. Andersen, Z. Gao, P. R. Ogilby et al., "A singlet oxygen image with 2.5 μm resolution," J. Phys. Chem. A. 106(37), 8488 (2002).

[32] I. Zebger, J. W. Snyder, L. K. Andersen et al., "Direct optical detection of singlet oxygen from a single cell," Photochem. Photobiol. 79(4), 319 (2004).

[33] J. W. Snyder, E. Skovsen, J. D. Lambert et al., "Sub-cellular, time-resolved studies of singlet oxygen in single cells," J. Amer. Chem. Soc. 127(42), 14558 (2005).

[34] M. J. Niedre, M. S. Patterson, A. Giles et al., "Imaging of photodynamically generated singlet oxygen luminescence in vivo," Photochem. Photobiol. 81(4), 941 (2005).

[35] B. Hu, N. Zeng, Z. Liu et al., "Two-dimensional singlet oxygen imaging with its near-infrared luminescence during photosensitization," J. Biomed. Opt. 16(1), 016003 (2011).

[36] S. Lee, M. E. Isabelle, K. L. Gabally-Kinney et al., "Dual-channel imaging system for singlet oxygen and photosensitizer for PDT," Biomed. Opt. Express 2(5), 1233 (2011).