We have established that the shape and position of the maximum in the fluorescence spectrum of an indotricarbocyanine dye in tumor and normal tissues in vivo change over time after intravenous injection of the dye. Based on analysis of the spectral properties of the dye in vivo and in blood plasma, the dependence of the properties on the time since injection has shown that in the living body, the environment of the dye molecule changes as the photosensitizer goes from the skin into the tissue. We have established that in tissues in vivo, the dye molecules are localized in a region with low dielectric constant of the medium. We have shown that the change in the ratio of the concentrations of the different forms of hemoglobin in the blood has an effect on the absorption and shape of the fluorescence spectrum of the dye in tissues in vivo.
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Translated from Zhurnal Prikladnoi Spektroskopii, Vol. 77, No. 3, pp. 438–444, May–June, 2010.
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Samtsov, M.P., Voropai, E.S., Mel’nikov, D.G. et al. Spectral luminescence properties of indotricarbocyanine dye in biological tissues. J Appl Spectrosc 77, 406–412 (2010). https://doi.org/10.1007/s10812-010-9346-0
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DOI: https://doi.org/10.1007/s10812-010-9346-0