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Lasers in Medical Science
Published in: Lasers in Medical Science 3/2020

01-04-2020 | Diode Laser | Original Article

Elastic scattering spectroscopy for monitoring skin cancer transformation and therapy in the near infrared window

Authors: Kawthar Shurrab, Nabil Kochaji, Wesam Bachir

Published in: Lasers in Medical Science | Issue 3/2020

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Abstract

There is a pressing need for monitoring cancerous tissue response to laser therapy. In this work, we evaluate the viability of elastic scattering spectroscopy (ESS) to monitor malignant transformations and effects of laser therapy of induced skin cancer in a hamster model. Skin tumors were induced in 35 mice, half of which were irradiated with 980 nm laser diode. Physiological and morphological transformations in the tumor were monitored over a period of 36 weeks using elastic scattering spectroscopy, in the near infrared window. Analytical model for light scattering was used to derive scattering optical properties for both transformed tissue and laser-treated cancer. The tissue scattering over the wavelength range (700–950 nm) decreased remarkably as the carcinogen-induced tissue transformed towards higher stages. Conversely, reduced scattering coefficient noticeably increased with increasing the number of laser irradiation sessions for the treated tumors. The relative changes in elastic scattering signal for transformed tissue were significantly different (p < .05). Elastic scattering signal intensity for laser-treated tissue was also significantly different (p < .05). Reduced scattering coefficient of treated tissue exhibited nearly 80% recovery of its normal skin value at the end of the experiment, and the treatment outcome could be improved by adjusting the number of sessions, which we can predict through spectroscopic optical feedback. This study demonstrates that ESS can quantitatively provide functional information that closely corresponds to the degree of pathologic transformation. ESS may well be a viable technique to optimize systemic melanoma and non-melanoma skin cancer treatment based on noninvasive tumor response.
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Metadata
Title
Elastic scattering spectroscopy for monitoring skin cancer transformation and therapy in the near infrared window
Authors
Kawthar Shurrab
Nabil Kochaji
Wesam Bachir
Publication date
01-04-2020
Publisher
Springer London
Published in
Lasers in Medical Science / Issue 3/2020
Print ISSN: 0268-8921
Electronic ISSN: 1435-604X
DOI
https://doi.org/10.1007/s10103-019-02894-2

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