I. Yu. Yanina,1,2 V. V. Nikolaev,2,3 O. A. Zakharova,2,3 A. V. Borisov,2,4 K. N. Dvoretski,5 K. V. Berezin,1 V. I. Kochubey,1,2 Yu. V. Kistenev,2,6 V. V. Tuchinhttps://orcid.org/0000-0001-7479-26941,2,7
1Saratov State Univ. (Russian Federation) 2Tomsk State Univ. (Russian Federation) 3Institute of Strength Physics and Materials Science of the SB (Russian Federation) 4Siberian State Medical Univ. (Russian Federation) 5Saratov State Medical Univ. (Russian Federation) 6Siberian State Medical Univ. 7Institute of Precision Mechanics and Control (Russian Federation)
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Measurements and modeling of the optical properties of adipose tissue and its components in the terahertz range with a change in tissue temperature were carried out. It was shown that the optical density (OD) of adipose tissue samples decreases with increasing temperature, which can be mainly associated with dehydration of the sample. We can also expect some contribution to the decrease in the OD of suppression of THz wave scattering when matching the refractive indices of scatterers and their environment due to the intake of free fatty acids secreted by adipocytes due to thermally induced cell lipolysis. It is shown that in the experimental model, the difference between the THz absorption spectra of water and oil allows us to estimate the water content in adipose tissue. A comparison of the measurement results and molecular modeling in the terahertz region confirmed the hypothesis about the reasons for the change in the optical properties of heated adipose tissue.
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I. Yu. Yanina, V. V. Nikolaev, O. A. Zakharova, A. V. Borisov, K. N. Dvoretski, K. V. Berezin, V. I. Kochubey, Yu. V. Kistenev, V. V. Tuchin, "Measurement and modeling of optical properties of heated adipose tissue in the terahertz range," Proc. SPIE 11348, Terahertz Photonics, 1134817 (13 April 2020); https://doi.org/10.1117/12.2555656