Average refractive index of tendon as a function of water content

Marina E. Shvachkina; Dmitry D. Yakovlev; Alexander B. Pravdin; Dmitry A. Yakovlev

doi:10.18287/JBPE18.04.010302

Authors

Marina E. Shvachkina Department of Optics and Biophotonics, Faculty of Physics, Saratov State University, Russia
Dmitry D. Yakovlev Department of Optics and Biophotonics, Faculty of Physics, Saratov State University, Russia
Alexander B. Pravdin Department of Optics and Biophotonics, Faculty of Physics, Saratov State University, Russia
Dmitry A. Yakovlev Department of Optics and Biophotonics, Faculty of Physics, Saratov State University, Russia

DOI:

https://doi.org/10.18287/JBPE18.04.010302

Keywords:

collagen, tissue, refractive index, water content, hydration

Abstract

Experimental data on the dependence of the average refractive index of rat tail tendon (RTT) on water content are reported. Using optical coherence tomography, the average group refractive index (at a wavelength of 930 nm) and cross-section area of rat tail tendon fascicle specimens during their air-drying and rehydration were monitored. The dependence of the average group refractive index of RTT (n_g) on the volume fraction of water (C_w) has been found to be nonlinear and to be well approximated by the quadratic polynomial n_g = 1.5713 – 0.1969C_w – 0.0328(C_w)². The reported data are shown to be in good agreement with previously published data for bovine cornea.

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