In Vitro Study of Optical Properties of the Central Nervous System Components

The optical properties of the central nervous system components, such as gray and white matter, medulla oblongata, cerebellum and spinal cord, were studied in animal samples in vitro. Contact measurements were carried out by spectroscopy at two wavelengths of the red and near-infrared ranges in the backscattering mode. Non-contact measurements were conducted by the method of wideband spectrophotometry of the visible range in the reflection mode. The obtained quantitative narrow-spectral values of the absorption and reduced scattering coefficients of tissue samples and the relative results of the broadband measurements were analyzed. The received results are applicable to develop criteria in the tasks of automatized detection and identification of structural heterogeneities in the tissue volume for cases of surgical resection and real-time recognition of brain tissues abnormalities.