Abstract
The work is aimed at the development and experimental testing of the polarization-spectral method for analyzing the polycrystalline structure of the synovial fluid films of a human joint. comparing the sensitivity, specificity and accuracy of the methods of polarimetry in the diagnosis and differentiation of the above pathological conditions of the joints, we can conclude: the highest sensitivity, specificity and accuracy are demonstrated by the method of spectropolarimetry, sensitivity reaches 92 - 93%, specificity - 82 - 86%, and accuracy - 88% - 89%. additionally, the possibility of diagnosing the type of brain stroke by changing the polarization spectral characteristics is considered.