Using the methods and facilities of nonsteady-state spectroscopy of the subterahertz and terahertz frequency ranges for noninvasive medical diagnosis

This paper discusses ways to implement terahertz-range spectrometers based on the effects of freely damped polarization and rapid traverse of the frequency range. It presents the results of using developed spectrometers to record the presence of ammonia, acetone, and nitric oxide in exhaled air, as well as to analyze a liquid (Custodiol) for flushing transplanted parenchymatous organs.