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

Abstract

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.

Methods and instruments of high-resolution transient THz spectroscopy for diagnostics of socially important diseases

“…The NO concentration was measured not to diagnose lung cancer but to study the NO content dy-namics in exhaled breath before and after a radiotherapy session for patients with different cancer diseases (lung cancer and Hodgkin's lymphoma), the mediastinum region and pulmonary tissue of which were irradiated. The data indicate a significant increase (by a factor of two to five) in the NO content directly after the irradiation and thus confirm the hypothesis about the role of this compound in the development of radiation-induced damage of biological tissues [20]. BACTERIUM We measured the ammonia concentration in the breath exhaled by five patients infected by Helicobacter pylori bacterium (screening test) and in breath tests sampled using a special endoscopic equipment directly from patient's stomach.…”

Reduction of polarization deviation effects in terahertz splitter

“…Because of its special position in the electromagnetic spectrum, terahertz wave has many excellent properties and attracts the attention of scientists and researchers all over the world [1][2][3]. Relevant researches show that the unique characteristics of terahertz wave have a wide application prospect in deep space exploration [4,5], nondestructive testing [6,7], medical`diagnosis [8,9], environmental science [10,11], biochemistry [12,13] and basic physics [14][15][16]. With the development of terahertz applications, various functional devices for controlling terahertz waves are urgently needed to meet the needs of various engineering applications.…”