REMOTE HOLTER LONGITUDINAL MONITORING - PROMISING DIRECTION IN TELEHEALTH DEVELOPMENT

The aim of the telehealth project is to study possible performance of remote analysis of Holter outcomes. We present experience of of our institution and remore Holter monitoring fulfillment. We studied diagnostic advantages of its remote performance. We used portable recorders and proprietary software. Analysis was performed by three physicians of the functional diagnosis department, Scientific Research Institute - Ochapovsky Regional Clinic Hospital #1. By present we performed more 2000 examinations. Clinical cases demonstrating advantages of remote Holter monitoring are described. We discussed perspective of this direction of telehealth. To this system 25 stations of registration devices were connected up in cities and territories of Krasnodar region. We apply 30 cardio-recorders of various producers. Thus, in Krasnodar region the full-scale system of remote Holter monitoring functions and advances now and this has been reached due to active introduction of modern innovative technologies in the field of communication, informatics and development of the software

Влияние реконструкционных параметров сканирования позитронно-эмиссионного томографа на эффект частичного объема патологического очага

In this work, the following tasks were solved: to perform a comparative analysis of data processing methods when calculating recovery factors; to evaluate the influence of time-of-flight technology and PSF function on the recovery factor and the forecast of recovery factor deviation for potential pathological foci with a diameter of 6–8 mm; to evaluate the influence of parameters of iterative reconstruction algorithms, Gaussian filter and axial filters on the recovery factor. The calculation of the recovery factors was carried out on the basis of quantitative characteristics obtained in the analysis of reconstructions of images of the IEC phantom with six spheres installed inside and filled with a radiopharmaceutical. Eight series of experiments with background / sphere activity ratios 1/3, 1/4, 1/6, 1/8, 1/12, 1/14, 1/16, 1/20 were carried out with the same concentration of activity in the spheres during each separate experiment. The forecast of the effect of the partial volume effect on lesions with a diameter of 6 to 8 mm was carried out, taking into account the used reconstruction algorithms. It is advisable to use the results obtained to harmonize diagnostic protocols for scanning with positron emission tomographs using the input parameters of reconstruction algorithms and filters, which will minimize the error in the quantitative assessment of a radiopharmaceutical when analyzing the dynamics of the development of a pathological process, as well as the response of pathology to therapy.Выполнен сравнительный анализ методов обработки данных при расчете коэффициентов восстановления. Оценено влияние времяпролетной технологии и PSF-функции на коэффициент восстановления и прогноз девиации коэффициента восстановления для потенциальных патологических очагов диаметром 6–8 мм, а также параметров итерационных реконструкционных алгоритмов, фильтра Гаусса и аксиальных фильтров – на коэффициент восстановления. Расчет коэффициентов восстановления выполнен на основе количественных характеристик, полученных при анализе реконструкций изображений фантома IEC c шестью сферами, инсталлированными внутрь и заполненными радиофармацевтическим препаратом. Проведено восемь серий экспериментов с соотношениями активности фон/сфера 1/3, 1/4, 1/6, 1/8, 1/12, 1/14, 1/16, 1/20 при одинаковой концентрации активности в сферах во время каждого отдельного эксперимента. Выполнен прогноз влияния эффекта частичного объема на очаги диаметром от 6 до 8 мм с учетом используемых реконструкционных алгоритмов. Полученные результаты целесообразно использовать для гармонизации диагностических протоколов сканирования на позитронно-эмиссионных томографах за счет входных параметров реконструкционных алгоритмов и фильтров, что позволит минимизировать ошибку при количественной оценке радиофармацевтического препарата при анализе динамики развития патологического процесса, а также отклика патологии на терапию

The Influence of Prolonged High-Concentration Ozone Exposure on Superhydrophobic Coatings in Static and High-Speed Flow Atmospheres

The durability of superhydrophobic coatings under exposure to adverse factors that accompany their exploitation in natural and industrial environments remains a key problem in materials science. One such factor is a notable ozone concentration which can be generated as a result of corona discharge, dielectric barrier discharge, piezoelectric direct discharge, UV light photochemical processes, and others characteristic of the power industry. In this work, the mechanisms of degradation of the superhydrophobic coatings under prolonged exposure to high ozone concentrations at dynamic and nearly static conditions were studied. Our results indicate that in dynamic conditions, when the coatings are subjected to joint action of erosion loads initiated by the high-speed flow of the atmospheric air enriched with ozone, with ozone oxidation activity, the superhydrophobic state degrades quite rapidly. At the same time, in nearly static atmospheric conditions with the same ozone content, the degradation is substantially lower. Our study reveals the role of various factors such as the degradation of the layer of the hydrophobic agent, mechanical deterioration of texture, adsorption of ozone, and contact with water in the discovered behavior of the superhydrophobic coatings

Thermally Induced Gradient of Properties on a Superhydrophobic Magnesium Alloy Surface

Fabrication of superhydrophobic coatings for magnesium alloys is in high demand for various industrial applications. Such coatings not only extend the service life of metal structures, but also impart additional useful functional properties to the coated surface. In this study, we show that nanosecond laser processing of long, thin stripes of magnesium alloys followed by the deposition of a hydrophobic agent onto the magnesium oxide layer is a simple, convenient, and easily reproducible method for obtaining superhydrophobic surfaces with property gradient along the sample. The mechanism of the gradient in wettability and electrochemical properties of the magnesium alloy surface is discussed based on the high-temperature growth of magnesium oxide and its following degradation. The latter is related to the development of internal stresses and the formation of cracks and pores within the oxide layer at prolonged exposure to high temperatures during the interaction of a laser beam with the substrate. The effect of heating during laser processing of magnesium materials with limited sizes on the protective properties of the forming coatings is elucidated