Whole-Body Diffusion-Weighted Magnetic Resonance Imaging and Positron Emission Tomography Combined with Computed Tomography in the Staging of Lymphomas

Objective – to compare the diagnostic efficiency of whole-body diffusion-weighted magnetic resonance imaging (DW-MRI) and positron emission tomography combined with computed tomography (PET/CT) in the staging of lymphomas.Material and methods. The prospective study enrolled 92 adult patients with Hodgkin's lymphoma or non-Hodgkin's lymphoma. Before treatment, all the patients underwent whole-body DW-MRI and PET/CT. The techniques were compared for their efficiency in diagnosing damage to lymph nodes (LNs) and organs and in determining the stage of lymphoma.Results. The sensitivity, specificity, and accuracy of DW-MRI in diagnosing a lesion in the enlarged LNs were 98.2%, 99.9%, and 99.3%, respectively; those of PET/CT were 99.4%, 100.0%, and 99.8%. ROC analysis showed that the efficiency of the techniques in diagnosing a lesion in the enlarged LNs did not differ (p>0.06). The sensitivity of DW-MRI and PET/CT in diagnosing a lesion in the unenlarged LNs was 77.8% and 88.1%, respectively (p<0.001). The sensitivity, specificity, and accuracy of DW-MRI in diagnosing lung damage were 73.3%, 98.7%, 94.6%; those of PET/CT were 86.7%, 98.7%, and 96.7%; those for the spleen were 54.8%, 98.3%, 83.3% and 100.0%, 100.0%, 100.0%; those for bone marrow (BM) were 87.1%, 96.4%, 93.0% and 64.5%, 87.3%, 79.1%,; those for all organs were 72.9%, 98.1%, 91.4% and 80.0%, 96.6%, 92.2%. The ROC analysis indicated that the efficiency of the techniques in diagnosing a lesion in the lung did not differ (p>0.3), that of PET/CT for the spleen was higher (p <0.0001); that of DW-MRI for BM was higher (p<0.0008); that for all organs did not differ (p>0.35). DW-MRI and PET/CT could determine the correct stage of lymphoma in the same number of patients (86%). The new lymphoma staging algorithm involving whole-body DW-MRI in all patients, PET/CT, and BM biopsies according to the established indications made it possible to determine the correct stage of lymphoma in 95% of patients.Conclusion. Whole-body DW-MRI has comparable efficiency to PET/CT in the staging of lymphoma. The new lymphoma staging algorithm based on whole-body DW-MRI is superior to PET/CT and PET/CT with BM biopsy

Parameters of microbiological processes of organic matter destruction in bottom sediments from the Baltic Sea

Microbiological processes of organic matter (OM) destruction in bottom sediments of the Baltic Sea in the winter period (January-February) of 1995 were investigated. Daily rates of some processes reached were as follow: total destruction of OM was 10-130 mg C/m**2 absorption of O2 was 0-59 mg/m**2, release of CO2 was 18-120 mg C/m**2, assimilation of CO2 was 2.6-36 mg C/m**2, sulfate reduction was 2.7-90 mg S/m**2, methanogenesis was 0.06-5.4 ml CH4/m**2, and aerobic methane oxidation was 0-4.3 ml CH4/m**2. It was found that the major part of OM in the sediments was destroyed anaerobically. As this occurred, reduced products of decay were incorporated into bacterial metabolism. In winter products of chemosynthesis and methane compensated for deficiency of OM photosynthesis in the ecosystem

Досвід виробництва жаростійких в'яжучих і бетонів на основі відходів виробництв

Review article on the effective use of secondary production products in the production of heat-resistant binders and concrete. It is shown that the use of secondary production products positively influences the operational properties of heat-resistant binders and concrete. The main directions in the research on the development and improvement of heat-resistant concrete are highlighted and considered. Обзорная статья об эффективном использовании вторичных продуктов производств при производстве жаростойких вяжущих и бетонов. Показано, что использование вторичных продуктов производств положительно влияет на эксплуатационные свойства жаростойких вяжущих и бетонов. Выделены и рассмотрены основные направления в исследованиях по разработке и совершенствованию жаростойких бетонов.Оглядова стаття про ефективне використання вторинних продуктів виробництв при виробництві жаростійких в'яжучих і бетонів. Показано, що використання вторинних продуктів виробництв позитивно впливає на експлуатаційні властивості жаростійких в'яжучих і бетонів. Виділено та розглянуто основні напрямки в дослідженнях з розробки та вдосконалення жаростійких бетонів

Фізико-хімічні основи створення без глинистих скло емалевих шликеров для виробництва захисних покриттів.

В статье приведены физико-химические основы синтеза без глинистых шликеров с научно-обоснованным вовлечением ПАВ. В качестве ПАВ предложены добавки, обеспечивающие оптимальный микрорельеф поверхности стали перед эмалированием.У статті наведені фізико-хімічні основи синтезу без глинистих шликеров з науково-обгрунтованим залученням ПАВ. Як ПАР запропоновані добавки, що забезпечують оптимальний мікрорельєф поверхні стали перед емалюванням

Technological opportunities for sensing of the health effects of weather and climate change: A state-of-the-art-review

Anderson, V.; Leung, A. C. W.; Mehdipoor, H.; Janicke, B.; Milosevic, D.; Oliveira, A.; Manavvi, S.; Kabano, P.; DZYUBAN, Yuliya; Aguilar, R.; Agan, P. N.; Kunda, J.J.; Garcia-Chapeton, G.; Fonseca, V.D.C.; Nascimento, S.T.; Zurita-Milla, R.</p

ODS instrument of ExoMars-2022 project: Structure, main characteristics and results of laboratory calibrations

International audienceThe paper presents the ODS (Optical Depth Sensor) instrument developed at the Institute of S of the Russian Academy of Sciences for the ExoMars-2022 project. Designed for long-term op surface of Mars, ODS shall provide daily measurements of optical thickness of dust and conde in the planet's atmosphere from the illumination of its surface. To participate in the ExoMars-20 ODS instrument was upgraded and underwent a full cycle of ground testing. The paper instrument design, its optical scheme and the spectral characteristics of two optical channels. considers the parameters of the temperature sensor incorporated in the instrument. The resul calibrations of the device parameters such as field of view, spectral characteristics and calibrat temperature sensor are given. In the experiment it is found that the instrument has spectral tr the range of 350-450 and 740-1030 nm, the field of view of the instrument is from 18 to 33° 45° in zenith angle. The instrument has been tested in the temperature range -40 to +40 °C.The paper presents the ODS (Optical Depth Sensor) instrument developed at the Institute of Space Research of the Russian Academy of Sciences for the ExoMars-2022 project. Designed for long-term operation on the surface of Mars, ODS shall provide daily measurements of optical thickness of dust and condensation aerosol in the planet’s atmosphere from the illumination of its surface. To participate in the ExoMars-2022 project, the ODS instrument was upgraded and underwent a full cycle of ground testing. The paper describes the instrument design, its optical scheme and the spectral characteristics of two optical channels. The paper also considers the parameters of the temperature sensor incorporated in the instrument. The results of laboratory calibrations of the device parameters such as field of view, spectral characteristics and calibration of the ODS temperature sensor are given. In the experiment it is found that the instrument has spectral transmittance in the range of 350–450 and 740–1030 nm, the field of view of the instrument is from 18 to 33° and from 35 to 45° in zenith angle. The instrument has been tested in the temperature range –40 to +40 °C