Рентгенография и мультиспиральная компьютерная томография в диагностике травмы вертлужной впадины

Objective. To determine the value of the integrated use of conventional radiography and computed tomography (MSCT) in the diagnosis and assessment of treatment outcomes in patients with fractures of the acetabulum. Materials and methods. The results of examination and treatment of 75 patients with fractures of the acetabulum aged 27 to 49 years using the methods of X-ray and MSCT for the objectification of the results of surgical treatment. Results. The five main types of pelvic fractures involving the acetabulum according to the most frequently used at present anatomical fractures classification of Judet- Letournel are described in detail and demonstrated. Presents the possibility of X-ray and MSCT in patients with injuries of the pelvis before and after reconstructive surgery to restore the integrity of the assessment of the pelvis. Conclusion. MSCT and X-ray are very informative methods of diagnosis of acetabular injury and can accurately determine the type of fracture of the acetabulum, determining the choice of medical tactics, as well as allowing you to assess the results of the treatment.Цель исследования: определить значение комплексного использования традиционной рентгенографии и мультиспиральной компьютерной томографии (МСКТ) в диагностике и оценке результатов лечения у больных с переломами вертлужной впадины. Материал и методы. Проанализированы результаты обследования и лечения 75 больных с переломами вертлужной впадины в возрасте от 27 до 49 лет с помощью методов рентгенографии и МСКТ для объективизации полученных результатов хирургического лечения. Результаты. Детально описаны и продемонстрированы основные 5 типов переломов костей таза с вовлечением вертлужной впадины согласно наиболее часто используемой в настоящее время анатомической классификации переломов по Judet-Letournel. Представлены возможности рентгенографии и МСКТ у больных с повреждениями костей таза до и после реконструктивных операций с оценкой восстановления целостности костей таза. Выводы. МСКТ и рентгенография являются высокоинформативными методами диагностики травмы вертлужной впадины и позволяют точно определять тип перелома вертлужной впадины, определяя выбор лечебной тактики, а также позволяя проводить оценку результатов проведенного лечения

Design and Characterization of a Sharp GaAs/Zn(Mn)Se Heterovalent Interface: A Sub-Nanometer Scale View

The distribution of magnetic impurities (Mn) across a GaAs/Zn(Mn)Se heterovalent interface is investigated combining three experimental techniques: Cross-Section Scanning Tunnel Microscopy (X-STM), Atom Probe Tomography (APT), and Secondary Ions Mass Spectroscopy (SIMS). This unique combination allowed us to probe the Mn distribution with excellent sensitivity and sub-nanometer resolution. Our results show that the diffusion of Mn impurities in GaAs is strongly suppressed; conversely, Mn atoms are subject to a substantial redistribution in the ZnSe layer, which is affected by the growth conditions and the presence of an annealing step. These results show that it is possible to fabricate a sharp interface between a magnetic semiconductor (Zn(Mn)Se) and high quality GaAs, with low dopant concentration and good optical properties

Design and characterization of a sharp gaas/zn(Mn)se heterovalent interface: a sub-nanometer scale view

The distribution of magnetic impurities (Mn) across a GaAs/Zn(Mn)Se heterovalent interface is investigated combining three experimental techniques: Cross-Section Scanning Tunnel Microscopy (X-STM), Atom Probe Tomography (APT), and Secondary Ions Mass Spectroscopy (SIMS). This unique combination allowed us to probe the Mn distribution with excellent sensitivity and sub-nanometer resolution. Our results show that the diffusion of Mn impurities in GaAs is strongly suppressed; conversely, Mn atoms are subject to a substantial redistribution in the ZnSe layer, which is affected by the growth conditions and the presence of an annealing step. These results show that it is possible to fabricate a sharp interface between a magnetic semiconductor (Zn(Mn)Se) and high quality GaAs, with low dopant concentration and good optical properties

Supplementary document for Resource-efficient low-loss four-channel active demultiplexer for single photons - 6555066.pdf

Supplemental documen

Towards Bright Single-Photon Emission in Elliptical Micropillars

In recent years, single-photon sources (SPSs) based on the emission of a single semiconductor quantum dot (QD) have been actively developed. While the purity and indistinguishability of single photons are already close to ideal values, the high brightness of SPSs remains a challenge. The widely used resonant excitation with cross-polarization filtering usually leads to at least a two-fold reduction in the single-photon counts rate, since single-photon emission is usually unpolarized, or its polarization state is close to that of the exciting laser. One of the solutions is the use of polarization-selective microcavities, which allows one to redirect most of the QD emission to a specific polarization determined by the optical mode of the microcavity. In the present work, elliptical micropillars with distributed Bragg reflectors are investigated theoretically and experimentally as a promising design of such polarization-selective microcavities. The impact of ellipticity, ellipse area and verticality of the side walls on the splitting of the optical fundamental mode is investigated. The study of the near-field pattern allows us to detect the presence of higher-order optical modes, which are classified theoretically. The possibility of obtaining strongly polarized single-photon QD radiation associated with the short-wavelength fundamental cavity mode is shown