53 research outputs found
Strategic Targets and Empirical Trends in the Development of Small and Medium Scale Entrepreneurship (the Case of the Volgograd Region)
No full text
SOLITARY PULMONARY NODULES: EFFECTIVENESS OF DYNAMIC CT IN THE DIFFERENTIAL DIAGNOSIS
No full textThe differential diagnosis of solitary pulmonary nodules remains a challenge in oncology. Dynamic contrastenhanced CT is a potentially valuable tool capable of detecting malignancy. The purpose of the study was to evaluate the value of dynamic CT in the differential diagnosis of solitary pulmonary nodules. Material and methods. Fifty two patients with solitary pulmonary nodules underwent CT examination using a GE Optima CT660. The CT protocol included: 1) scan volume from the jugular notch to the end of the diaphragmatic dome; 2) location of the nodule in the lung; 3) scanning time for 30 sec, 1 min, 2 min, 4 min and 6 min following contrast agent injection. The image processing was carried out on an Advantage Workstation for Windows (AW4.5, GE Healthcare). The CT findings were verified by histology after CT-guided transthoracic biopsy of lung lesions and lung surgeries. Results. The sensitivity, specificity and accuracy of dynamic contract-enhanced CT were higher than those without dynamic CT (85, 95 and 92 % versus 71, 95 and 88 %, respectively)
Technical Physics Letters V. 30, I. 09
No full textTechnical Physics Letters -- September 2004
Volume 30, Issue 9, pp. 709-798
A New Method of Determining the Reversible Magnetization Loop of Bulk High-Temperature Superconductors
Yu. S. Ermolaev and I. A. Rudnev
pp. 709-711 Full Text: PDF (40 kB)
Modeling the Behavior of Complex Media by Jointly Using Discrete and Continuum Approaches
S. G. Psakhie, A. Yu. Smolin, Yu. P. Stefanov, P. V. Makarov, and M. A. Chertov
pp. 712-714 Full Text: PDF (156 kB)
The Synthesis and Photoelectric Properties of Si–(Si2)1 – x(ZnS)x Epitaxial Structures
B. Sapaev and A. S. Saidov
pp. 715-716 Full Text: PDF (85 kB)
Ionization Parameters of Some Nitro Compounds on the Surface of Alkali Metal Oxide Bronze
V. I. Kapustin, V. S. Petrov, and A. A. Chernousov
pp. 717-718 Full Text: PDF (29 kB)
Generation of Subnanosecond 10-GHz Pulses in High Peak and High Average Power Mode
S. D. Korovin, S. K. Lyubutin, G. A. Mesyats, V. V. Rostov, S. N. Rukin, B. G. Slovikovsky, M. R. Ul'maskulov, K. A. Sharypov, V. G. Shpak, S. A. Shunailov, and M. I. Yalandin
pp. 719-723 Full Text: PDF (124 kB)
Ionization Kinetics in a Supersonic Xenon Plasma Flow Entering Electric Field
T. A. Lapushkina, R. V. Vasil'eva, A. V. Erofeev, S. A. Ponyaev, and S. V. Bobashev
pp. 724-726 Full Text: PDF (54 kB)
Gas Adsorption on Semiconducting Oxides: A Change in the Work Function
S. Yu. Davydov, V. A. Moshnikov, and A. A. Fedotov
pp. 727-729 Full Text: PDF (42 kB)
The Effect of Neutron Irradiation on the Microhardness of Gallium Arsenide
Z. V. Jibuti, N. D. Dolidze, N. Sikhuashvili, and G. L. Eristavi
pp. 730-731 Full Text: PDF (30 kB)
Electron Chemoemission from Metal to Semiconductor
V. F. Kharlamov, S. N. Romashin, and A. V. Sedov
pp. 732-734 Full Text: PDF (46 kB)
Synergetic Description of Temperature Evolution in Strongly Inhomogeneous Media
S. O. Gladkov
pp. 735-737 Full Text: PDF (35 kB)
Photoelectron Spectroscopy of Thin-Film Yb–Si(100) Structures Formed by Solid Phase Epitaxy at 800 K
D. V. Vyalikh, M. V. Kuzmin, M. A. Mittsev, and S. L. Molodtsov
pp. 738-740 Full Text: PDF (48 kB)
Reconstructing an Object Image Using the Laser Speckle Pattern of the Diffraction Field
B. B. Gorbatenko, V. P. Ryabukho, and L. A. Maksimova
pp. 741-743 Full Text: PDF (179 kB)
Phase Inhomogeneity of Pyroboroncarbon Structure
V. N. Kukin, N. I. Borgardt, A. V. Agafonov, and V. O. Kuznetsov
pp. 744-746 Full Text: PDF (324 kB)
Orientation of Methyl Red Dye Molecules in a Polymer Matrix
A. V. Tomov and A. V. Khomchenko
pp. 747-749 Full Text: PDF (38 kB)
Optical Rectification Effect in Nanocarbon Films
G. M. Mikheev, R. G. Zonov, A. N. Obraztsov, and Yu. P. Svirko
pp. 750-752 Full Text: PDF (48 kB)
Electron Emission from Solid Surfaces Stimulated by Electric Field and Heterogeneous Chemical Reaction
V. F. Kharlamov, A. V. Sedov, and S. N. Romashin
pp. 753-755 Full Text: PDF (49 kB)
Europium Diffusion in Single Crystal Samarium Sulfide
V. A. Didik, E. A. Skoryatina, V. P. Usacheva, A. V. Golubkov, and V. V. Kaminskii
pp. 756-758 Full Text: PDF (41 kB)
Textured Tin Dioxide Films for Gas Recognition Microsystems
V. V. Sysoev, N. I. Kucherenko, and V. V. Kissin
pp. 759-761 Full Text: PDF (162 kB)
Photosensitivity of Surface Barrier Structures Based on Cu(In,Ga)Se2 Films Grown by Codeposition in Vacuum
V. Yu. Rud', Yu. V. Rud', V. F. Gremenok, and G. A. Il'chuk
pp. 762-764 Full Text: PDF (202 kB)
Peculiarities of the MBE Growth of Nanowhiskers on GaAs(100) Substrates
I. P. Soshnikov, A. A. Tonkikh, G. E. Cirlin, Yu. B. Samsonenko, and V. M. Ustinov
pp. 765-768 Full Text: PDF (175 kB)
Magnetoelectric Response of a Multilayer Ferrite–Piezoelectric Structure to Magnetic Field Pulses
A. Y. Ostashchenko, K. E. Kamentsev, Y. K. Fetisov, and G. Srinivasan
pp. 769-771 Full Text: PDF (44 kB)
Effect of the Initiating Pulse Energy on the Kinetics of Preexplosion Processes in Silver Azide
É. D. Aluker, A. G. Krechetov, A. Yu. Mitrofanov, and A. S. Pashpekin
pp. 772-773 Full Text: PDF (27 kB)
Peculiarities of the Kinetics of Explosive Decomposition of Silver Azide Initiated by a Pulsed Electron Beam
B. P. Aduev, G. M. Belokurov, S. S. Grechin, and E. V. Tupitsin
pp. 774-775 Full Text: PDF (36 kB)
Obtaining a Dispersed Liquid–Gas Mixture Using a Piston Machine: Method and Possible Applications
Yu. V. Alekhanov, A. E. Levushov, A. A. Logvinov, S. A. Lomtev, and E. E. Meshkov
pp. 776-778 Full Text: PDF (86 kB)
Synchronization of Spectral Components of Coupled Chaotic Oscillators
A. A. Koronovskii, O. I. Moskalenko, and A. E. Hramov
pp. 779-783 Full Text: PDF (174 kB)
High-Intensity X-ray Microbeams Obtained Using a Cylindrical Polycapillary Structure
A. Yu. Romanov and I. V. Dmitriev
pp. 784-785 Full Text: PDF (39 kB)
Interplay of Surface Effects in a Thin Nematic Liquid Crystal Layer
S. L. Lopatnikov and G. Gillespie, Jr.
pp. 786-790 Full Text: PDF (162 kB)
A Modified Kolmogorov Model and the Growth Rate of a Crystal Face of Arbitrary Size
N. V. Sibirev and V. G. Dubrovskii
pp. 791-794 Full Text: PDF (52 kB)
Electron Transport Effects in the IR Photoconductivity of InGaAs/GaAs Structures with Quantum Dots
V. M. Danil'tsev, M. N. Drozdov, L. D. Moldavskaya, V. I. Shashkin, A. V. Germanenko, G. M. Min'kov, and A. A. Sherstobitov
pp. 795-798 Full Text: PDF (53 kB)Archived web conten
Pulmonary Mucinous Adenocarcinoma
No full textMucinous adenocarcinoma is a rare malignant tumor of the lung, which is accompanied by extremely scarce and nonspecific symptoms. This leads to an increase in the timing of its recognition, especially in young women. Given the poor prognosis of the pathlogy, the problem of its early diagnosis with histological and immuno-histochemical studies is extremely urgent. The presented clinical case demonstrates the possibilities of computed tomography with intravenous contrast enhancement in a young woman for the diagnosis of mucinous lung adenocarcinoma
INFLUENCE OF THE AGE OF THE DIAGNOSIS AND THE BEGINNING OF SPECIFIC THERAPY ON MAIN CLINICAL AND LABORATORY MANIFESTATIONS OF A DISEASE IN PATIENTS WITH CYSTIC FIBROSIS
No full textBackground: To establish features of a clinical course of a disease at patients depending on age of firstly determine diagnosis of cystic fibrosis. Patients and methods: We examined 130 patients with cystic fibrosis aged under 25 years old. Depending on the age of diagnosis 3 groups of patients were formed: diagnosed at the age of 0–7, 8–18 and 18–25 years old. Results: There were no differences in the main anthropometric, functional, microbiological characteristics and frequency of complications at the age of 25 years between the patients of all three groups. However significant differences in «severity» of genotypes are defined: in group with the diagnosis established at preschool age, «severe» genotypes dominated, in group with the diagnosis established in 7–18 and 18–25 years, — «mild» genotypes. Importance of treatment with dornase alfa in all patients with cystic fibrosis regarding age of establishment of the diagnosis was shown. Conclusion: Early diagnostics determines appropriate beginning of the treatment, which can improve the further prognosis of the disease course. However late diagnostics in patients with «mild» genotype does not have significant influence on the clinical course at the age of 25 years old, which proves protective effects of «mild» mutations
Kaposi's sarcoma in a senile patient with rheumatoid arthritison long-term combination immunosuppressive therapy
No full textOpportunities and limitations of CT - assessment of neoadjuvant chemoradiation therapy of gastric cancer
No full textPurpose of the study. To study the possibilities of computed tomography in assessing the immediate antitumor effect of preoperative prolonged chemoradiotherapy in patients with primary and recurrent gastric cancer.Materials and methods. Twenty nine consecutive patients with locally advanced and recurrence cancer of the stomach, who underwent CT for the assessment of tumor response of neoadjuvant chemoradiotherapy of gastric cancer, were prospectively enrolled in our study. All patients underwent the method of neoadjuvant chemoradiotherapy developed in our Center. MDCT was performed before chemo-radiotherapy and 3.5-5 weeks after its completion.Results. Among the patients with primary gastric cancer (n = 24) it is necessary to explore three aspects: symptoms of the tumor response, tumor size and structure.CT allowed very clearly follow the symptoms of the tumor response. On the prechemoradiotherapy CT, two tumors were diagnosed as cT0-3 stage, 22 tumors as cT4. After the chemoradiotherapy 13 tumors were diagnosed as cT0-3 stage, 11 tumors as cT4 stage (x2=11,6; p<0.01).We analyzed the quantitative parameters, which included the maximal wall thickness perpendicular to the gastric lumen and the maximal square of the tumor. The maximal wall thickness (p<0.001) and the maximal area of the tumor (p<0.001) decreased significantly in postchemoradiotherapy scans compared to the baseline.CT texture analysis after the completion of radiochemotherapy showed that the primary tumors became more homogenous with the multilayer pattern, especially in the peripheral portion of the residual tumor, a marked enhancement of the mucosal layer of the stomach in 17 of 24 patients (71%) in the arterial phase and in 20 of 24 patients (83%) in the portal and/or venous phases.Accurate measurement of the tumor before and after the therapy allowed the evaluating the response to therapy by RECIST 1.1 criteria. Among the patients with recurrent gastric cancer partial response was observed in 2, stable disease in 2, progressive disease in 1.Conclusion. CT significantly improves capability of neoadjuvant therapy response evaluation in patients with gastric cancer. It is necessary to explore three aspects: symptoms of the tumor response, tumor size and attenuation
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