X Ray Computerized
Mostrando 13-24 de 26 artigos, teses e dissertações.
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13. Doses e risco de radiação em estudo tomográfico computadorizado do tórax com tecnologia de quatro cortes
The computerized tomography (CT) is an important method for studying chest pathologies to provide its morphological and functional analysis and to allow a specific therapeutic approach of signs or symptoms resulting from diseases. Since CT uses ionizing radiation, it should be considered that a precise balance between risks and benefits must be achieved in o
Publicado em: 2006
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14. EXPERIMENTAL STUDY OF MECHANISMS OF SAND PRODUCTION USING X-RAY COMPUTERIZED TOMOGRAPHY / ESTUDO EXPERIMENTAL DOS MECANISMOS DE PRODUÇÃO DE AREIA EMPREGANDO TOMOGRAFIA COMPUTADORIZADA DE RAIOS-X
During productive phase of the well, manytimes there is simultaneous production of the solid particles detached from matrix of the reservoir rock. This phenomenon receive the name of the sand production. In this case stress and flow conditions around of the well are fundamental factors for deflagration of the process. Stress concentration in the wall of the
Publicado em: 2004
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15. Adenocarcinoma primário de duodeno
Primary adenocarcinoma of the duodenum is an extremely rare disease, and represents only 0.35% of all gastrointestinal malignancies. Early detection of the disease may be difficult because of the absence of pathognomonic symptoms. The authors relate one case of a adenocarcinoma of the duodenum in a 61-year-old white man with a history of abdominal pain for a
Revista do Colégio Brasileiro de Cirurgiões. Publicado em: 2002-06
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16. Desenvolvimento de metodos para avaliação de processos de filtração por meio de simulação por meio de simulação numerica e tomografia de raios-x / Development of methods for evaluation of filtration process through numerical simulation and x-ray tomography
The development of methods for analysis of filters and filtration process, using X-ray computerized tomography, digital image processing and numerical simulation, was the objective of this work. Tests conventionally used by filter manufacturers are made through the measurement ofparameters, such as flow and pressure, at upstream and downstream ofthe filter.
Publicado em: 2001
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17. Visualização e analise do deslocamento imiscivel e instavel em meio poroso consolidado
The main objective of this study is to investigate, at laboratory scale, the influence of both displacement velocity and mobility ratio on the relative permeability and geometry of two phase immiscible flow, in a naturally consolidated porous medium, in the presence of conate water saturation. The displacement experiments were carried out in cylindrical core
Publicado em: 1997
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18. Tratamento do megaesofago pela mucosectonia conservação da tunica muscular esofagica por via cervicoabdominal
The partial or total esophagectomy without thoracotomy has been used with great frequency for the last few years to benign affections, specially in the advanced megaesophagus. Although this procedure presents advantages of avoiding the compromise of lung dynamics, it is not free of complications. Among these, we have to emphasize the opening of pleura with h
Publicado em: 1996
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19. Determinação de porosidade e saturações de fluidos atraves da tomografia computadorizada de raios-x
X-Ray Computerized Tomography (Cf) is a non destructive analysis technique that allows the visualization of the internal structure of an object. Its applications in the petroleum industry include, among others, reservoir rock characterization and multiphase fluid flow studies in pomus media. This work presents the principIes of this imaging technique and the
Publicado em: 1993
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20. Minitomografo de raio-X e raio-gama computadorizado para aplicações multidisciplinares
The main result of this thesis is the development, implementation and use of an X-ray and y-ray computerized minitomography scanner with possible applications in multidisciplinary fields particularly in soil physics. The hardware is basically a mechanical table with two step motors, one for rotation and another for translation motions, radioactive,source, co
Publicado em: 1987
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21. Models of triple-stranded polynucleotides with optimised stereochemistry.
Detailed models are presented for the triple-stranded polynucleotide helices of poly (U)-poly (A)-poly (U) (two forms), poly (U)-poly d (A) -poly (U), poly d(C)-poly d(I)-poly d(C), poly d(T)-polyd(A)-poly d(T) and poly (I)-poly (A)-poly (I). The models were genrated using a computerized, linked-atom procedure which preserves standard bond lengths, bond angl
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22. Infantile Cardiac Fibromatosis: Correlation of Antemortem and Necropsy Findings
In the case presented here of a 2-month-old boy with symptoms of upper respiratory infection, the physical examination, chest X-ray film and electrocardiogram led us to suspect congestive heart failure caused by either a primary or infectious cardiomyopathy or by a structural left ventricular outflow tract obstruction. The echocardiographic findings were the
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23. RADIONUCLIDE COMPUTED TOMOGRAPHY: APPLICATIONS IN CARDIOVASCULAR DISEASE
Tomography is an imaging modality in which information in one plane is displayed in focus while information from overlying and underlying planes is either blurred or eliminated. As a result, there is an improvement in the contrast of structures in the plane of interest. Computerized axial tomography (CAT) is an imaging modality in which a digital computer ma
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24. Prevalence, aetiology and management of heart failure in general practice.
BACKGROUND: There is a high level of morbidity and mortality among patients with heart failure. Management of the condition has changed substantially in recent years. However, there is little information on the management of heart failure in general practice. AIM: A study was carried out in 1994 to assess the prevalence, aetiology and management of heart fai