Brain Image
Mostrando 37-48 de 122 artigos, teses e dissertações.
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37. Image segmentation by the image foresting transform / Segmentação de imagens pela transformada imagem-floresta
Despite of the progress over the last two decades, image segmentation remains one of the most difficult challenges in image analysis. More specifically, accurate segmentation methods are likely to be complex, computationally expensive, application-dependent, and often require considerable human interaction. We have investigated methods for interactive segmen
Publicado em: 2006
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38. Comics are imagetic information attached to universitary teaching / As histórias em quadrinhos como informação imagética integrada ao ensino universitário
Comics are indispensable, expressive visual objects for communication and information because they have followed the cultural process of humanity since its beginning. Comics also exist because the technology made them possible. The scientificparadigm has changes from classic Cartesians to quantum, transforming the interaction between man and reality, from a
Publicado em: 2006
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39. Estudo comparativo da localização do seio venoso sagital dorsal no crânio de cães braquicefálicos e mesaticefálicos para craniotomia transfrontal / Comparative evaluation of the dorsal sagittal sinus localization on braquicephaly and mesaticephaly skulls to transfrontal craniotomy
The surgical approaches for craniotomy are describe since the fifties. However, this realization is limited, many times for the absence conclusive diagnosis. The non invasive methods like computed tomography, the lesion locatization and type are easily made. The most important surgical approach is transfrontal craniotomy which promoves brain access. The prin
Publicado em: 2006
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40. Voxel-based analysis of brain perfusion in adult patients with sickle-cell disease / Avaliação da perfusão cerebral de pacientes adultos com doenças falciformes atraves de spect cerebral
Alterações cerebrovascujares são freqüentemente encontradas em pacientes com doenças falciformes (DF) e, na maioria das vezes, são precedidas por alterações insidiosas da perfusão cerebral. O objetivo deste estudo foi o de investigar a perfusão cerebral de pacientes adultos com DF, assintomáticos do ponto de vista neurológico. Foram incluídos 42
Publicado em: 2006
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41. Estudo clinico-molecular e analise da textura epidermica de pacientes com sindrome de Sjogren-Larsson / Molecular genetic study and texture analysis of the epidermis in patients with Sjogren-Larsson Syndrome
Background: Sjögren-Larsson syndrome (SLS) is an autosomal recessive disorder characterized by ichthyosis, mental retardation, and spasticity. Various mutations in the ALDH3A2 gene that codes for fatty aldehyde dehydrogenase (FALDH) are responsible for the disease but the genotype-phenotype relationships are undefined. Objectives: The purpose of this study
Publicado em: 2006
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42. 3D Shape analysis using 1D, 2D and 3D wavelets / Análise de formas 3D usando wavelets 1D, 2D e 3D
Este trabalho apresenta novos métodos para análise de formas tridimensionais dentro do contexto de visão computacional, destacando-se o uso das transformadas wavelets 1D, 2D e 3D, as quais proporcionam uma análise multi-escala das formas estudadas. As formas analisadas se dividem em três tipos diferentes, dependendo da sua representação matemática: f
Publicado em: 2005
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43. Oligodendroglioma in a patient with AIDS: case report and review of the literature
In the last years, new techniques of neuroimages and histopathological methods have been added to the management of cerebral mass lesions in patients with AIDS. Stereotactic biopsy is necessary when after 14 days of empirical treatment for Toxoplasma gondii encephalitis there is no clinical or neuroradiologic improvement. We report a woman with AIDS who deve
Revista do Instituto de Medicina Tropical de São Paulo. Publicado em: 2004-08
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44. Varicella-zoster virus encephalitis in an AIDS patient
A 37-year-old man with a three-year history of Acquired Immunodeficiency Syndrome was admitted with impaired consciousness, seizures and fever. He was on highly active antiretroviral therapy and on neurotoxoplasmosis secondary prophylaxis. Laboratory exams from two months before showed a CD4 cell count of 37/µL and a viral load of 230,000 copies/mL. Three m
Brazilian Journal of Infectious Diseases. Publicado em: 2004-06
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45. Validation of a simple and inexpensive method for the quantitation of infarct in the rat brain
A gravimetric method was evaluated as a simple, sensitive, reproducible, low-cost alternative to quantify the extent of brain infarct after occlusion of the medial cerebral artery in rats. In ether-anesthetized rats, the left medial cerebral artery was occluded for 1, 1.5 or 2 h by inserting a 4-0 nylon monofilament suture into the internal carotid artery. T
Brazilian Journal of Medical and Biological Research. Publicado em: 2004-04
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46. Dimensionality reduction using mean conditional entropy applied for bioinformatics and image processing problems / "Redução de dimensionalidade utilizando entropia condicional média aplicada a problemas de bioinformática e de processamento de imagens"
Dimensionality reduction is a very important pattern recognition problem with many applications. Among the dimensionality reduction techniques, feature selection was the main focus of this research. In general, most dimensionality reduction methods that may be found in the literature privilegiate cases in which the data is linearly separable and with only tw
Publicado em: 2004
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47. Dosimetric evaluation in panoramic and teleradiography procedures / AvaliaÃÃo DosimÃtrica em procedimentos de Radiografia PanorÃmica e Teleradiografias
The present work had as an objective to evaluate the skin surface entrance dose in panoramic and teleradiography procedures in three clinics in Recife - Pernambuco - Brazil, and to contribute with data for the determination of reference levels for supercited extraoral procedures, for this purpose, operational conditions in 3 clinics were evaluated in Recife,
Publicado em: 2004
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48. Noninvasive, in vivo imaging of the mouse brain using photoacoustic microscopy
Noninvasive, high resolution imaging of mouse brain activity is poised to provide clinically translatable insights into human neurological disease progression. Toward noninvasive imaging of brain activity through the hemodynamic response, the dark-field photoacoustic microscopy (PAM) technique was enhanced to image the cortex vasculature of the mouse brain i
American Institute of Physics.