Brain Image
Mostrando 13-24 de 122 artigos, teses e dissertações.
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13. Inclusão de MRI e informação multigrid a priori para inferência bayesiana de fontes de M/EEG / MRI image and multigrid a priori information for bayesian M/EEG source localization
Functional Neuroimaging has evolved in the last few decades with the introduction of techniques such as Positron Emission Tomography or PET and Functional Magnetic Ressonance Image or fMRI [Belliveau et al., 1991]. These allow observing brain activity with a resolution of a few millimeters and, due to the nature of the signal, a time resolution of the order
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 28/04/2011
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14. Avaliação da percepção e da representação do corpo em crianças com Paralisia Cerebral Hemiplégica
Body awareness or perception of ones own body is a fundamental process for controlling the action. Body knowledge is an egocentric reference that allows us to act in our surroundings. Recent studies demonstrate that the processing of knowledge related to the body include several representations and that there are at least three different types of body repres
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 09/02/2011
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15. Human brain magnetic resonance-image segmentation and its evaluation / Segmentação de tecidos do cerebro humano em imagens de ressonancia magnetica e sua avaliação
Segmentation of brain tissues from MR-images has become crucial to advance research, diagnosis and treatment in Neurology. Despite the large number of contributions, brain tissue segmentation is still a challenge, due to problems in image acquisition, large data sets, and anatomical variations caused by surgery, pathologies and differences in sex and age. An
Publicado em: 2010
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16. Relação dos pontos-chave cirúrgicos no crânio com áreas eloquëntes detectadas por ressonância magnética funcional / Relation of surgical key-points in skull with eloquent areas detected by functional magnetic resonance
Neuroimaging studies have a pivotal role in pre-surgical assessment of patients with brain lesions. Magnetic Resonance Imaging (MRI) and Computerized Tomography (CT) are established techniques providing anatomic information of the lesion and surrounding areas. Functional MRI (fMRI) is a recent method applied to probe brain function via hemodynamic response o
Publicado em: 2010
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17. 3D image registration of the human brain / Registro de imagens 3D do cerebro humano
Image Registration is the process that aligns two or more images in a common reference system of spacial coordinates [31]. It is an important problem with several applications in Medical Imaging, enabling, for instance, the analysis of changes in anatomy along time by the registration of images from the same modality, and the study of combined anatomic and p
Publicado em: 2009
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18. Segmentação de tumores de encéfalo em imagens por ressonância magnética baseada em informações texturais. / Brain tumor segmentation in magnetic resonance images based on texture information.
Magnetic resonance images are essential in the diagnosing and treatment of brain tumors due to its high amount of anatomic details. The task of segmenting brain tumor regions in these images makes more exact quantitative analysis feasible, allowing a better tracking of the evolution/regression of the disease. Nevertheless, the execution of such task is burde
Publicado em: 2009
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19. Gesture as image and image as gesture: hand gestures in commun / O gesto como imagem e a imagem como gesto: a gestualidade das mãos na comunicação
The goal of this work is to investigate hand gestures in both communication and culture. It also aims to understand the gesture as image, analyzing some hand gestures in Image History. There are genetic and social-cultural codes interlaced in hand movements. Consequently, there is no way not to take them into account, for hands incorporate everything they re
Publicado em: 2009
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20. Técnicas de computação natural para segmentação de imagens médicas
Segmentação de imagens é um dos problemas de processamento de imagens que merece especial interesse da comunidade científica. Neste trabalho, são estudado métodos não-supervisionados para detecção de algomerados (clustering) e reconhecimento de padrões (pattern recognition) em segmentação de imagens médicas Métodos baseados em técnicas de comp
Publicado em: 2009
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21. PrevalÃncia e perfil anÃtomo-clÃnico-funcional da sÃndrome do nÃo-alinhamento em pacientes vÃtimas de acidente vascular encefÃlico
The Non-Alignment Syndrome (NAS) or "Pusher Syndrome" is a disorder in which hemiparetic/hemiplegic stroke patients bring their weight to their compromised hemibody, in all positions, resisting any attempt to passive posture realignment, pushing itself with the non affected limbs. This change results in loss of balance, increasing the risk of falls in these
Publicado em: 2009
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22. Efeitos da desnutriÃÃo protÃica crÃnica sobre o cÃrtex cerebral e evoluÃÃo ponderal de ratos adultos
Genetic and ambient influences affect the Central Nervous System (CNS) during the whole development process. An adequate nutrition is essential for the formation of the CNS, its functional organization and the development of the organism. Many researches using half-synthetic diets had been developed in laboratory animals to reproduce pathological, biochemica
Publicado em: 2009
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23. Data clustering by optimum-path transform / Agrupamento de dados por florestas de caminhos otimos
This thesis proposes a novel approach for data clustering based on optimum-path forest. The samples are taken as nodes of a graph, whose arcs are defined by an adjacency relation. The nodes are weighted by their probability density values (pdf) and a connectivity function is maximized, such that each maximum of the pdf becomes root of an optimum-path tree (c
Publicado em: 2008
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24. Intracranial neoplasia in dogs: a diagnostic approach / Neoplasias intracranianas em cães: uma abordagem diagnóstica
Neurological disorders, namely intracranial tumors, have a great importance among morbid entities in dogs, manly in animals older then five years, with a mean of age ranging nine years old. The aim of this study was to evaluate clinical cases suspected of having neoplasia and to associate ancillary clinical exams with necropsy findings. Tumors were described
Publicado em: 2008