Subtraction Techniques
Mostrando 1-12 de 41 artigos, teses e dissertações.
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1. Rapid prototyping of three-dimensional biomodels as an adjuvant in the surgical planning for intracranial aneurysms
PURPOSE: To fabricate a three-dimensional biomodels of intracranial aneurysms, using rapid prototyping technology, to facilitate optimal anatomical visualization of aneurysms prior to and during surgery. METHODS: Four intracranial aneurysms cases were selected for this study. Using CT angiography images, the rapid prototyping process was completed using a Po
Acta Cir. Bras.. Publicado em: 2013-11
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2. Especiação redox de crômio em amostras de solos contaminados / Redox especiation of chromium in contaminated soil samples
Chromium and its compounds are employed in various industrial processes, and these activities are responsible for the disposal of significant amounts of materials containing this element in the environment. Due to the known toxic feature of Cr(VI) in biological systems, the determination of chromium species has acquired great importance in environmental chem
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 21/03/2012
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3. A comparison between magnetic resonance angiography at 3 teslas (time-of-flight and contrast-enhanced) and flat-panel digital subtraction angiography in the assessment of embolized brain aneurysms
PURPOSE: To compare the time-of-flight and contrast-enhanced- magnetic resonance angiography techniques in a 3 Tesla magnetic resonance unit with digital subtraction angiography with the latest flat-panel technology and 3D reconstruction in the evaluation of embolized cerebral aneurysms. INTRODUCTION: Many embolized aneurysms are subject to a recurrence of i
Clinics. Publicado em: 2011
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4. Estudo comparativo entre ultra-sonografia com Doppler colorido, angiografia por ressonância magnética, por subtração digital 2D e 3D na doença dos vasos carotídeos cervicais / A comparative study of Doppler ultrasound, magnetic resonance angiography, 2D and 3D digital subtraction angiography in cervical carotid stenoocclusive disease
INTRODUCTION: Noninvasive techniques such as Doppler ultrasound (DUS) and contrast enhanced magnetic resonance angiography (CEMRA) are each day more used in the evaluation of the internal carotid arteries (ICA). On comparison studies 2D digital subtraction angiography (2D DSA) has been considerate as the reference standard, however its an expensive and invas
Publicado em: 2009
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5. Formulação dual em mecânica da fratura utilizando elementos de contorno curvos de ordem qualquer / Dual boundary element formulation in fracture mechanics using curved element of any order
This work presents the dual boundary element formulation applied to linear crack problem. The goal of this research is the evaluation of stress intensity factor for two-dimensional crack problem using three different techniques, which are: the technique of correlation of displacements, the technique based on the state of tension at the crack tip and J integr
Publicado em: 2009
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6. TECHNIQUES FOR THE INCREASE OF PERFORMANCE OF FORWARD TRANSFORMS AND MOTION ESTIMATION DEDICATED ARCHITECTURES OF THE H.264/AVC VIDEO CODING STANDARD / TÉCNICAS PARA O AUMENTO DE DESEMPENHO DE ARQUITETURAS DEDICADAS DAS TRANSFORMADAS DIRETAS E DE ESTIMAÇÃO DE MOVIMENTO DO PADRÃO H.264/AVC DE CODIFICAÇÃO DE VÍDEO PELOTAS 2009
The increasing use of digital video on the Internet, devices and also in mobile digital TV has lead to an increasing interest for research in this area, from both industry and academia. This work follows this trend by proposing the investigation of the main aspects of digital video, video compression and also of the H.264/AVC video compression for the implem
Publicado em: 2009
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7. A cost-effective background subtraction technique.
Background Subtraction is a very important task in image processing because its results are used in algorithms that recognize more complex object behaviors. This proposed research technique extracts movement evidences from difference: 1) between two consecutive frames; 2) between current frame and the fourth previous frame; and 3) between the current frame a
Publicado em: 2008
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8. Chromosome evolution: Karyotype variability in Platyrrhini and studies of sinteny and homologies between human chromosomes / Evolução cromossômica: estudo da variabilidade cariotípica em Platyrrhini e das homeologias e sintenias com cromossomos humanos
We studied the karyotypes of Brazilian monkeys (Platyrrhini, Primates) using both traditional cytogenetic techniques as well as FISH. FISH analysis employed human probes for chromosome 14, 15 and the X chromosome and a probe of the Y chromosome of Brachyteles arachnoides obtained by chromosome microdissection. Twenty-four individuals of Alouatta guariba clam
Publicado em: 2008
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9. Estudo comparativo entre a fixação interna e a fixação in-termaxilar no reparo ósseo de fraturas mandibulares por meio de imagem radiográfica digital.
Conventional radiographic evaluation of fracture healing is not a reliable method, because it depends on the examinators experience and the quality of the exam. Therefore, serial images differing in density, contrast and geometrical projection can lead to a misdiagnosis on the postoperative fracture healing. Even in good quality images, little changes in cal
Publicado em: 2007
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10. Sugar cane harvested area monitoring using MODIS images / Monitoramento da área colhida de cana-de-açucar por meio de imagens do sensor MODIS
Brazil is among the world leaders in producing and exporting several agricultural products and is the largest producer and exporter of sugar and alcohol. The State of São Paulo is responsible for approximately 60% of the entire national production of cane, alcohol and sugar and for 70% of the exportations. In the current globalized market there is a great d
Publicado em: 2007
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11. "Análise por subtração radiográfica digital linear do tratamento de defeitos infra-ósseos humanos de 2 ou 3 paredes por meio de retalho de espessura total reposto associado ou não à proteína derivada da matriz do esmalte" / Linear radiographic digital subtraction analysis of treatment of human 2 or 3-wall intrabony defects by repositioned flap associated or not with enamel derivative matrix protein
A Subtração Radiográfica Digital (SRD) vem sendo vastamente utilizada para inúmeros fins em Odontologia. Uma de suas aplicações é a avaliação do resultado radiográfico de procedimentos regenerativos. Este estudo avaliou radiograficamente defeitos infra-ósseos de 2 ou 3 paredes tratados com a proteína derivada da matriz do esmalte (PME) e/ou o ret
Publicado em: 2006
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12. Utilizando visão computacional para simular comportamentos de multidão de humanos virtuais
This study presents a model to extract information from the real world using computer vision techniques. In particular, we use tracking algorithms to extract the trajectories of filmed people, aiming to simulate and validate the behavior of virtual human crowds.A great challenge when trying to reproduce in a realistic manner (by means of simulation) the beha
Publicado em: 2006