301 resultados para Imágen por resonancia mágnética
La presencia de PISA en la literatura cient??fica y su tratamiento en la prensa diaria internacional
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Resumen tomado de la publicaci??n
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Diffusion Tensor Imaging (DTI) is a new magnetic resonance imaging modality capable of producing quantitative maps of microscopic natural displacements of water molecules that occur in brain tissues as part of the physical diffusion process. This technique has become a powerful tool in the investigation of brain structure and function because it allows for in vivo measurements of white matter fiber orientation. The application of DTI in clinical practice requires specialized processing and visualization techniques to extract and represent acquired information in a comprehensible manner. Tracking techniques are used to infer patterns of continuity in the brain by following in a step-wise mode the path of a set of particles dropped into a vector field. In this way, white matter fiber maps can be obtained.
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Este artículo convoca a adoptar una posición equilibrada en el análisis de las dimensiones e implicaciones que las crisis individuales de los países andinos tienen para la seguridad subregional. El autor parte de la premisa de que EE.UU. carece de una política clara frente a los problemas de la subregión y sostiene que en este país existe una sensación de pérdida de control, que hace que el tema del narcotráfico se convierta en el único con resonancia política. El autor plantea la necesidad de desarrollar un enfoque multilateral que garantice la seguridad subregional, y coloca a la crisis colombiana como la más grave y preocupante.
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Entre el amor y el deber… es una novela histórica que posee una evidente intertextualidad con la tradición italiana, que va desde los ecos de Petrarca, a la resonancia de los largos poemas de caballería, hasta llegar a reflejar los sentimientos románticos de Giacomo Leopardi, lo que muestra que Pozo Monsalve era un buen lector y estaba versado directa o indirectamente con el fenómeno de los petrarquismos y de la tradición literaria de Italia.
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Este artículo expone los vínculos entre las élites charqueñas y rioplatenses desde mediados del siglo XVIII hasta inicios del siglo XIX, con una mirada que incorpora la relación territorial y el vínculo de las culturas políticas que se entretejen en la conformación de ambas élites. El trabajo da cuenta de los vínculos políticos entre el mundo charqueño y el rioplatense, asumiendo ambas realidades como vinculadas e interdependientes, y muestra que dicho vínculo estuvo configurado por narraciones y preocupaciones comunes, el impacto de la crisis imperial de 1808, la resonancia de la insurgencia indígena en los años previos (La Gran Regelión de los Andes y la Rebelión de Túpac Katari) y las experiencias autonomistas del mundo andino: La Plata (Chiquisaca) y La Paz. Se utilizan los aportes de la historia conceptual y la sociología política para analizar esos complejos mundos políticos y de conformación de élites.
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La presente investigación tiene como objetivo el análisis de las intervenciones urbanas realizadas por el colectivo de arte contemporáneo “Los Friks,” en términos de representación y resonancia política. Para este fin se han tomado como muestreo pintadas realizadas en el norte, centro, sur y la periferia de Quito a partir del año 2007. Este trabajo estudiará específicamente la zona del Calzado al Sur, el Condado al norte, el Puente 8 frente a la Urbanización Armenia (sector periférico) y los patios traseros de la Casa de Artes 999 ubicada en la calle La Ronda sector Centro Histórico. Con este mapeo se pretende hacer una lectura del trabajo del grupo, en perspectiva del uso del espacio y la configuración de un trayecto visual a lo largo de la urbe. Por otra parte se reflexionará sobre estas manifestaciones creativas como una estrategia de visibilidad en el contexto citadino.
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Pós-graduação em Artes - IA
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Pós-graduação em História - FCHS
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Pós-graduação em Letras - IBILCE
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Fixed mandibular propulsion appliances are an alternative for the treatment of Class II malocclusion in individuals with mandibular deficiency. Since they are fixed appliances, said devices keep the mandible in an anterior-forced position during rest and during all mandibular functions. When a propulsive appliance is used, the lower jaw is displaced forward and downward. This movement leads to a new position of the condyle, which can, ultimately affect the normal functioning of the temporomandibular joint (TMJ). The aim of this paper was to review effects of fixed mandibular propulsive appliance on TMJ. Inclusion criteria considered studies on animals or humans using TMJ radiography, computed tomography, and magnetic resonance imaging. Studies confirm a favorable relation between condyle and glenoid fossa following treatment with fixed mandibular propulsion appliances.
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Profound socio‑cultural transformations that the world has undergone have been followed by new subjective configurations and manifestations of psychic suffering, whose impact and resonance in the psychology clinic, demand especial understanding and management. The aim of this study was to investigate the collective imaginary of Psychology students about contemporary psychic suffering. In the light of the psychoanalytic method, this research utilized the procedure of drawings‑stories with theme in group interview. The set of productions of the drawings‑stories, based on the psychoanalytic narratives written after each group interview, was interpretatively analyzed and allowed the apprehension of the following fields of affective‑emotional meaning: "Loneliness", “Essays on suffering", "Agony of non‑being", "Human contact with suffering", "Avoidance: the great defense", "Non lived lives", "Human despair" and "Multifacetated suffering". The set of analyses allowed the understanding of a collective imaginary in which suffering, that occurs nowadays, consists mainly of feelings of loneliness, for‑ saking, uselessness, spuriousness and existential void.
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Lissencephaly is a condition characterized by a lack of cerebral convolutions and sulci, which results from defective migration of nervous cells precursors in the telencephalus. The cause is presumably genetic. Lhasa-Apso dogs are most frequently affected, even though it may also occur in association with cerebellar hypoplasia in the Irish Setter, Wire-Haired Terrier and Samoieda breeds. This association was also reported in a cat. Clinical signs consist of dementia, aggressiveness, seizures, visual and olfactive dysfunctions, slow postural reactions and reduced menace response. Definitive diagnosis requires exams such as magnetic resonance imaging, cerebral biopsy or necropsy. There is no specific therapy for this disease, and seizures must be treated with anticonvulsants. The aim of this study is to review the literature regarding lissencephaly.
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Cognitive dysfunction syndrome (CDS) is a progressive degenerative disorder of older dogs, characterized by a decline in cognitive function. The main clinical signs consistent with CDS are: disorientation, changes in socio-environmental interaction, sleep-wake cycle disturbance, changes in hygiene habits, urinate and/or defecate in unusual places, decreased physical activity, anxiety and eating disorders. There are no specific diagnostic tests for this condition in vivo, but alterations in neurological examination, cognitive tests and magnetic resonance imaging can be observed. The diagnosis is confirmed by histopathological examination of brain tissue. Diets rich in antioxidants, environmental enrichment with exercise and the use of selegiline and L-deprenyl have been recommended for the treatment of CDS.
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The diagnosis of various diseases has become more accessible and accurate with the rapid development of imaging modalities aiming to assist in medical diagnosis, and thereby in veterinary medicine. Different diagnostic imaging modalities such as ultrasonography, computed tomography, magnetic resonance imaging and scintigraphy can be performed to obtain information about thyroid diseases, each one with advantages and disadvantages, depending on the thyroid disease in question. Diagnostic imaging is a tool that not only assists in the diagnosis, but also helps treatment and assessment of prognosis of thyroid diseases. The aim of this article is to discuss the limitations and benefits of each diagnostic imaging modality available in the veterinary medical field, and also to present the newest diagnostic imaging modalities in order to maximize and make more accurate diagnosis of thyroid diseases.
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OBJETIVO: Avaliar a acurácia e a reprodutibilidade das imagens da ressonância magnética (RM) nas lesões ligamentares traumáticas da coluna vertebral. MÉTODOS: Estudo retrospectivo para avaliação das imagens da RM de 32 pacientes com lesões traumáticas da coluna vertebral submetidos a tratamento cirúrgico. A avaliação das lesões do complexo ligamentar posterior (CLP) por imagens da RM foi realizada independentemente por dois radiologistas. Um grupo de pacientes tinha exames com inclusão de sequência com supressão de gordura sensível ao líquido (STIR ou SPAIR T2), além das imagens de rotina e no outro grupo os exames de RM não incluíam imagens com a supressão da gordura. As avaliações dos exames de imagem foram comparadas com as observações obtidas durante o ato cirúrgico. Foi realizada a analise de reprodutibilidade intra e interobservador entre os dois radiologistas pelo cálculo do coeficiente Kappa. RESULTADOS: Foi observada lesão do CLP em 21/32 pacientes. De forma geral a sensibilidade da RM para lesões do CLP variou entre 88,9% a 100% e a especificidade entre 0 e 50%. A concordância entre a avaliação dos radiologistas foi maior nos exames de ressonância magnética sem a supressão da gordura (Κ=0,6) do que nos exames que incluíram sequências com supressão (Κ=0,34). CONCLUSÃO: A avaliação de lesões dos ligamentos posteriores por meio da RM pelos radiologistas resultou em boa sensibilidade em relação aos achados cirúrgicos, porém com baixa especificidade, reproduzindo resultados da literatura. Na casuística atual a utilização do sinal de edema presente nas sequências com supressão de gordura diminuiu a concordância interobservador.