Multislice computed tomography is currently the imaging modality of choice for evaluating paranasal sinuses and adjacent structures. Such a method has been increasingly utilized in the assessment of anatomical variations, allowing their accurate identification with high anatomical details. Some anatomical variations may predispose to sinusal diseases, constituting areas of high risk for injuries and complications during surgical procedures. Therefore, the recognition of such variations is critical in the preoperative evaluation for endoscopic surgery. Keywords: Multislice computed tomography; Paranasal sinuses; Anatomical variations.A tomografia computadorizada multislice é, atualmente, a modalidade de imagem de escolha para a avaliação dos seios paranasais e das estruturas adjacentes. Ela tem sido cada vez mais utilizada para a avaliação das variações anatômicas, identificando-as de forma precisa e com elevados detalhes anatômicos. Algumas variações anatômicas podem predispor a sinusopatias e constituir regiões de alto risco para lesões e complicações durante atos operatórios. Portanto, o reconhecimento dessas variações é de fundamental importância no pré-operatório de cirurgia endoscópica. Unitermos: Tomografia computadorizada multislice; Seios paranasais; Variações anatômicas.
AbstractResumo
Nuclear Medicine, by integrating information on relative myocardial perfusion, ventricular function and absolute quantitative data such as myocardial blood flow and coronary flow reserve, expands and modifies the scope of evaluation of patients with chronic coronary insufficiency. These measures are producing a paradigm shift in the assessment and management of patients with CAD, allowing the definition of a broad spectrum of coronary vascular dysfunction. These quantitative tools provide a measure of the integrated effects of focal coronary stenoses, diffuse atherosclerosis, and microvascular dysfunction on myocardial perfusion. This data set allows improving the diagnosis and assessment of the extent of epicardial disease, reclassifying the prognosis, demonstrated through robust literature data that confirm the incremental value over other variables in the risk stratification of patients with ischemic heart disease, and allow to identify coronary microcirculatory disease with or without epicardial CAD. A more accurate and sensitive assessment of myocardial tissue ischemia is then obtained. This chapter explores these possibilities, the assessment of myocardial viability, and the future perspectives of Nuclear Medicine, which include the development of new radiopharmaceuticals focused on molecular imaging and the creation of new hybrid devices that combine functional and anatomical information in a single test
Gráfico 5. Distribuição do ∆FEVE Rb-82 segundo vasos acometidos.... Gráfico 6. Distribuição da ∆FEVE MIBI segundo vasos acometidos....... Gráfico 7. Distribuição dos valores de ∆FEVE segundo a CFR global.... Lista de siglas ______________________________________________________________________ Lista de siglas InCor Instituto do Coração Resumo Descritores: Doença das coronárias; Radioisótopos de rubídio; Tomografia computadorizada com tomografia por emissão de pósitrons; Perfusão miocárdica; Função ventricular esquerda; Reserva de fluxo coronariana; Fração de ejeção do ventrículo esquerdo de reserva; Performance diagnóstica.
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