Navegando por Palavras-chave "Pitfalls"

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    Pseudolesões hepáticas na ressonância magnética: ensaio iconográfico
    (Colégio Brasileiro de Radiologia e Diagnóstico por Imagem, 2003-10-01) Meirelles, Gustavo de Souza Portes [UNIFESP]; Tiferes, Dario Ariel [UNIFESP]; D'Ippolito, Giuseppe [UNIFESP]; Universidade Federal de São Paulo (UNIFESP)
    Magnetic resonance imaging is currently an important method for the assessment of the liver. As with helical computed tomography, the use of fast magnetic resonance imaging sequences to obtain data from the different phases of vascularization allows the detection and identification of tumors. However, some lesions may mimic true parenchymatous lesions which are interpretation pitfalls. These lesions are called pseudolesions and may occur due to perfusion defects, focal fatty infiltration, and spared areas of fatty liver or artifacts, among other causes. The recognition of these lesions is essential to avoid false-positive results. The aim of this study was to classify, illustrate, and briefly describe these pseudolesions, and to provide alternatives to differentiate pseudolesions from true parenchymatous lesions.
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    Pseudolesões hepáticas na tomografia computadorizada helicoidal: ensaio iconográfico
    (Colégio Brasileiro de Radiologia e Diagnóstico por Imagem, 2003-08-01) Meirelles, Gustavo de Souza Portes [UNIFESP]; D'Ippolito, Giuseppe [UNIFESP]; Universidade Federal de São Paulo (UNIFESP)
    Helical computed tomography has been widely used in the evaluation of the liver parenchyma for clinical and surgical management. The liver is probably the organ for which helical computed tomography examination is best indicated due to hepatic dual blood perfusion and the difference in blood supply between liver tumors and normal parenchyma. However, there are pitfalls in the interpretation of the images that may impair differentiation of true lesions from pseudolesions, particularly for the inexperienced radiologist. These pseudolesions present different shapes, location and characteristics that may mimic parenchymal lesions and their recognition and understanding are essential to avoid misdiagnoses. The aim of this study is to propose a systematic classification of the pseudolesions of the liver using illustrative cases and thus offer alternative means to differentiate these lesions from true parenchymal lesions.