Navegando por Palavras-chave "Tomografia computadorizada helicoidal"

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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.
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    Sistematização do estudo anatômico do aqueduto vestibular por tomografia computadorizada de alta resolução em pacientes com doenças de Ménière unilateral
    (Colégio Brasileiro de Radiologia e Diagnóstico por Imagem, 2006-10-01) Alvarenga, Eliézia Helena de Lima [UNIFESP]; Cruz, Oswaldo Laércio Mendonça [UNIFESP]; Yamashita, Helio Kiitiro [UNIFESP]; Lima, Eliece José de; Alvarenga, Adalberto Martins; Bisinoto, Sirlei Maria Barra; Universidade Federal de São Paulo (UNIFESP); Hospital Samaritano de São Paulo; Universidade de São Paulo (USP)
    OBJECTIVE: To systematize the assessment of vestibular aqueduct by high-resolution computed tomography (HRCT) in patients with unilateral Ménière's disease as compared with a control group. MATERIALS AND METHODS: We have selected 20 patients with unilateral Ménière's disease, according to the guidelines proposed by the American Academy of Otolaryngology - Head and Neck Surgery. The control group consisted of ten individuals with normal audiometric tests. Overall, we have studied 60 ears, equally divided into three groups: group I - Ménière's disease, affected ear; group II - Ménière's disease, non-affected ear; group III - control. All the individuals have undergone temporal bones HRCT. Images were blindly reviewed, trying to evaluate the visibility of the descendent portion of the ventricular aqueduct. Afterwards data were correlated with their respective groups. RESULTS: We have identified the vestibular aqueduct in 95% of ears in group I, 90% in group II, and 100% in group III. CONCLUSION: It is possible to perform a systematic evaluation of the vestibular aqueduct by axial HRCT, using the same radiological technique, anatomical knowledge and sequential images of inner ear structures. With this systematic approach we have obtained a high rate of vestibular aqueduct visualization, with no statistically significant difference between the groups.