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Spine Neuroimaging: Computed Tomography Diagnostic Signs
Barata Tavares, Joana; Santos, Carolina M; Cordeiro, Inês; Reimão, Sofia; Campos, Jorge GIntroduction: Computed tomography (CT) scans of the spine are among the most frequently performed neuroradiologic exams, studying several pathologies namely degenerative diseases. Specific signs in spine imaging initially described in conventional radiology can be applied to CT scans. The main goal of this work was their identification and characterization. Methods: A review of the main imagiological signs in C...
Diffusion-weighted MR Imaging Characterization of Progressive Multifocal Leucoe...
Barata Tavares, Joana; Geraldo, Ana F; Neto, Lia; Reimão, Sofia; Campos, Jorge GIntroduction: Progressive multifocal leucoencefalopathy (PML) is a subacute demielinating disease of the Central Nervous System caused by the neurotropic virus John Cunningham (JC), common in immunodeficient patients, namely in HIV infection. PML encephalic lesions have a progressive nature that needs characterization and progressive study, especially for evaluating the therapeutic response. Material and Method...
Double Aortic Arch: Incidental Cerebral Angiography Finding in an Adult Patient...
Barata Tavares, Joana; Leite, Inês; Rodrigues, David; Reimão, Sofia; Leitão, João; Sequeira, PauloIntroduction: Cerebral angiography is a technique used to detect cerebral vessel anomalies. It is critical that a neuroradiologist is familiar with the normal anatomic development and its anomalies as, during an angiography, they may influence the way the procedure is done. Methods: Regarding an incidental finding of a double aortic arch during a cerebral angiography in an adult patient, the authors proceeded t...
Intraparenchymal neuroepithelial cysts--imaging findings in four clinical cases.
Reimão, Sofia; Sousa, Rita; Morgado, CarlosNeuroepithelial cysts, heterogeneous group of lesions, are fluid collections similar to CSF, lined by epithelial cells, frequently found in the lateral ventricles and choroidal fissure; intraparenchymal cysts are relatively uncommon. We report CT and MRI imaging findings of four intraparenchymal neuroepithelial cysts, two of which have histological confirmation of the diagnosis. ; Neuroepithelial cysts, hetero...
The contribution of perfusion CT in stroke.
Lopes, Leonor; Sousa, Rita; Ruivo, Joana; Reimão, Sofia; Sequeira, Paulo; Campos, JorgeMultisection computed tomography (MSCT) was introduced in 1998 and improved neuroimaging quality, in particular concerning acute stroke. Previously, non-enhanced CT was used not only to detect early stroke signs, but also to exclude hemorrhage and non-vascular pathology responsible for the acute neurological deficit. Nowadays, using Perfusion CT (PCT) it is possible to obtain a functional study of the cerebral ...
Adult cerebellar medulloblastoma: imaging findings in eight cases.
Sousa, Rita; Sá, Graça; Reimão, Sofia; Lopes, Leonor; Ruivo, Joana; Albuquerque, Luísa; Campos, JorgeMedulloblastoma is a brain tumor of neuroepithelial origin, frequent in children but rare in adults. The imaging pattern is well studied in the pediatric group thought there is controversy about the imaging characteristics in adults. We report CT and MRI imaging findings of 8 adult patients with cerebellar medulloblastoma. The mean age was 29.6 years (16-65 years). The male: female rate was 5:3. Most were later...
Intraparenchymal neuroepithelial cysts--imaging findings in four clinical cases.
Reimão, Sofia; Sousa, Rita; Morgado, CarlosNeuroepithelial cysts, heterogeneous group of lesions, are fluid collections similar to CSF, lined by epithelial cells, frequently found in the lateral ventricles and choroidal fissure; intraparenchymal cysts are relatively uncommon. We report CT and MRI imaging findings of four intraparenchymal neuroepithelial cysts, two of which have histological confirmation of the diagnosis. ; Neuroepithelial cysts, hetero...
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