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Radiologists can now use Talairach's bicommissural reference system and simple T-weighted sagittal magnetic resonance imaging (MRI) sections to recognize the central sulcus of the brain with its spatial features. In this study of 50 MRI examinations performed on normal subjects with contiguous 9 mm thick sagittal sections related to a standard proportional(More)
Seizures, which may be the main expression of cerebral arteriovenous malformations (CAVM) can be difficult to control medically. Our goal was to use perfusion-weighted imaging (PWI) in correlation with clinical data to detect abnormal areas of the cerebrum related to a particular type of CAVM (proliferative angiopathy) and to study the pathophysiology. We(More)
Our purpose was to investigate leukoaraïosis (LA) using three-dimensional MR imaging combined with advanced image-processing technology to attempt to group signal abnormalities according to their etiology. Coronal T2-weighted fast fluid-attenuated inversion-recovery (FLAIR) sequences and three-dimensional T1-weighted fast spoiled gradient recalled echo(More)
PURPOSE To define the morphological patterns of cerebral arteriovenous malformations (AVMs) that influence their response to radiosurgery at 2 years. METHODS We retrospectively reviewed the yearly MR and angiographic follow-up studies in 102 patients who had radiosurgical treatment for cerebral AVMs between 1990 and 1992. Parameters studied were maximum(More)
Biological causes provoking dystonia can not be systematized, with the exception of the small group of levodopa-responsive dystonia. Therefore the pathophysiology of the dystonic syndrome can be approached by considering the site of the lesions. In 40 cases of uni or bilateral symptomatic dystonias, this site could be identified with CT Scan or MRI.(More)
BACKGROUND AND PURPOSE Hyperintense vessel sign (HVS) on fluid-attenuated inversion recovery (FLAIR) has been described in hyperacute stroke patients with arterial occlusion. We sought to determine whether HVS was more frequent in patients with intracerebral arterial stenoses than in those without stenosis regardless of the presence of a brain infarct. (More)
The case of a female patient with two traumatic aneurysms diagnosed by serial angiography is reported. The first aneurysms, located on the orbito-frontal branch of the left anterior cerebral artery, was removed. The second aneurysm involving the right middle meningeal artery was treated by endovascular embolization. The causes and physiopathology of such(More)
BACKGROUND AND PURPOSE On diffusion-weighted (DW) images, primary hematomas are initially mainly hyperintense, and then hypointense during the first few days after stroke onset. As in other brain disorders, variations in the T2 relaxation time of the hematoma influence the DW imaging signal intensity. Our aim was to evaluate the contribution of the T2(More)
PURPOSE To evaluate CT and MRI features and long term imaging follow-up of a large series of dysembryoplastic neuroepithelial tumors (DNTS). PATIENTS AND METHODS We retrospectively analyzed CT (100%) and MR imaging (83%) findings of 53 patients with complex (n = 14), simple (n = 6) or non specific histological forms (n = 33) of DNTS. All patients(More)
Several diseases may cause non-specific MR signal abnormalities of the bilateral basal ganglia and thalami. As such, diagnosis of the underlying etiology may be difficult to achieve at imaging. In this review, we will present interpretative guidelines based on clinical data (mode of presentation, previous history, clinical symptoms, and evolution) and(More)