Jacques Thiebot

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PURPOSE To determine quantitatively a possible corpus callosum (CC) involvement in normal aging and white matter diseases. METHODS Midsagittal size and signal of CC were recorded prospectively from 243 routine MR brain examinations. A midline internal skull surface (MISS) and subcutaneous fat signal intensity were measured to calculate CC/MISS and CC/fat(More)
The aim of the present study was to assess the diagnostic accuracy of CT in determining the underlying causes of brain hematomas with a state-of-the art CT. For this purpose, CT and angiographic data of 149 subjects with spontaneous intracerebral hematomas (ICH) were statistically compared in a blind, retrospective study, taking angiography, supported when(More)
We prospectively correlated the findings of magnetic resonance angiography (MRA) with those of transfemoral four-vessel angiography in 54 patients to investigate the direction of flow within the circle of Willis. Our primary goal was to assess the direction of flow using the size of the vessel and signal intensity, without saturation techniques. Analysis of(More)
A 29-year-old woman presented with dilated epidural veins and incapacitating headache after undergoing a lumbar puncture. Two months later, the results of follow-up MR imaging were normal. These findings suggest that temporary dilation of the epidural vein may occur in association with post-lumbar puncture intracranial hypotension syndrome. In these cases,(More)
BACKGROUND AND PURPOSE The noninvasive diagnosis of cerebral vasospasm with the use of conventional transcranial Doppler ultrasonography (TCD) is based on a velocity study of the middle cerebral artery (MCA). The authors report a prospective comparative study between transcranial color-coded sonography (TCCS), conventional transcranial Doppler (TCD), and(More)
Spinal dural arteriovenous fistulas are a rare cause of myelopathy. Nonspecific symptoms may delay the diagnosis. Magnetic resonance imaging and spinal angiography are routinely used to establish the diagnosis. In our case abnormalities on magnetic resonance imaging only suggested spinal dural arteriovenous fistulas. Multidetector row computed tomography(More)
ltrasonography not only permits a detailed assessment of peripheral nerves but also is useful for intrinsic nerve abnormality detection, as in peripheral nerve enlargement (eg, in trauma, peripheral nerve sheath tumors, and nerve compression). Ultrasonography can also be used to locate nerve compression due to an extrinsic factor (eg, compression of the(More)
It is rare to find an arteriovenous fistula of the dura mater associated with a venous sinus occlusion, but this may provide evidence of an etiology. In the case reported, the malformation was probably of congenital origin, the sinus thrombosis having occurred secondarily to the venous stasis adjacent to the fistula.