Journal of neuroimaging : official journal of the American Society of Neuroimaging
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Controlled Clinical Trial
Jugular valve incompetence in transient global amnesia. A problem revisited.
Previous studies have suggested that transient global amnesia (TGA) may be provoked by cerebral venous congestion due to a reflux during Valsalva maneuver (VM) caused by internal jugular venous valve incompetence (IJVVI). We investigated the hemodynamic consequences of postural changes on IJVVI and on intracranial veins in patients with TGA and control subjects. ⋯ Consistent with results of other groups, we found a significantly higher rate of IJVVI in TGA patients compared to controls. However, we found no differences of intracranial venous circulation between groups nor an effect of body position. This sheds doubt on the assumption of a causative effect of IJVVI in TGA.
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Case Reports
Early predictive value of susceptibility weighted imaging (SWI) in pediatric hypoxic-ischemic injury.
Susceptibility weighted imaging (SWI) provides information about the intravascular cerebral blood oxygenation level. Deoxyhemoglobin is increased in tissue with increased oxygen extraction fraction. Accordingly, the draining veins in hypoxic-ischemic brain may reveal abnormally low SWI signal. We report on a boy with hypoxic-ischemic injury (HII) after cardiac arrest and the ability of SWI to depict areas of HII by focusing on the venous cerebral drainage.
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Clinical Trial
MR venography in patients with multiple sclerosis and correlation with clinical and MRI parameters.
Multiple sclerosis (MS) has been associated with chronic cerebrospinal venous insufficiency. We aim to evaluate the correlation between extracranial veins stenosis evaluated with MR venography (MRV) and clinical/MR parameters of MS. ⋯ In MS the presence/severity of jugular vein stenosis identified with 3T-MRV is not related to MR-visible tissue damage. Moreover no abnormal flow parameters were found in stenosed veins.
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Case Reports
Serial CT findings of a rapidly calcified epidural hematoma in a young adult: a case report.
We report serial computed tomography (CT) findings in a rare case of a rapidly calcified epidural hematoma. A 21-year-old female patient was admitted to our hospital after being involved in a motor vehicle accident. An initial cranial CT revealed a right frontal bone fracture. ⋯ Follow-up CT revealed an ossified epidural hematoma (EDH) 17 days after the head injury, and the ossification later thickened. However, a decrease in the width of the EDH was observed during the 9 months of follow-up during which serial CT images were acquired. The EDH resolved 9 months after the initial trauma, but the calcification layer remained thickened.
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We performed a longitudinal analysis based on magnetic resonance (MR) imaging to investigate the brain structural and perfusion changes caused by insulin therapy in patients with type II diabetes. ⋯ In patients with type II diabetes, brain expansion and hyperperfusion were demonstrated 1 year after initiation of insulin therapy, and insulin therapy could contribute to the brain volume gainment in the patients with type II diabetes.