AJNR. American journal of neuroradiology
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AJNR Am J Neuroradiol · Sep 1994
Prevalence of MR evidence of diffuse axonal injury in patients with mild head injury and normal head CT findings.
To assess the prevalence of MR evidence for diffuse axonal injury at 1.5 T in patients with normal head CT findings after mild head injury. ⋯ MR shows evidence of diffuse axonal injury in some patients with normal head CT findings after mild head injury. These lesions may represent the pathologic substrate underlying the postconcussion syndrome that occurs in many patients with moderate to severe head injury.
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AJNR Am J Neuroradiol · Sep 1994
Comparative StudyMagnetization transfer: a potential method to determine the age of multiple sclerosis lesions.
To determine whether magnetization transfer contrast can differentiate acute from chronic lesions in multiple sclerosis. ⋯ Current imaging modalities do not differentiate acute multiple sclerosis lesions from chronic ones. Our data on magnetization transfer show a statistically significant difference in magnetization transfer effect values between lesions of less than 1 year's duration and older lesions. The different values may correspond to the histologic changes of multiple sclerosis plaques over time. Magnetization transfer may be a reliable method for determining the age of multiple sclerosis lesions.
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AJNR Am J Neuroradiol · Sep 1994
Venous congestion: an MR finding in dural arteriovenous malformations with cortical venous drainage.
To present the MR findings of intracranial dural arteriovenous malformations with cortical venous drainage, emphasizing the parenchymal changes. ⋯ On MR a surplus of pial vessels suggests a dural arteriovenous malformation with cortical venous drainage. The MR finding of white matter edema deep in the cerebral or cerebellar hemispheres is direct evidence of a venous congestion.