AJNR. American journal of neuroradiology
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We report the appearance of a cavernous malformation associated with a developmental venous anomaly in a young boy 3 years after radiation therapy for a posterior fossa medulloblastoma. The presence of a stenosis of the venous drainage of the anomaly led us to postulate that venous restrictive disease, induced by radiation therapy, resulted in increased venous pressure and caused the formation of the cavernous malformation.
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AJNR Am J Neuroradiol · Jun 1998
Multiple sclerosis of the spinal cord: diagnosis and follow-up with contrast-enhanced MR and correlation with clinical activity.
Although MR findings in multiple sclerosis (MS) are well known, the relationship between MR-detected lesions and clinical activity has not been studied in the spinal cord. The purpose of this study was to determine whether serial MR imaging provides evidence of disease activity unsuspected on clinical examination and to determine whether it is useful in monitoring patients with MS primarily affecting the spinal cord. ⋯ Serial MR imaging provides evidence of disease activity unsuspected on clinical examination and could be useful in monitoring patients with MS primarily affecting the spinal cord.
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AJNR Am J Neuroradiol · Jun 1998
Cerebral N-acetylaspartate is low in patients with multiple sclerosis and abnormal visual evoked potentials.
Our purpose was to compare cerebral proton MR metabolite changes in patients with multiple sclerosis (MS) and abnormal visual evoked potentials (VEPs) with those in MS patients with normal VEPs. ⋯ In patients with MS, NAA measurements in the optic pathways of the brain were sensitive to VEP abnormalities. NAA was more sensitive to VEP changes than were choline, creatine, MR-detectable lesions, and EDSS score.
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AJNR Am J Neuroradiol · Jun 1998
Comparative StudyActivation of the sensorimotor cortex at 1.0 T: comparison of echo-planar and gradient-echo imaging.
The increasing demand for the clinical application of functional MR imaging raises the question of whether this technique can be routinely performed on 1.0-T MR scanners. To this end, we assessed the feasibility of functional MR imaging at 1.0 T. ⋯ Functional MR imaging of the sensorimotor cortex can be routinely performed at 1.0 T.