AJNR. American journal of neuroradiology
-
AJNR Am J Neuroradiol · Mar 2007
Effect of training and experience on qualitative and quantitative CT perfusion data.
To evaluate interobserver reliability of obtaining CT perfusion (CTP) data for qualitative identification of perfusion abnormality and quantitative assessment through regions-of-interest (ROIs) placement. ⋯ Overall, quantitative differences seen in this study would not necessarily affect quality of interpretation of ischemia/infarct region or global cortical perfusion. Therefore, obtaining qualitative and quantitative CTP data can reliably be performed in the clinical setting among observers with various levels of skill and experience when using a uniform and standard technique.
-
AJNR Am J Neuroradiol · Mar 2007
Review Case ReportsSpinal arteriovenous malformations associated with Klippel-Trenaunay-Weber syndrome: a literature search and report of two cases.
Patients with Klippel-Trenaunay-Weber syndrome present with venous varices, cutaneous capillary malformations, and tissue hypertrophy, usually involving an extremity. A small but important subset also harbors arteriovenous malformations (AVMs) of the spine. ⋯ These cases and our review of the literature emphasize the importance of screening the spine for AVMs. In addition, it is also important to investigate for the presence of multiple spinal AVMs.
-
AJNR Am J Neuroradiol · Mar 2007
Comparative StudyStereotactic comparison among cerebral blood volume, methionine uptake, and histopathology in brain glioma.
Vascularity, metabolism, and histologic grade are related in gliomas but the exact determinants of these relationships are not fully defined. We used image coregistration and stereotactic biopsies to regionally compare cerebral blood volume (CBV) and (11)C-methionine (MET) uptake measurements in brain gliomas and to assess their relationship by histopathologic examination. ⋯ Within glial tumors, there is a local relationship between CBV and MET uptake measurements. Both provide indices of focal malignant activity.
-
AJNR Am J Neuroradiol · Mar 2007
Case ReportsAssociation between lumbar epidural injection and development of acute paraparesis in patients with spinal dural arteriovenous fistulas.
We report 3 patients with previously undiagnosed spinal dural arteriovenous fistulas (SDAVFs), who developed acute paraparesis following lumbar epidural steroid injection. MR imaging demonstrated spinal cord T2 hyperintensity, edema and/or enhancement of the conus, and intradural enlarged vascular flow voids. Spinal angiography confirmed SDAVFs arising from pedicles remote from the sites of the epidural steroid injection. Fistulas were eliminated with either endovascular or combination endovascular and open surgical approaches, with subsequent partial resolution of paraparesis.
-
AJNR Am J Neuroradiol · Mar 2007
Case ReportsIdiopathic hypertrophic spinal pachymeningitis: report of two cases with typical MR imaging findings.
Two patients with a chronic progressive myelopathy were successfully surgically treated and idiopathic hypertrophic spinal pachymeningitis (IHSP) was found on histology. In both patients, an extensive extramedullary mass of low T2 signal with peripheral contrast enhancement was compressing the spinal cord on MR imaging. This imaging appearance in patients with chronic progressive myelopathy should suggest the diagnosis of IHSP.