AJNR. American journal of neuroradiology
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AJNR Am J Neuroradiol · Apr 2013
Controlled Clinical TrialMulticontrast MR imaging at 7T in multiple sclerosis: highest lesion detection in cortical gray matter with 3D-FLAIR.
7T MR imaging has led to improved detection and classification of cortical MS lesions, mainly based on T2*-weighted gradient-echo sequences. Depiction of cortical GM by using the recommended MS imaging protocol has not yet been investigated at 7T. We aimed to investigate prospectively which recommended sequence for clinical use has the highest value at 7T, in terms of GM and WM lesion detection. ⋯ When using recommended clinical sequences at 7T, the best way to detect cortical GM lesions is with 3D-FLAIR and not by GM-specific 3D-DIR or by conventional 2D-T2WI and 3D-T1WI sequences.
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AJNR Am J Neuroradiol · Apr 2013
Comparative Study Clinical TrialEmbolization of meningiomas: comparison of safety between calibrated microspheres and polyvinyl-alcohol particles as embolic agents.
During embolization of meningiomas, intratumoral hemorrhagic complications may occur, especially with the use of small particle sizes. We compared the rate of hemorrhagic complications in 55 patients embolized with 400-μm calibrated microspheres (Embozene) with a historical cohort of 198 patients embolized with smaller PVA particles. ⋯ In this series, embolization of meningiomas by using large (400-μm) calibrated microspheres did not result in any hemorrhagic complications.
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AJNR Am J Neuroradiol · Apr 2013
Screening cervical spine CT in the emergency department, Phase 2: A prospective assessment of use.
The National Emergency X-Radiography Utilization Study Low-Risk Criteria were established to identify patients with a low probability of cervical spine injury in whom imaging of the cervical spine was unnecessary. The purpose of this study was to ascertain the number of unnecessary cervical spine CT studies on the basis of proper application of established clinical guidelines and, secondarily, to determine indications for ordering studies in the absence of guideline criteria. ⋯ Strict application of NEXUS criteria could potentially reduce the number of screening cervical spine CT scans in the setting of blunt trauma; this change would avoid a considerable amount of unnecessary radiation and cost.
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AJNR Am J Neuroradiol · Apr 2013
Predictors of functional outcome after emergency carotid artery stenting and intra-arterial thrombolysis for treatment of acute stroke associated with obstruction of the proximal internal carotid artery and tandem downstream occlusion.
Patients who develop severe stroke symptoms due to acute internal carotid artery occlusion eventually in combination with a thromboembolic obstruction of the middle cerebral artery incur a major risk of developing extensive MCA infarction with a poor outcome. The purpose of this study was to evaluate the outcome for patients with tandem occlusions in the MCA and/or distal ICA, retrospectively, who had undergone stent implantation in the proximal segment of the ICA in addition to intra-arterial thrombolysis. ⋯ Initial stroke severity, degree of successful revascularization, and the side of ischemia were found to independently predict the functional outcome at 3 months after treatment.
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AJNR Am J Neuroradiol · Apr 2013
Traumatic intracranial hematomas: prognostic value of contrast extravasation.
Contrast extravasation within spontaneous intracranial hemorrhage is a well-described predictor of hematoma growth, poor clinical outcome, and mortality. The purpose of this study was to assess the prognostic value of contrast extravasation in acute traumatic intracranial hematomas. ⋯ Contrast extravasation within intracranial hematomas predicts poor in-hospital outcome in the setting of acute traumatic intracranial injuries.