AJNR. American journal of neuroradiology
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AJNR Am J Neuroradiol · Jan 2006
Direct visualization of the human subthalamic nucleus with 3T MR imaging.
Electrical stimulation of the subthalamic nucleus (STN) is an accepted treatment for advanced Parkinson disease (PD). Although procedural details are well established, targeting STN remains problematic because of its variable location and relatively small size (20-30 mm(3)). A combination of anatomic imaging with a stereotactic frame, atlas coordinates, and intraoperative neurophysiology is currently considered the most reliable approach for STN targeting. CT imaging is dependent on atlas coordinates, because the STN is not visualized. The STN is also difficult to visualize directly by using MR imaging at 1.5 T. ⋯ 3T MR imaging appears to be an excellent tool for reliable and accurate direct visualization of the human STN, necessary for precise surgical targeting.
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AJNR Am J Neuroradiol · Jan 2006
Case ReportsIntraspinal leakage of bone cement after vertebroplasty: a report of 3 cases.
We report 3 cases of vertebroplasty-induced intraspinal leakage of bone cement that were referred to us for management. Two patients received decompressive surgery, and one received rehabilitation. The gross surgical finding of yellowish dura mater and intradural fibrosis, adhesion, and microscopic finding of arachnoid membrane fibrosis are suggestive of late effect of thermal injury. These patients had residual lower extremity weakness and urinary and stool problems 13 months, 3 years, and 4.75 years post-vertebroplasty, respectively.
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AJNR Am J Neuroradiol · Jan 2006
Case ReportsNeuropsychological and perfusion MR imaging correlates of revascularization in a case of moyamoya syndrome.
Serial neurocognitive and perfusion MR imaging findings are described in the perioperative course of a 48-year-old woman with a superficial temporal artery to middle cerebral artery bypass for right hemispheric ischemia due to moyamoya syndrome. Neurocognitive testing reflected both global and focal cerebrovascular dysfunction, which suggests that perfusion augmentation following surgical revascularization may engender cognitive and neurologic improvement beyond focal regions of established ischemia.
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AJNR Am J Neuroradiol · Jan 2006
Vasospasm after subarachnoid hemorrhage: utility of perfusion CT and CT angiography on diagnosis and management.
To evaluate the utility of perfusion CT (PCT) combined with CT angiography (CTA) for the diagnosis and management of vasospasm, by using conventional digital subtraction angiography (DSA) as the gold standard. ⋯ A CT survey combining CTA and PCT represents an accurate screening test in patients with suspected vasospasm. However promising, the value of PCT for selecting the best management strategy in such patients will need to be further investigated.