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PURPOSE Lesion volume is often used as an end point in clinical trials of oncology therapy. We sought to compare the common method of using orthogonal diameters to estimate lesion volume (the diameter method) with a computer-assisted planimetric technique (the perimeter method). METHODS Radiologists reviewed 825 magnetic resonance imaging studies from 219(More)
PURPOSE To assess the use of nonstandard, variable window width and level review settings in computed tomography (CT) without contrast material administration in the detection of acute stroke. MATERIALS AND METHODS Nonenhanced CT was performed in 21 patients with acute (< 6 hours) middle cerebral arterial stroke and nine control patients. Two blinded(More)
OBJECTIVE Endovascular stent reconstruction is the primary intervention for cervical and intracranial dissections in symptomatic patients refractory to medical management. Advancement of traditional balloon-expanding stents into the distal internal carotid artery and vertebrobasilar artery can be technically challenging and potentially traumatic. METHODS(More)
Intracranial DAVFs are pathologic dural-based shunts and account for 10%-15% of all intracranial arteriovenous malformations. These malformations derive their arterial supply primarily from meningeal vessels, and the venous drainage is either via dural venous sinuses or through the cortical veins. DAVFs have a reported association with dural sinus(More)
IMAGE-guided percutaneous methods of tumor destruction have proven effective for treatment of benign bone tumors as well as for palliation of metastases involving bone and soft tissue sites beyond the liver and lung. Treatment of primary bone tumors is largely restricted to benign tumors, most notably osteoid osteomas, as a single-modality treatment or as(More)
BACKGROUND AND PURPOSE Few reports have described the embolization of head and neck lesions by using direct percutaneous techniques. We report our preliminary experience in the direct percutaneous embolization of hypervascular head and neck tumors by using Onyx in conjunction with standard endovascular embolization techniques. We describe the technical(More)
BACKGROUND AND PURPOSE Spinal dural arteriovenous fistulas are a rare entity that, if left untreated, can lead to considerable morbidity with progressive spinal cord symptoms. The aim of this study was to evaluate the clinical outcome of patients with spinal dural arteriovenous fistulas that were primarily treated with endovascular embolization. MATERIALS(More)
This report presents a 13-year-old girl with an aggressive skeletal lesion involving the posterior elements of the cervicothoracic junction. The lesion was determined to be a Musculoskeletal Tumor Society grade 3 aneurysmal bone cyst based on imaging and pathologic findings. The cyst was treated with endovascular n-butyl cyanoacrylate embolization and(More)
The trigeminocardiac reflex (TCR) is a rare but well-described phenomenon encountered during invasive procedures involving the face, orbit, and cranial base. The reflex is characterized by the abrupt onset of hypotension, bradycardia, asystole, and dysrhythmias. With temporary cessation of the surgical procedure, vital signs typically stabilize without the(More)
BACKGROUND Polyglycolic-polylactic acid (PGLA) coils induce inflammation within a cerebral aneurysm, which in turn is hypothesized to decrease aneurysm recurrence. We present 2 patients, who after aneurysm coiling with PGLA coils, developed mild symptoms and extensive magnetic resonance imaging (MRI) white matter changes. METHODS The first patient was a(More)