Learn More
BACKGROUND In patients with acute ischemic stroke caused by a proximal intracranial arterial occlusion, intraarterial treatment is highly effective for emergency revascularization. However, proof of a beneficial effect on functional outcome is lacking. METHODS We randomly assigned eligible patients to either intraarterial treatment plus usual care or(More)
BACKGROUND AND PURPOSE FD technology enables reconstructive repair of otherwise difficult-to-treat intracranial aneurysms. These stentlike devices may induce progressive aneurysm thrombosis without additional implants and may initiate complete reverse vessel remodeling. The associated vascular biologic processes are as yet only partially understood. (More)
BACKGROUND AND PURPOSE MR imaging techniques have proved their efficacy in imaging the head and neck region. In this study, we compared T1-weighted, dual T2-weighted, and fat-suppressed MR imaging and unenhanced and contrast-enhanced 3D time-of-flight MR angiography sequences for detection of head and neck paragangliomas. METHODS Thirty-one patients with(More)
BACKGROUND Extraadrenal paragangliomas of the head and neck are tumors with variable clinical behavior. Because tumor growth as well as surgery can cause disabling loss of function, knowledge of the natural history of paragangliomas is important for the development of treatment strategies. METHODS The tumor volume, growth rate, and tumor doubling time of(More)
BACKGROUND Recent studies using colour-coded Doppler sonography showed that chronic impaired venous drainage from the central nervous system is almost exclusively found in multiple sclerosis (MS) patients. This study aimed to investigate the intracranial and extracranial venous anatomy and the intracerebral venous flow profile in patients with MS and(More)
PURPOSE To determine the test characteristics of magnetic resonance (MR) angiography in the assessment of occlusion of aneurysms treated with coil placement. MATERIALS AND METHODS This was an ethics committee-approved multicenter study. written informed consent was obtained in 311 patients with 343 aneurysms, who had been treated with coil placement and(More)
We investigated the effects of selective embolization in patients with symptomatic bone metastases of differentiated thyroid carcinoma. A total of 41 embolizations was performed in 16 patients. We studied the follow-up (range, 2 months to 8.6 yr) after the first embolization by evaluation of clinical symptoms and tumor dimensions. Success was defined as an(More)
BACKGROUND Only a small percentage of World Federation of Neurologic Surgeons grade V aneurysmal subarachnoid hemorrhage patients have a favorable outcome. The influence of clinical parameters on outcome was assessed. METHODS Retrospective evaluation of consecutive patients admitted from 2000-2007 with grade V subarachnoid hemorrhage at two institutions(More)
BACKGROUND AND PURPOSE Semiautomated methods for ICA stenosis measurements have the potential to reduce interobserver variability and to speed up its analysis. In this study, we estimate the precision and accuracy of a semiautomated measurement for carotid artery stenosis degree and identify and explain differences compared with the manual method. (More)
BACKGROUND AND PURPOSE Therapeutic carotid occlusion is an established technique for treatment of large and giant aneurysms of the ICA, in patients with synchronous venous filling on angiography during BTO. Concern remains that hemodynamic alterations after permanent occlusion will predispose the patient to new ischemic injury in the ipsilateral hemisphere.(More)