RT Journal Article SR Electronic T1 Penumbra System: A Novel Mechanical Thrombectomy Device for Large-Vessel Occlusions in Acute Stroke JF American Journal of Neuroradiology JO Am. J. Neuroradiol. FD American Society of Neuroradiology DO 10.3174/ajnr.A1924 A1 Z. Kulcsár A1 C. Bonvin A1 V.M. Pereira A1 S. Altrichter A1 H. Yilmaz A1 K.O. Lovblad A1 R. Sztajzel A1 D.A. Rüfenacht YR 2009 UL http://www.ajnr.org/content/early/2009/12/17/ajnr.A1924.abstract AB