RT Journal Article SR Electronic T1 Simplification of the Residual Lumen Geometry in Measuring Carotid Stenosis JF American Journal of Neuroradiology JO Am. J. Neuroradiol. FD American Society of Neuroradiology SP 804 OP 805 VO 28 IS 5 A1 Gernot Schulte-Altedorneburg A1 Frank J. Ahlhelm YR 2007 UL http://www.ajnr.org/content/28/5/804.abstract AB