HomeStrokeVol. 44, No. 9Recommendations on Angiographic Revascularization Grading Standards for Acute Ischemic Stroke Free AccessResearch ArticlePDF/EPUBAboutView PDFView EPUBSections ToolsAdd to favoritesDownload citationsTrack citationsPermissions ShareShare onFacebookTwitterLinked InMendeleyReddit Jump toFree AccessResearch ArticlePDF/EPUBRecommendations on Angiographic Revascularization Grading Standards for Acute Ischemic StrokeA Consensus Statement Osama O. Zaidat, MD, Albert J. Yoo, MD, Pooja Khatri, MD, Thomas A. Tomsick, MD, Rüdiger von Kummer, MD, Jeffrey L. Saver, MD, Michael P. Marks, MD, Shyam Prabhakaran, MD, David F. Kallmes, MD, Brian-Fred M. Fitzsimmons, MD, J. Mocco, MD, Joanna M. Wardlaw, MD, Stanley L. Barnwell, MD, Tudor G. Jovin, MD, Italo Linfante, MD, Adnan H. Siddiqui, MD, Michael J. Alexander, MD, Joshua A. Hirsch, MD, Max Wintermark, MD, Gregory Albers, MD, Henry H. Woo, MD, Donald V. Heck, MD, Michael Lev, MD, Richard Aviv, MD, Werner Hacke, MD, Steven Warach, MD, Joseph Broderick, MD, Colin P. Derdeyn, MD, Anthony Furlan, MD, Raul G. Nogueira, MD, Dileep R. Yavagal, MD, Mayank Goyal, MD, Andrew M. Demchuk, MD, Martin Bendszus, MD and David S. Liebeskind, MDfor the Cerebral Angiographic Revascularization Grading (CARG) Collaborators, STIR Revascularization working group, and STIR Thrombolysis in Cerebral Infarction (TICI) Task Force Osama O. ZaidatOsama O. Zaidat From the Department of Neurology, Medical College of Wisconsin, Milwaukee, WI (O.O.Z., B.-F.M.F.); Department of Radiology, Harvard Medical Center, Boston, MA (A.J.Y., J.A.H., M.L.); Department of Neurology (P.K., J.B.), Department of Radiology (T.A.T.), University of Cincinnati, Cincinnati, OH; Department of Radiology, Technical University Dresden, Dresden, Germany (R.v.K.); Department of Neurology, University of Los Angeles, Los Angeles, CA (J.L.S., D.S.L.); Department of Radiology (M.P.M.), Department of Neurology (G.A.), Stanford University, San Francisco, CA; Department of Neurology, Northwestern University, Chicago, IL (S.P.); Department of Radiology, Mayo Clinic, Rochester, MN (D.F.K.); Department of Neurosurgery, Vanderbilt University, Nashville, TN (J.M.); Department of Clinical Neurosciences, University of Edinburgh, Edinburgh, United Kingdom (J.M.W.); Department of Neurosurgery, Oregon State University, Portland, OR (S.L.B.); Department of Neurology, University of Pittsburgh, Pittsburgh, PA (T.G.J.); Baptist Vascular Center, Miami, FL (I.L.); Department of Neurosurgery, University of Buffalo, Buffalo, NY (A.H.S); Department of Neurosurgery, Mount Sinai Medical Center, Los Angeles, CA (M.J.A.); Department of Radiology, University of Virginia, Charlottesville, VA (M.W.); Department Neurosurgery, Stony Brook University, East Setauket, NY (H.H.W.); Department of Radiology, Forsyth Medical Center, Kernersville, NC (D.V.H.); Department of Medical Imaging, University of Toronto, Toronto, ON, Canada (R.A.); Department of Neurology (W.H.), Department of Neuroradiology (M.B.), University of Heidelberg, Heidelberg, Germany; Department of Neurology, University Medical Center, Brackenbridge, Bethesda, MD (S.W.); Department of Radiology, Washington University, St Louis, MO (C.P.D.); Department of Neurology, Case Western University, Cleveland, OH (A.F.); Department of Neurology, Emory University, Atlanta, GA (R.G.N.); Department of Neurology, Miami University, Miami, FL (D.R.Y.); and Department of Radiology (M.G.), Department of Neurology (A.M.D.), University of Calgary, Calgary, AB, Canada. Search for more papers by this author , Albert J. YooAlbert J. Yoo From the Department of Neurology, Medical College of Wisconsin, Milwaukee, WI (O.O.Z., B.-F.M.F.); Department of Radiology, Harvard Medical Center, Boston, MA (A.J.Y., J.A.H., M.L.); Department of Neurology (P.K., J.B.), Department of Radiology (T.A.T.), University of Cincinnati, Cincinnati, OH; Department of Radiology, Technical University Dresden, Dresden, Germany (R.v.K.); Department of Neurology, University of Los Angeles, Los Angeles, CA (J.L.S., D.S.L.); Department of Radiology (M.P.M.), Department of Neurology (G.A.), Stanford University, San Francisco, CA; Department of Neurology, Northwestern University, Chicago, IL (S.P.); Department of Radiology, Mayo Clinic, Rochester, MN (D.F.K.); Department of Neurosurgery, Vanderbilt University, Nashville, TN (J.M.); Department of Clinical Neurosciences, University of Edinburgh, Edinburgh, United Kingdom (J.M.W.); Department of Neurosurgery, Oregon State University, Portland, OR (S.L.B.); Department of Neurology, University of Pittsburgh, Pittsburgh, PA (T.G.J.); Baptist Vascular Center, Miami, FL (I.L.); Department of Neurosurgery, University of Buffalo, Buffalo, NY (A.H.S); Department of Neurosurgery, Mount Sinai Medical Center, Los Angeles, CA (M.J.A.); Department of Radiology, University of Virginia, Charlottesville, VA (M.W.); Department Neurosurgery, Stony Brook University, East Setauket, NY (H.H.W.); Department of Radiology, Forsyth Medical Center, Kernersville, NC (D.V.H.); Department of Medical Imaging, University of Toronto, Toronto, ON, Canada (R.A.); Department of Neurology (W.H.), Department of Neuroradiology (M.B.), University of Heidelberg, Heidelberg, Germany; Department of Neurology, University Medical Center, Brackenbridge, Bethesda, MD (S.W.); Department of Radiology, Washington University, St Louis, MO (C.P.D.); Department of Neurology, Case Western University, Cleveland, OH (A.F.); Department of Neurology, Emory University, Atlanta, GA (R.G.N.); Department of Neurology, Miami University, Miami, FL (D.R.Y.); and Department of Radiology (M.G.), Department of Neurology (A.M.D.), University of Calgary, Calgary, AB, Canada. Search for more papers by this author , Pooja KhatriPooja Khatri From the Department of Neurology, Medical College of Wisconsin, Milwaukee, WI (O.O.Z., B.-F.M.F.); Department of Radiology, Harvard Medical Center, Boston, MA (A.J.Y., J.A.H., M.L.); Department of Neurology (P.K., J.B.), Department of Radiology (T.A.T.), University of Cincinnati, Cincinnati, OH; Department of Radiology, Technical University Dresden, Dresden, Germany (R.v.K.); Department of Neurology, University of Los Angeles, Los Angeles, CA (J.L.S., D.S.L.); Department of Radiology (M.P.M.), Department of Neurology (G.A.), Stanford University, San Francisco, CA; Department of Neurology, Northwestern University, Chicago, IL (S.P.); Department of Radiology, Mayo Clinic, Rochester, MN (D.F.K.); Department of Neurosurgery, Vanderbilt University, Nashville, TN (J.M.); Department of Clinical Neurosciences, University of Edinburgh, Edinburgh, United Kingdom (J.M.W.); Department of Neurosurgery, Oregon State University, Portland, OR (S.L.B.); Department of Neurology, University of Pittsburgh, Pittsburgh, PA (T.G.J.); Baptist Vascular Center, Miami, FL (I.L.); Department of Neurosurgery, University of Buffalo, Buffalo, NY (A.H.S); Department of Neurosurgery, Mount Sinai Medical Center, Los Angeles, CA (M.J.A.); Department of Radiology, University of Virginia, Charlottesville, VA (M.W.); Department Neurosurgery, Stony Brook University, East Setauket, NY (H.H.W.); Department of Radiology, Forsyth Medical Center, Kernersville, NC (D.V.H.); Department of Medical Imaging, University of Toronto, Toronto, ON, Canada (R.A.); Department of Neurology (W.H.), Department of Neuroradiology (M.B.), University of Heidelberg, Heidelberg, Germany; Department of Neurology, University Medical Center, Brackenbridge, Bethesda, MD (S.W.); Department of Radiology, Washington University, St Louis, MO (C.P.D.); Department of Neurology, Case Western University, Cleveland, OH (A.F.); Department of Neurology, Emory University, Atlanta, GA (R.G.N.); Department of Neurology, Miami University, Miami, FL (D.R.Y.); and Department of Radiology (M.G.), Department of Neurology (A.M.D.), University of Calgary, Calgary, AB, Canada. Search for more papers by this author , Thomas A. TomsickThomas A. Tomsick From the Department of Neurology, Medical College of Wisconsin, Milwaukee, WI (O.O.Z., B.-F.M.F.); Department of Radiology, Harvard Medical Center, Boston, MA (A.J.Y., J.A.H., M.L.); Department of Neurology (P.K., J.B.), Department of Radiology (T.A.T.), University of Cincinnati, Cincinnati, OH; Department of Radiology, Technical University Dresden, Dresden, Germany (R.v.K.); Department of Neurology, University of Los Angeles, Los Angeles, CA (J.L.S., D.S.L.); Department of Radiology (M.P.M.), Department of Neurology (G.A.), Stanford University, San Francisco, CA; Department of Neurology, Northwestern University, Chicago, IL (S.P.); Department of Radiology, Mayo Clinic, Rochester, MN (D.F.K.); Department of Neurosurgery, Vanderbilt University, Nashville, TN (J.M.); Department of Clinical Neurosciences, University of Edinburgh, Edinburgh, United Kingdom (J.M.W.); Department of Neurosurgery, Oregon State University, Portland, OR (S.L.B.); Department of Neurology, University of Pittsburgh, Pittsburgh, PA (T.G.J.); Baptist Vascular Center, Miami, FL (I.L.); Department of Neurosurgery, University of Buffalo, Buffalo, NY (A.H.S); Department of Neurosurgery, Mount Sinai Medical Center, Los Angeles, CA (M.J.A.); Department of Radiology, University of Virginia, Charlottesville, VA (M.W.); Department Neurosurgery, Stony Brook University, East Setauket, NY (H.H.W.); Department of Radiology, Forsyth Medical Center, Kernersville, NC (D.V.H.); Department of Medical Imaging, University of Toronto, Toronto, ON, Canada (R.A.); Department of Neurology (W.H.), Department of Neuroradiology (M.B.), University of Heidelberg, Heidelberg, Germany; Department of Neurology, University Medical Center, Brackenbridge, Bethesda, MD (S.W.); Department of Radiology, Washington University, St Louis, MO (C.P.D.); Department of Neurology, Case Western University, Cleveland, OH (A.F.); Department of Neurology, Emory University, Atlanta, GA (R.G.N.); Department of Neurology, Miami University, Miami, FL (D.R.Y.); and Department of Radiology (M.G.), Department of Neurology (A.M.D.), University of Calgary, Calgary, AB, Canada. Search for more papers by this author , Rüdiger von KummerRüdiger von Kummer From the Department of Neurology, Medical College of Wisconsin, Milwaukee, WI (O.O.Z., B.-F.M.F.); Department of Radiology, Harvard Medical Center, Boston, MA (A.J.Y., J.A.H., M.L.); Department of Neurology (P.K., J.B.), Department of Radiology (T.A.T.), University of Cincinnati, Cincinnati, OH; Department of Radiology, Technical University Dresden, Dresden, Germany (R.v.K.); Department of Neurology, University of Los Angeles, Los Angeles, CA (J.L.S., D.S.L.); Department of Radiology (M.P.M.), Department of Neurology (G.A.), Stanford University, San Francisco, CA; Department of Neurology, Northwestern University, Chicago, IL (S.P.); Department of Radiology, Mayo Clinic, Rochester, MN (D.F.K.); Department of Neurosurgery, Vanderbilt University, Nashville, TN (J.M.); Department of Clinical Neurosciences, University of Edinburgh, Edinburgh, United Kingdom (J.M.W.); Department of Neurosurgery, Oregon State University, Portland, OR (S.L.B.); Department of Neurology, University of Pittsburgh, Pittsburgh, PA (T.G.J.); Baptist Vascular Center, Miami, FL (I.L.); Department of Neurosurgery, University of Buffalo, Buffalo, NY (A.H.S); Department of Neurosurgery, Mount Sinai Medical Center, Los Angeles, CA (M.J.A.); Department of Radiology, University of Virginia, Charlottesville, VA (M.W.); Department Neurosurgery, Stony Brook University, East Setauket, NY (H.H.W.); Department of Radiology, Forsyth Medical Center, Kernersville, NC (D.V.H.); Department of Medical Imaging, University of Toronto, Toronto, ON, Canada (R.A.); Department of Neurology (W.H.), Department of Neuroradiology (M.B.), University of Heidelberg, Heidelberg, Germany; Department of Neurology, University Medical Center, Brackenbridge, Bethesda, MD (S.W.); Department of Radiology, Washington University, St Louis, MO (C.P.D.); Department of Neurology, Case Western University, Cleveland, OH (A.F.); Department of Neurology, Emory University, Atlanta, GA (R.G.N.); Department of Neurology, Miami University, Miami, FL (D.R.Y.); and Department of Radiology (M.G.), Department of Neurology (A.M.D.), University of Calgary, Calgary, AB, Canada. Search for more papers by this author , Jeffrey L. SaverJeffrey L. Saver From the Department of Neurology, Medical College of Wisconsin, Milwaukee, WI (O.O.Z., B.-F.M.F.); Department of Radiology, Harvard Medical Center, Boston, MA (A.J.Y., J.A.H., M.L.); Department of Neurology (P.K., J.B.), Department of Radiology (T.A.T.), University of Cincinnati, Cincinnati, OH; Department of Radiology, Technical University Dresden, Dresden, Germany (R.v.K.); Department of Neurology, University of Los Angeles, Los Angeles, CA (J.L.S., D.S.L.); Department of Radiology (M.P.M.), Department of Neurology (G.A.), Stanford University, San Francisco, CA; Department of Neurology, Northwestern University, Chicago, IL (S.P.); Department of Radiology, Mayo Clinic, Rochester, MN (D.F.K.); Department of Neurosurgery, Vanderbilt University, Nashville, TN (J.M.); Department of Clinical Neurosciences, University of Edinburgh, Edinburgh, United Kingdom (J.M.W.); Department of Neurosurgery, Oregon State University, Portland, OR (S.L.B.); Department of Neurology, University of Pittsburgh, Pittsburgh, PA (T.G.J.); Baptist Vascular Center, Miami, FL (I.L.); Department of Neurosurgery, University of Buffalo, Buffalo, NY (A.H.S); Department of Neurosurgery, Mount Sinai Medical Center, Los Angeles, CA (M.J.A.); Department of Radiology, University of Virginia, Charlottesville, VA (M.W.); Department Neurosurgery, Stony Brook University, East Setauket, NY (H.H.W.); Department of Radiology, Forsyth Medical Center, Kernersville, NC (D.V.H.); Department of Medical Imaging, University of Toronto, Toronto, ON, Canada (R.A.); Department of Neurology (W.H.), Department of Neuroradiology (M.B.), University of Heidelberg, Heidelberg, Germany; Department of Neurology, University Medical Center, Brackenbridge, Bethesda, MD (S.W.); Department of Radiology, Washington University, St Louis, MO (C.P.D.); Department of Neurology, Case Western University, Cleveland, OH (A.F.); Department of Neurology, Emory University, Atlanta, GA (R.G.N.); Department of Neurology, Miami University, Miami, FL (D.R.Y.); and Department of Radiology (M.G.), Department of Neurology (A.M.D.), University of Calgary, Calgary, AB, Canada. Search for more papers by this author , Michael P. MarksMichael P. Marks From the Department of Neurology, Medical College of Wisconsin, Milwaukee, WI (O.O.Z., B.-F.M.F.); Department of Radiology, Harvard Medical Center, Boston, MA (A.J.Y., J.A.H., M.L.); Department of Neurology (P.K., J.B.), Department of Radiology (T.A.T.), University of Cincinnati, Cincinnati, OH; Department of Radiology, Technical University Dresden, Dresden, Germany (R.v.K.); Department of Neurology, University of Los Angeles, Los Angeles, CA (J.L.S., D.S.L.); Department of Radiology (M.P.M.), Department of Neurology (G.A.), Stanford University, San Francisco, CA; Department of Neurology, Northwestern University, Chicago, IL (S.P.); Department of Radiology, Mayo Clinic, Rochester, MN (D.F.K.); Department of Neurosurgery, Vanderbilt University, Nashville, TN (J.M.); Department of Clinical Neurosciences, University of Edinburgh, Edinburgh, United Kingdom (J.M.W.); Department of Neurosurgery, Oregon State University, Portland, OR (S.L.B.); Department of Neurology, University of Pittsburgh, Pittsburgh, PA (T.G.J.); Baptist Vascular Center, Miami, FL (I.L.); Department of Neurosurgery, University of Buffalo, Buffalo, NY (A.H.S); Department of Neurosurgery, Mount Sinai Medical Center, Los Angeles, CA (M.J.A.); Department of Radiology, University of Virginia, Charlottesville, VA (M.W.); Department Neurosurgery, Stony Brook University, East Setauket, NY (H.H.W.); Department of Radiology, Forsyth Medical Center, Kernersville, NC (D.V.H.); Department of Medical Imaging, University of Toronto, Toronto, ON, Canada (R.A.); Department of Neurology (W.H.), Department of Neuroradiology (M.B.), University of Heidelberg, Heidelberg, Germany; Department of Neurology, University Medical Center, Brackenbridge, Bethesda, MD (S.W.); Department of Radiology, Washington University, St Louis, MO (C.P.D.); Department of Neurology, Case Western University, Cleveland, OH (A.F.); Department of Neurology, Emory University, Atlanta, GA (R.G.N.); Department of Neurology, Miami University, Miami, FL (D.R.Y.); and Department of Radiology (M.G.), Department of Neurology (A.M.D.), University of Calgary, Calgary, AB, Canada. Search for more papers by this author , Shyam PrabhakaranShyam Prabhakaran From the Department of Neurology, Medical College of Wisconsin, Milwaukee, WI (O.O.Z., B.-F.M.F.); Department of Radiology, Harvard Medical Center, Boston, MA (A.J.Y., J.A.H., M.L.); Department of Neurology (P.K., J.B.), Department of Radiology (T.A.T.), University of Cincinnati, Cincinnati, OH; Department of Radiology, Technical University Dresden, Dresden, Germany (R.v.K.); Department of Neurology, University of Los Angeles, Los Angeles, CA (J.L.S., D.S.L.); Department of Radiology (M.P.M.), Department of Neurology (G.A.), Stanford University, San Francisco, CA; Department of Neurology, Northwestern University, Chicago, IL (S.P.); Department of Radiology, Mayo Clinic, Rochester, MN (D.F.K.); Department of Neurosurgery, Vanderbilt University, Nashville, TN (J.M.); Department of Clinical Neurosciences, University of Edinburgh, Edinburgh, United Kingdom (J.M.W.); Department of Neurosurgery, Oregon State University, Portland, OR (S.L.B.); Department of Neurology, University of Pittsburgh, Pittsburgh, PA (T.G.J.); Baptist Vascular Center, Miami, FL (I.L.); Department of Neurosurgery, University of Buffalo, Buffalo, NY (A.H.S); Department of Neurosurgery, Mount Sinai Medical Center, Los Angeles, CA (M.J.A.); Department of Radiology, University of Virginia, Charlottesville, VA (M.W.); Department Neurosurgery, Stony Brook University, East Setauket, NY (H.H.W.); Department of Radiology, Forsyth Medical Center, Kernersville, NC (D.V.H.); Department of Medical Imaging, University of Toronto, Toronto, ON, Canada (R.A.); Department of Neurology (W.H.), Department of Neuroradiology (M.B.), University of Heidelberg, Heidelberg, Germany; Department of Neurology, University Medical Center, Brackenbridge, Bethesda, MD (S.W.); Department of Radiology, Washington University, St Louis, MO (C.P.D.); Department of Neurology, Case Western University, Cleveland, OH (A.F.); Department of Neurology, Emory University, Atlanta, GA (R.G.N.); Department of Neurology, Miami University, Miami, FL (D.R.Y.); and Department of Radiology (M.G.), Department of Neurology (A.M.D.), University of Calgary, Calgary, AB, Canada. Search for more papers by this author , David F. KallmesDavid F. Kallmes From the Department of Neurology, Medical College of Wisconsin, Milwaukee, WI (O.O.Z., B.-F.M.F.); Department of Radiology, Harvard Medical Center, Boston, MA (A.J.Y., J.A.H., M.L.); Department of Neurology (P.K., J.B.), Department of Radiology (T.A.T.), University of Cincinnati, Cincinnati, OH; Department of Radiology, Technical University Dresden, Dresden, Germany (R.v.K.); Department of Neurology, University of Los Angeles, Los Angeles, CA (J.L.S., D.S.L.); Department of Radiology (M.P.M.), Department of Neurology (G.A.), Stanford University, San Francisco, CA; Department of Neurology, Northwestern University, Chicago, IL (S.P.); Department of Radiology, Mayo Clinic, Rochester, MN (D.F.K.); Department of Neurosurgery, Vanderbilt University, Nashville, TN (J.M.); Department of Clinical Neurosciences, University of Edinburgh, Edinburgh, United Kingdom (J.M.W.); Department of Neurosurgery, Oregon State University, Portland, OR (S.L.B.); Department of Neurology, University of Pittsburgh, Pittsburgh, PA (T.G.J.); Baptist Vascular Center, Miami, FL (I.L.); Department of Neurosurgery, University of Buffalo, Buffalo, NY (A.H.S); Department of Neurosurgery, Mount Sinai Medical Center, Los Angeles, CA (M.J.A.); Department of Radiology, University of Virginia, Charlottesville, VA (M.W.); Department Neurosurgery, Stony Brook University, East Setauket, NY (H.H.W.); Department of Radiology, Forsyth Medical Center, Kernersville, NC (D.V.H.); Department of Medical Imaging, University of Toronto, Toronto, ON, Canada (R.A.); Department of Neurology (W.H.), Department of Neuroradiology (M.B.), University of Heidelberg, Heidelberg, Germany; Department of Neurology, University Medical Center, Brackenbridge, Bethesda, MD (S.W.); Department of Radiology, Washington University, St Louis, MO (C.P.D.); Department of Neurology, Case Western University, Cleveland, OH (A.F.); Department of Neurology, Emory University, Atlanta, GA (R.G.N.); Department of Neurology, Miami University, Miami, FL (D.R.Y.); and Department of Radiology (M.G.), Department of Neurology (A.M.D.), University of Calgary, Calgary, AB, Canada. Search for more papers by this author , Brian-Fred M. FitzsimmonsBrian-Fred M. Fitzsimmons From the Department of Neurology, Medical College of Wisconsin, Milwaukee, WI (O.O.Z., B.-F.M.F.); Department of Radiology, Harvard Medical Center, Boston, MA (A.J.Y., J.A.H., M.L.); Department of Neurology (P.K., J.B.), Department of Radiology (T.A.T.), University of Cincinnati, Cincinnati, OH; Department of Radiology, Technical University Dresden, Dresden, Germany (R.v.K.); Department of Neurology, University of Los Angeles, Los Angeles, CA (J.L.S., D.S.L.); Department of Radiology (M.P.M.), Department of Neurology (G.A.), Stanford University, San Francisco, CA; Department of Neurology, Northwestern University, Chicago, IL (S.P.); Department of Radiology, Mayo Clinic, Rochester, MN (D.F.K.); Department of Neurosurgery, Vanderbilt University, Nashville, TN (J.M.); Department of Clinical Neurosciences, University of Edinburgh, Edinburgh, United Kingdom (J.M.W.); Department of Neurosurgery, Oregon State University, Portland, OR (S.L.B.); Department of Neurology, University of Pittsburgh, Pittsburgh, PA (T.G.J.); Baptist Vascular Center, Miami, FL (I.L.); Department of Neurosurgery, University of Buffalo, Buffalo, NY (A.H.S); Department of Neurosurgery, Mount Sinai Medical Center, Los Angeles, CA (M.J.A.); Department of Radiology, University of Virginia, Charlottesville, VA (M.W.); Department Neurosurgery, Stony Brook University, East Setauket, NY (H.H.W.); Department of Radiology, Forsyth Medical Center, Kernersville, NC (D.V.H.); Department of Medical Imaging, University of Toronto, Toronto, ON, Canada (R.A.); Department of Neurology (W.H.), Department of Neuroradiology (M.B.), University of Heidelberg, Heidelberg, Germany; Department of Neurology, University Medical Center, Brackenbridge, Bethesda, MD (S.W.); Department of Radiology, Washington University, St Louis, MO (C.P.D.); Department of Neurology, Case Western University, Cleveland, OH (A.F.); Department of Neurology, Emory University, Atlanta, GA (R.G.N.); Department of Neurology, Miami University, Miami, FL (D.R.Y.); and Department of Radiology (M.G.), Department of Neurology (A.M.D.), University of Calgary, Calgary, AB, Canada. Search for more papers by this author , J. MoccoJ. Mocco From the Department of Neurology, Medical College of Wisconsin, Milwaukee, WI (O.O.Z., B.-F.M.F.); Department of Radiology, Harvard Medical Center, Boston, MA (A.J.Y., J.A.H., M.L.); Department of Neurology (P.K., J.B.), Department of Radiology (T.A.T.), University of Cincinnati, Cincinnati, OH; Department of Radiology, Technical University Dresden, Dresden, Germany (R.v.K.); Department of Neurology, University of Los Angeles, Los Angeles, CA (J.L.S., D.S.L.); Department of Radiology (M.P.M.), Department of Neurology (G.A.), Stanford University, San Francisco, CA; Department of Neurology, Northwestern University, Chicago, IL (S.P.); Department of Radiology, Mayo Clinic, Rochester, MN (D.F.K.); Department of Neurosurgery, Vanderbilt University, Nashville, TN (J.M.); Department of Clinical Neurosciences, University of Edinburgh, Edinburgh, United Kingdom (J.M.W.); Department of Neurosurgery, Oregon State University, Portland, OR (S.L.B.); Department of Neurology, University of Pittsburgh, Pittsburgh, PA (T.G.J.); Baptist Vascular Center, Miami, FL (I.L.); Department of Neurosurgery, University of Buffalo, Buffalo, NY (A.H.S); Department of Neurosurgery, Mount Sinai Medical Center, Los Angeles, CA (M.J.A.); Department of Radiology, University of Virginia, Charlottesville, VA (M.W.); Department Neurosurgery, Stony Brook University, East Setauket, NY (H.H.W.); Department of Radiology, Forsyth Medical Center, Kernersville, NC (D.V.H.); Department of Medical Imaging, University of Toronto, Toronto, ON, Canada (R.A.); Department of Neurology (W.H.), Department of Neuroradiology (M.B.), University of Heidelberg, Heidelberg, Germany; Department of Neurology, University Medical Center, Brackenbridge, Bethesda, MD (S.W.); Department of Radiology, Washington University, St Louis, MO (C.P.D.); Department of Neurology, Case Western University, Cleveland, OH (A.F.); Department of Neurology, Emory University, Atlanta, GA (R.G.N.); Department of Neurology, Miami University, Miami, FL (D.R.Y.); and Department of Radiology (M.G.), Department of Neurology (A.M.D.), University of Calgary, Calgary, AB, Canada. Search for more papers by this author , Joanna M. WardlawJoanna M. Wardlaw From the Department of Neurology, Medical College of Wisconsin, Milwaukee, WI (O.O.Z., B.-F.M.F.); Department of Radiology, Harvard Medical Center, Boston, MA (A.J.Y., J.A.H., M.L.); Department of Neurology (P.K., J.B.), Department of Radiology (T.A.T.), University of Cincinnati, Cincinnati, OH; Department of Radiology, Technical University Dresden, Dresden, Germany (R.v.K.); Department of Neurology, University of Los Angeles, Los Angeles, CA (J.L.S., D.S.L.); Department of Radiology (M.P.M.), Department of Neurology (G.A.), Stanford University, San Francisco, CA; Department of Neurology, Northwestern University, Chicago, IL (S.P.); Department of Radiology, Mayo Clinic, Rochester, MN (D.F.K.); Department of Neurosurgery, Vanderbilt University, Nashville, TN (J.M.); Department of Clinical Neurosciences, University of Edinburgh, Edinburgh, United Kingdom (J.M.W.); Department of Neurosurgery, Oregon State University, Portland, OR (S.L.B.); Department of Neurology, University of Pittsburgh, Pittsburgh, PA (T.G.J.); Baptist Vascular Center, Miami, FL (I.L.); Department of Neurosurgery, University of Buffalo, Buffalo, NY (A.H.S); Department of Neurosurgery, Mount Sinai Medical Center, Los Angeles, CA (M.J.A.); Department of Radiology, University of Virginia, Charlottesville, VA (M.W.); Department Neurosurgery, Stony Brook University, East Setauket, NY (H.H.W.); Department of Radiology, Forsyth Medical Center, Kernersville, NC (D.V.H.); Department of Medical Imaging, University of Toronto, Toronto, ON, Canada (R.A.); Department of Neurology (W.H.), Department of Neuroradiology (M.B.), University of Heidelberg, Heidelberg, Germany; Department of Neurology, University Medical Center, Brackenbridge, Bethesda, MD (S.W.); Department of Radiology, Washington University, St Louis, MO (C.P.D.); Department of Neurology, Case Western University, Cleveland, OH (A.F.); Department of Neurology, Emory University, Atlanta, GA (R.G.N.); Department of Neurology, Miami University, Miami, FL (D.R.Y.); and Department of Radiology (M.G.), Department of Neurology (A.M.D.), University of Calgary, Calgary, AB, Canada. Search for more papers by this author , Stanley L. BarnwellStanley L. Barnwell From the Department of Neurology, Medical College of Wisconsin, Milwaukee, WI (O.O.Z., B.-F.M.F.); Department of Radiology, Harvard Medical Center, Boston, MA (A.J.Y., J.A.H., M.L.); Department of Neurology (P.K., J.B.), Department of Radiology (T.A.T.), University of Cincinnati, Cincinnati, OH; Department of Radiology, Technical University Dresden, Dresden, Germany (R.v.K.); Department of Neurology, University of Los Angeles, Los Angeles, CA (J.L.S., D.S.L.); Department of Radiology (M.P.M.), Department of Neurology (G.A.), Stanford University, San Francisco, CA; Department of Neurology, Northwestern University, Chicago, IL (S.P.); Department of Radiology, Mayo Clinic, Rochester, MN (D.F.K.); Department of Neurosurgery, Vanderbilt University, Nashville, TN (J.M.); Department of Clinical Neurosciences, University of Edinburgh, Edinburgh, United Kingdom (J.M.W.); Department of Neurosurgery, Oregon State University, Portland, OR (S.L.B.); Department of Neurology, University of Pittsburgh, Pittsburgh, PA (T.G.J.); Baptist Vascular Center, Miami, FL (I.L.); Department of Neurosurgery, University of Buffalo, Buffalo, NY (A.H.S); Department of Neurosurgery, Mount Sinai Medical Center, Los Angeles, CA (M.J.A.); Department of Radiology, University of Virginia, Charlottesville, VA (M.W.); Department Neurosurgery, Stony Brook University, East Setauket, NY (H.H.W.); Department of Radiology, Forsyth Medical Center, Kernersville, NC (D.V.H.); Department of Medical Imaging, University of Toronto, Toronto, ON, Canada (R.A.); Department of Neurology (W.H.), Department of Neuroradiology (M.B.), University of Heidelberg, Heidelberg, Germany; Department of Neurology, University Medical Center, Brackenbridge, Bethesda, MD (S.W.); Department of Radiology, Washington University, St Louis, MO (C.P.D.); Department of Neurology, Case Western University, Cleveland, OH (A.F.); Department of Neurology, Emory University, Atlanta, GA (R.G.N.); Department of Neurology, Miami University, Miami, FL (D.R.Y.); and Department of Radiology (M.G.), Department of Neurology (A.M.D.), University of Calgary, Calgary, AB, Canada. 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