VOLUME 12 / NUMBER 2 APRIL 2002 EDITOR-IN-CHIEF Lawrence R. Wechsler, MD University of Pittsburgh Pittsburgh, Pennsylvania CO-EDITOR Viken L. Babikian, MD Boston University School of Medicine Boston, Massachusetts EUROPEAN EDITOR Jean-Claude Baron, MD University of Cambridge Cambridge, England ASSOCIATE EDITORS Walter J. Koroshetz, MD Harvard University Boston, Massachusetts Edward Feldmann, MD Brown University Providence, Rhode Island MANAGING EDITOR Nancy D. Clark Pittsburgh, Pennsylvania email: ndclark1@attbi.com FOUNDING EDITOR-IN-CHIEF Leon D. Prockop, MD University of South Florida Tampa, Florida ASSISTANT EDITORS Neuroimaging CPC Amyn M. Rojiani, MD, PhD University of South Florida Tampa, Florida Advances in Technology Ronald S. Tikofsky, PhD College of Physicians and Surgeons of Columbia University New York, New York Book Reviews Maria-Carmen Wilson, MD University of South Florida Tampa, Florida PUBLISHER Sage Science Press EDITORIAL BOARD Heriberto Acosta, MD, San Juan, Puerto Rico Andrei V. Alexandrov, MD, Houston, Texas Rohit Bakshi, MD, Buffalo, New York Shi-yao Bao, MD, Suzhou, China Jon Brillman, MD, Pittsburgh, Pennsylvania Louis R. Caplan, MD, Boston, Massachusetts John Chawluk, MD, Pottsville, Pennsylvania Antonio Culebras, MD, Syracuse, New York Jacques Darcourt, MD, PhD, Nice, France Stephen Davis, MD, FRACP, Melbourne, Australia John A. Detre, MD, Philadelphia, Pennsylvania Geoffrey Donnan, MD, West Heidelberg, Australia Richard S. J. Frackowiak, MD, London, United Kingdom Hidenao Fukuyama, Kyoto, Japan Anthony J. Furlan, MD, Cleveland, Ohio Cole A. Giller, MD, Dallas, Texas Camilo Gomez, MD, Birmingham, Alabama Steven Goldstein, MD, Pittsburgh, Pennsylvania Jack O.Greenberg, MD, Philadelphia, Pennsylvania Balazs Gulyas, MD, PhD, Stockholm, Sweden Karl Herholz, Cologne, Germany Randall T.Higashida, MD, San Francisco, California Alan Hill, MD, PhD, Vancouver, British Columbia William Jagust, MD, Davis, California Charles Jungreis, MD, Pittsburgh, Pennsylvania Peter R. Kinkel, MD, Buffalo, New York Robert A. Koenigsberg, DO, Broomall, Pennsylvania Klaus L. Leenders, MD, Groningen, the Netherlands Gianluigi Lenzi, MD, Rome, Italy Paul Maertens, MD, Mobile, Alabama Claude Marsault, MD, Paris, France Joseph Masdeu, MD, PhD, New York, New York Paul Matthews, MD, Oxford, United Kingdom Michael A. Meyer, MD, Buffalo, New York Robert S. Miletich, MD, PhD, Buffalo, New York Daniela Perani, MD, Milan, Italy John Pickard, MD, Cambridge, United Kingdom Joseph F.Polak, MD, MPH, Boston, Massachusetts Eric Salmon, MD, Liège, Belgium Rudiger Seitz, MD, Duesseldorf, Germany Michael A. Sloan, MD, Chicago, Illinois Charles H. Tegeler, MD, Winston-Salem, North Carolina Rudiger von Kummer, MD, Dresden, Germany Joanna Wardlaw, MD, Edinburgh, United Kingdom Jesse Weinberger, MD, New York, New York Leo Wolansky, MD, New Providence, New Jersey Lawrence K. S. Wong, MD, Hong Kong, China Jay Yadav, MD, Atlanta, Georgia Howard Yonas, MD, Pittsburgh, Pennsylvania Journal of Official Journal of the American Society of Neuroimaging Official Journal of The Neurosonology Research Group of The World Federation of Neurology