About the Authors

R. Gilberto González

rggonzalez@partners.org

Affiliation Department of Radiology, Massachusetts General Hospital and Harvard Medical School, Boston, Massachusetts, United States of America

Michael H. Lev

Affiliation Department of Radiology, Massachusetts General Hospital and Harvard Medical School, Boston, Massachusetts, United States of America

Gregory V. Goldmacher

Affiliation Department of Radiology, Massachusetts General Hospital and Harvard Medical School, Boston, Massachusetts, United States of America

Wade S. Smith

Affiliation Department of Neurology, University of California San Francisco, San Francisco, California, United States of America

Seyedmehdi Payabvash

Affiliation Department of Radiology, Massachusetts General Hospital and Harvard Medical School, Boston, Massachusetts, United States of America

Gordon J. Harris

Affiliation Department of Radiology, Massachusetts General Hospital and Harvard Medical School, Boston, Massachusetts, United States of America

Elkan F. Halpern

Affiliations Department of Radiology, Massachusetts General Hospital and Harvard Medical School, Boston, Massachusetts, United States of America, Department of Radiology and Institute for Technology Assessment, Massachusetts General Hospital and Harvard Medical School, Boston, Massachusetts, United States of America

Walter J. Koroshetz

Affiliation National Institute of Neurological Disorders and Stroke, Bethesda, Maryland, United States of America

Erica C. S. Camargo

Affiliation Department of Neurology, Massachusetts General Hospital and Harvard Medical School, Boston, Massachusetts, United States of America

William P. Dillon

Affiliation Department of Radiology, University of California San Francisco, San Francisco, California, United States of America

Karen L. Furie

Affiliation Department of Neurology, Massachusetts General Hospital and Harvard Medical School, Boston, Massachusetts, United States of America

Competing Interests

Michael H. Lev has read the journal′s policy and has the following conflicts: He receives research support from GE Healthcare, and is Consultant to Co-Axia, GE Healthcare, and Millennium Pharmaceuticals. Otherwise, the other authors have declared that no competing interests exist. This does not alter the authors′ adherence to all the PLoS ONE policies on sharing data and materials.

Author Contributions

Conceived and designed the experiments: RGG MHL WSS EFH WJK KLF. Performed the experiments: MHL WSS WJK KLF GJH ECC WPD KLF. Analyzed the data: RGG MHL GVG WSS SP EFH WJK ECC WPD KLF. Contributed reagents/materials/analysis tools: GJH EFH. Wrote the paper: RGG MHL GVG WSS SP GJH EFH WJK ECC WPD KLF.