1. From the J. Philip Kistler Stroke Research Center (M.C.Z.Z., N.M., A.C., S.M.G., S.J.V.), Department of Neurology, Massachusetts General Hospital, Harvard Medical School, Boston; Center for Imaging Sciences and Medical Physics (M.C.Z.Z.), Department of Medical Imaging, Hematology and Clinical Oncology, Ribeirão Preto Medical School, University of São Paulo, Brazil; Rush Alzheimer's Disease Center (J.A.S., K.A.), Rush University Medical Center; and Department of Biomedical Engineering (K.A.),...