[1] Wayne State Univ, MR Res Facil, Dept Radiol & Biomed Engn, Detroit, MI 48201 USA
[2] Dartmouth Hitchcock Med Ctr, Dept Pediat Neurosurg, Lebanon, NH 03766 USA
[3] San Francisco Gen Hosp, Dept Radiol, Brain & Spinal Cord Injury Ctr, San Francisco, CA 94110 USA
[4] Walter Reed Army Med Ctr, Dept Radiol, Washington, DC 20307 USA
[5] Univ Calif San Francisco, Dept Radiol, San Francisco, CA 94143 USA
[6] Univ Calif San Francisco, Dept Bioengn, San Francisco, CA 94143 USA
[7] Washington Univ, Dept Neurol, St Louis, MO USA
[8] Natl Naval Med Ctr, Bethesda, MD USA
[9] Naval Med Ctr San Diego, Dept Radiol, San Diego, CA USA
[10] Univ Utah, Hlth Sci Ctr, Div Phys Med & Rehabil, Salt Lake City, UT USA
[11] Hefner VA Med Ctr, Salisbury, NC USA
[12] NINDS, Stroke Diagnost & Therapeut Sect, Stroke Branch, Bethesda, MD 20892 USA
[13] Uniformed Serv Univ Hlth Sci, Dept Radiol & Radiol Sci, Bethesda, MD USA
[14] Univ Penn, Dept Neurosurg, Ctr Brain Injury & Repair, Philadelphia, PA 19104 USA