TY - JOUR T1 - MR Perfusion Imaging of Hyperacute Stroke JF - American Journal of Neuroradiology JO - Am. J. Neuroradiol. SP - 806 LP - 806 VL - 22 IS - 5 AU - John A. Detre Y1 - 2001/05/01 UR - http://www.ajnr.org/content/22/5/806.abstract N2 - ER -