Practice Guidelines for the Use of Imaging in Transient Ischemic Attacks and Acute Stroke
Stroke 28:1480-1497, Culebras,A.,et al, 1997
Vascular Neoplasms and Malformations, Ischemia, and Hemorrhage Affecting the Spinal Cord:MR Imaging Findings
AJR 162:685-692, Friedman,D.P.,et al, 1994