PT - JOURNAL ARTICLE ED - American Society of Neuroradiology TI - Emergency Radiology. Imaging and Intervention AID - 10.3174/ajnr.A0882 DP - 2007 Dec 07 TA - American Journal of Neuroradiology 4099 - http://www.ajnr.org/content/early/2007/12/07/ajnr.A0882.short 4100 - http://www.ajnr.org/content/early/2007/12/07/ajnr.A0882.full