RT Journal Article SR Electronic T1 031 Usefulness of CT perfusion, CT angiography and non-enhanced CT in the evaluation of acute ischemic strokes patients with unknown onset time JF Journal of NeuroInterventional Surgery JO J NeuroIntervent Surg FD BMJ Publishing Group Ltd. SP 85 OP 86 DO 10.1136/jnis.2009.001016e VO 1 IS 1 A1 Pinedo, D A1 Akhtar, N A1 Martin, C A1 Hameed, K YR 2009 UL http://jnis.bmj.com/content/1/1/85.2.abstract AB