Diffusion-weighted MR imaging: diagnostic accurancy in patients imaged within 6 hours of stroke symptom onset. - Gonzalez,R.G.; Schaefer,P.W.; Buonanno,F.S.; Schwamm,L.H.; Buddzik,R.F.; Rordorf,G.; Sorensen,A.G.; Koroshetz,W.J. (Radiology, 1999)