1Bahn MM,Oser AB,Cross DJ.CT and MRIof stroke[J].JMRI,1996,6:833.
2Patel MR,Siewert B,Warach S，et al.Diffusion and perfusion imaging techniques[J].MRIClin North Am,1995,3:425.
3Soren AG,Tievsky AV,Ostergaard L，et al.Contrast agents in functional MR imaging[J].JMRI,1997,7:47.
4Fisher M,Prichard JW,Warach S.New magnetic resonance techniques for acute ischemicstroke[J].JAMA,1995,274:908.
5Maeda M,Maley JF,Crosby DL，et al.Application of contrast angents in theevaluation of stroke:conventional MR and echo-planar MR imaging[J].JMRI,1997,7:23.
7Siewert B,Patel MP,Warach S.Stroke and ischemia[J].MRI Clin NorthAmer,1995,3:529
8Rempp KA,Brix G,Wenz F，et al.Quantification of regional cerebral blood flow andvolume with dynamic susceptibility contrast-enhanced MR imaging[J].Radiology,1994,193:637.
9Edelman RR,Siewert B,Darby DG，et al.Qualitative mapping of cerebral blood flowand function localization with echo-planar MR imaging and signal targeting withalternating radiofrequency[J].Radiology,1994,192:513.
