fig4
![Expanding the therapeutic window in acute ischemic stroke by advanced imaging](https://image.oaes.cc/d2e52e25-60bf-48f4-871e-993f7176f500/3913.fig.4.jpg)
Figure 4. Sample of a DWI-FLAIR mismatch case. The upper figure shows DWI positive but FLAIR negative, which can suppose that this case is within 3 to 4.5 h of onset. The lower case has both positive signals in DWI and FLAIR which can be assume that onset is beyond 4.5 h.