MRI Findings in Persistent Occlusion
In patients with large artery occlusion who do not experience recanalization, the DWI lesion typically expands into much or all of the persistent Tmax >6 seconds perfusion lesion.[8–10] However, late window patients, who are selected based on having salvageable tissue, typically have good collaterals, and the final infarct volume may not be obtained for several days.[13] Therefore, a follow-up scan at 24 hours will often underestimate infarct volume in patients who have a persistent occlusion.
Stroke. 2018;49(9):2256-2260. © 2018 American Heart Association, Inc.
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