Which MRI findings are characteristic of the subacute phase (7-21 d) of acute stroke?

Updated: Dec 19, 2018
  • Author: Souvik Sen, MD, MPH, MS, FAHA; Chief Editor: Helmi L Lutsep, MD  more...
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Answer

Answer

In this phase, the edema resolves and the mass effect becomes less appreciated; however, the infarcted areas still appear as a hypointensity on T1-WI and as a hyperintensity on T2-WI.

In contrast-enhanced images, the arterial enhancement is usually resolved by this time, and the parenchymal enhancement typically persists throughout this phase. The cortical parenchymal enhancement is usually in a gyriform pattern, while the subcortical enhancement is usually a homogenous central pattern.


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