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Estimate age of stroke - MRI - Revision history
2024-03-29T14:33:57Z
Revision history for this page on the wiki
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Radadmin: Created page with "== Age of stroke on MR (from Diagnostic Neuroradiology by Osborn) == === Immediate === * Absence of normal flow void * Intravascular contrast enhancement * Diffusion restrict..."
2018-10-31T19:25:01Z
<p>Created page with "== Age of stroke on MR (from Diagnostic Neuroradiology by Osborn) == === Immediate === * Absence of normal flow void * Intravascular contrast enhancement * Diffusion restrict..."</p>
<p><b>New page</b></p><div>== Age of stroke on MR (from Diagnostic Neuroradiology by Osborn) ==<br />
<br />
=== Immediate ===<br />
* Absence of normal flow void<br />
* Intravascular contrast enhancement<br />
* Diffusion restriction (high DWI/low ADC)<br />
* Perfusion alteration<br />
* High DWI and normal T2/FLAIR is 62% sensitive and 78% specific for stroke <4.5hours old [Lancet Neurology 10/5/2011]<br />
<br />
=== <12h ===<br />
* Sulcal effacement<br />
* Gyral edema<br />
* Loss of gray-white<br />
<br />
=== 12-24h ===<br />
* Hyperintensity on T2/FLAIR<br />
* Meningeal enhancement adjacent to infarct<br />
* Mass effect<br />
<br />
=== 1-3 days ===<br />
* Intravascular, meningeal enhancement starts to decrease<br />
* Early parenchymal enhancement<br />
* Striking signal abnormality on T1/T2<br />
* Hemorrhagic transformation may be evident<br />
<br />
=== 4-7 days ===<br />
* Striking parenchymal enhancement<br />
* Hemorrhage in 25%<br />
* Mass effect diminishing<br />
* Intravascular, meningeal enhancement disappears<br />
<br />
=== 1-8 weeks ===<br />
* Contrast enhancement often persists<br />
* Restricted diffusion ends at ~10-14 days<br />
* Mass effect resolves<br />
* Decrease in abnormal T2 signal sometimes<br />
* Hemorrhagic changes evolve<br />
<br />
=== Months/Years ===<br />
* Encephalomalacic changes, volume loss<br />
* Hemosiderin staining if prior hemorrhage</div>
Radadmin