Imaging in Acute Stroke: CT and MRI
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Questions and Answers

Which imaging modality is indicated for acute stroke if there is suspicion of another etiology, such as tumor or AVM?

  • MRI with T1-weighted imaging (T1WI)
  • CT without IV contrast
  • CT with IV contrast (correct)
  • MRI with diffusion-weighted imaging (DWI)

What is the primary imaging modality recommended for initial assessment of acute stroke?

  • MRI with FLAIR imaging
  • CT with IV contrast
  • MRI with T2-weighted imaging (T2WI)
  • CT without IV contrast (correct)

Which MRI sequence is most sensitive for detecting acute stroke?

  • T2-weighted imaging (T2WI)
  • Diffusion-weighted imaging (DWI) (correct)
  • Fluid-attenuated inversion recovery (FLAIR)
  • T1-weighted imaging (T1WI)

Which condition can lead to false positives on Diffusion Weighted Imaging (DWI) for ischemic stroke?

<p>Multiple sclerosis (MS) (D)</p> Signup and view all the answers

When does the infarcted area appear abnormal on T2-weighted MRI imaging?

<p>The infarcted area remains bright forever (B)</p> Signup and view all the answers

In uncertain situations, when is it recommended to repeat the Diffusion Weighted Imaging (DWI) for ischemic stroke?

<p>After 2 weeks (C)</p> Signup and view all the answers

What is the most rapid and reliable imaging modality for the initial assessment of acute stroke?

<p>CT without IV contrast (D)</p> Signup and view all the answers

Which MRI sequence is most sensitive for detecting acute stroke?

<p>Diffusion weighted imaging (DWI) (D)</p> Signup and view all the answers

What type of signal does an infarcted area exhibit on T2-weighted imaging over time?

<p>It becomes progressively darker until it matches the signal of CSF (D)</p> Signup and view all the answers

Which imaging modality is indicated if there is suspicion of another etiology, such as tumor or AVM, in a patient with acute stroke?

<p>CT with IV contrast (C)</p> Signup and view all the answers

When is it recommended to repeat the Diffusion Weighted Imaging (DWI) for ischemic stroke in uncertain situations?

<p>After 2 weeks (B)</p> Signup and view all the answers

Which MRI sequence shows an abnormal area becoming bright within 30 minutes of onset of ischemia?

<p>Diffusion weighted imaging (DWI) (B)</p> Signup and view all the answers

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