1. Which of the following is responsible for the bright sign | Figure 1

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1. Which of the following is responsible for the bright signal in the left middle cerebral artery distribution on the diffusion-weighted image (part C)?
   A. Subacute hemorrhage
   B. Acute hemorrhage
   C. Vasogenic edema
   D. Cytotoxic edema

2. What is the purpose of the apparent diffusion coefficient map (part D)?
   A. Corrects for T2 blackout effect
   B. Corrects for T2 shine-through
   C. Increases sensitivity for blood products
   D. Identifies brain tissue that is ischemic but not yet infarcted

Question from Duke Review of MRI Physics: Case Review Series, 2nd edition, by Wells I. Mangrum. ISBN: 9780323530385. Copyright ©2019 Elsevier, Inc.

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