What is the role of MRA in the workup of acute stroke?

Updated: Dec 09, 2020
  • Author: Souvik Sen, MD, MPH, MS, FAHA; Chief Editor: Helmi L Lutsep, MD  more...
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Magnetic resonance angiography (MRA) is very sensitive to flow and is based on the difference in signal between moving blood and stationary brain tissue; angiographic-like images of the cervicocranial vasculature are produced.

MRA images are a useful tool in identifying dissections, in that the true and false lumen of the involved artery can be observed on the source images. Following is a brief description of the 2 basic techniques.

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