ABR Neuroradiology Practice Questions - ABR Neuroradiology Subspecialty Certificate Of Added Qualification (CAQ) Exam

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A patient presents with stroke symptoms at an unknown time of onset. DWI shows restricted diffusion but FLAIR shows no corresponding signal change. What does this DWI-FLAIR mismatch suggest?

The infarct is likely older than 24 hours There is a pseudo-restriction artifact The infarct is likely within the last 4.5 hours, making IV tPA potentially appropriate The lesion is hemorrhagic rather than ischemic

Correct Answer:

The infarct is likely within the last 4.5 hours, making IV tPA potentially appropriate

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