1 MCQs in Radiology for NEET PG
A 58-year-old man with hypertension presents to the emergency department 8 hours after acute onset of left hemiparesis and aphasia. Non-contrast CT head shows no hemorrhage. CT perfusion is performed. The region marked **A** in the diagram shows decreased cerebral blood flow (CBF) with preserved cerebral blood volume (CBV) and prolonged mean transit time (MTT). Which of the following best describes the pathophysiological basis for this perfusion pattern and its clinical significance?
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