• Matthew L Wong, Elisa N Flower, and Jonathan A Edlow.
• Department of Emergency Medicine, Beth Israel Deaconess Medical Center, Boston, Massachusetts; Harvard Medical School, Boston, Massachusetts.
• J Emerg Med. 2020 Feb 1; 58 (2): 260-268.

BackgroundBrain noncontrast computed tomography (CT), CT angiography, and magnetic resonance imaging have been used clinically for decades, and emergency physicians have a good understanding of their indications, the meaning of their results, and some facility with the interpretation of CT. However, brain CT perfusion (CTP) is relatively new and emergency physicians are less familiar with its basic concepts, indications, and role in managing patients with neurological emergencies.ObjectiveWe will review the parameters of clinical interest on a CTP report, and how to incorporate them into clinical decision-making.DiscussionEndovascular therapies paired with CTP have opened up a new frontier in stroke management for severely debilitated stroke patients. It is important for emergency physicians to have an understanding of CTP and how to use it clinically.ConclusionTaking care of patients with large-vessel occlusions is multidisciplinary, and emergency physicians need to understand CTP imaging and its clinical utility.Copyright © 2019 Elsevier Inc. All rights reserved.

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