Advanced Neuroimaging for Acute Stroke and Subarachnoid Hemmorage: What is the Role of CTA, CTP, and

Advanced Neuroimaging for Acute Stroke and Subarachnoid Hemmorage: What is the Role of CTA, CTP, and
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CT angiography (CTA), CT perfusion (CTP), and MR scanning are increasingly available for the evaluation of acute stroke patients. As neurologists and radiologists progressively recommend the use of this technology, emergency physicians need to understand its limitations. Are CTA, CTP, and MR more accurate than non-contrast CT for detecting stroke and determining its extent? Has the reproducibility of perfusion CT and MR sequences been adequately validated? What data supports the ability of these modalities to distinguish the irreversibly infarcted brain from brain tissue that may be salvageable with reperfusion therapy? Can CTA or CTP parameters help predict the likelihood of hemorrhagic transformation of an ischernic stroke or growth of a hemorrhagic stroke? The speaker will provide answers to these difficult questions and more.

  • Provide an overview of the acquisition and derivation of CTA, CTP, and MR images and the concept of the ischemic penumbra.
  • Incorporate the concept of the ischemic penumbra into practice to improve quality of care to stroke patients.
  • Discuss CTP and MR parameters that suggest infarction or hemorrhage.
  • Discuss CTP and MR parameters that suggest ischemic penumbra to increase the efficiency of communications with radiology and neurology consultants.
Andrew W. Asimos, MD, FACEP


Advanced Neuroimaging for Acute Stroke and Subarachnoid Hemmorage: What is the Role of CTA, CTP, and