Konstas A A, Goldmakher G V, Lee T-Y, Lev M H
Department of Radiology, Massachusetts General Hospital, Boston, MA 02114, USA.
AJNR Am J Neuroradiol. 2009 May;30(5):885-92. doi: 10.3174/ajnr.A1492. Epub 2009 Mar 19.
CT perfusion (CTP) is a functional imaging technique that provides important information about capillary-level hemodynamics of the brain parenchyma and is a natural complement to the strengths of unenhanced CT and CT angiography in the evaluation of acute stroke, vasospasm, and other neurovascular disorders. CTP is critical in determining the extent of irreversibly infarcted brain tissue (infarct "core") and the severely ischemic but potentially salvageable tissue ("penumbra"). This is achieved by generating parametric maps of cerebral blood flow, cerebral blood volume, and mean transit time.
CT灌注成像（CTP）是一种功能成像技术，可提供有关脑实质毛细血管水平血流动力学的重要信息，是平扫CT和CT血管造影在评估急性中风、血管痉挛及其他神经血管疾病时优势的自然补充。CTP对于确定不可逆梗死脑组织（梗死“核心”）以及严重缺血但可能挽救的组织（“半暗带”）的范围至关重要。这是通过生成脑血流量、脑血容量和平均通过时间的参数图来实现的。
