脑血流灌注不足是CCCI的主要病理生理机制。目前用于评价脑血流量的方法有CT灌注成像(CTPI)、磁共振灌注加权成像(PWI)、正电子发射性体层显像(PET)、单光子发射性体层扫描(SPECT)、氙气CT-灌注成像(Xe-CT)等。利用CT、MRI等影像学技术可显示CCCI低灌注损伤的范围和程度,早期发现脑缺血,有效避免脑梗死、血管性痴呆的发生。 Cerebral perfusion insufficiency is the main pathophysiological mechanism of CCCI. Current methods for assessing cerebral blood flow include CT perfusion imaging (CTPI), magnetic resonance perfusion weighted imaging (PWI), positron emission tomography (PET), single photon emission tomography (SPECT), xenon CT-perfusion imaging (Xe-CT) and so on. Using CT, MRI and other imaging techniques can show the extent and extent of CCCI hypoperfusion injury, early detection of cerebral ischemia, cerebral infarction and vascular dementia effectively prevent the occurrence.