Latchaw R E, Silva P, Falcone S F
Department of Radiology, University of Miami School of Medicine, Miami, Florida 33136, USA.
Neuroimaging Clin N Am. 1997 Nov;7(4):693-708.
Computed tomography is a highly effective method of detecting subarachnoid blood if performed early after aneurysmal rupture, being 95% to 98% positive when lumbar puncture is positive. The localization of the blood defines the location of the aneurysm in approximately 80% of cases. Contrast enhanced computed tomography demonstrates the aneurysm in 75% of cases with the aneurysm is greater than 5 millimeters in size. Computed tomography angiography defines the aneurysm in up to 96% of cases. The amount of subarachnoid blood correlates with the development of vasospasm; cerebral perfusion can be further evaluated with xenon-enhanced computed tomography.
计算机断层扫描是一种在动脉瘤破裂后早期进行蛛网膜下腔出血检测的高效方法，当腰椎穿刺呈阳性时，其阳性率为95%至98%。在大约80%的病例中，血液的定位可确定动脉瘤的位置。对比增强计算机断层扫描在75%的动脉瘤大小大于5毫米的病例中可显示出动脉瘤。计算机断层扫描血管造影在高达96%的病例中可明确动脉瘤。蛛网膜下腔出血量与血管痉挛的发生相关；可通过氙增强计算机断层扫描进一步评估脑灌注情况。
