The role of CT following aneurysmal rupture.
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.
Latchaw
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Department of Radiology, University of Miami School of Medicine, Miami, Florida 33136, USA.
Silva
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Falcone
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SF
D017542:Aneurysm, Ruptured / Q000000981:diagnostic imaging*; D002533:Cerebral Angiography; D002560:Cerebrovascular Circulation; D003287:Contrast Media; D006801:Humans; D002532:Intracranial Aneurysm / Q000000981:diagnostic imaging*; D002546:Ischemic Attack, Transient / Q000000981:diagnostic imaging; D011856:Radiographic Image Enhancement; D012680:Sensitivity and Specificity; D013129:Spinal Puncture; D013345:Subarachnoid Hemorrhage / Q000000981:diagnostic imaging*; D014057:Tomography, X-Ray Computed; D014978:Xenon
D003287:Contrast Media; D014978:Xenon