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Both raters correctly assessed all trunk occlusions of the basilar artery (n=4),the internal carotid artery(n=4),and the middle cerebral artery(n= 9).The chance adjusted interrater agreement was k=.78.The assessment of branch occlusions of the middle cerebral artery was less reliable.The agreement rate in judging the collateral state in 17 occlusions in the anterior cerebral circulation was 88%.The size of 21(62%)of 34 hemispheric infarctions was predicted correctly.CT angiography quickly and reliably adds important information to conventional CT studies in cases of acute ischemic stroke.It shows the site of occlusion,the length of the occluded anterial segment,and the contrast-enhanced arteries beyond the occlusion as an estimate of collateral blood flow. |
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basilar artery occlusion
carotid artery occlusion,intracranial
CAT scan
CAT scan,abnormal
CAT scan,angiography
CAT scan,contrast enhanced
CAT scan,early changes in CVA
cerebral infarction
cerebral vasculature
cerebrovascular accident
collateral circulation
middle cerebral artery,occlusion of
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