| 陈唯唯,漆剑频,肖明,宋金梅.CT灌注成像对超急性脑梗死半暗带两种判定方法的一致性研究[J].中国医学影像技术,2005,21(2):258~260 |
| CT灌注成像对超急性脑梗死半暗带两种判定方法的一致性研究 |
| Consistency between two methods for penumbra assessment by CT perfusion in hyperacute cerebral ischemia |
| 投稿时间：2004-12-12 修订日期：2005-01-07 |
| DOI： |
| 中文关键词: 超急性脑梗死 体层摄影术,X线计算机 灌注 半暗带 |
| 英文关键词:Hyperacute cerebral ischemia Tomography, X-ray computed Perfusion Penumbra |
| 基金项目: |
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| 摘要点击次数: 2059 |
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| 中文摘要: |
| 目的 探讨CT灌注成像缺血半暗带两种判定方法的一致性。方法 采用GE LightSpeed 16 MSCT对10例超急性脑缺血患者进行CT灌注成像和复查CT。采用两种方法判定半暗带,一种是计算半暗带阈值以判定半暗带(对比法),另一种是将CBV与CBF图上变化不一致的区域判断为半暗带(不匹配法)。结果 半暗带阈值(CBF%)为0.20~0.66,两种方法间一致性系数Kappa (K)为0.7877。ROC曲线显示对比法的诊断效能高于不匹配法。结论 CT灌注成像判定半暗带的两种方法具有较好的一致性。 |
| 英文摘要: |
| Objective To evaluate the consistency between two reported methods for assessing the penumbra in hyperacute cerebral ischemia by CT perfusion. Methods Ten hyperacute cerebral ischemic patients were performed CT perfusion and follow-up scans after a week with a GE Lightspeed 16 MSCT. The penumbra was determined by two methods. The penumbra was determined by threshold value which were calculated by comparison the follow-up scan with CTP results in the contrast method. Another was the mismatch of the CBV and CBF (the mismatch method). Results The threshold value of the penumbra (CBF%) was 0.20-0.66. The consistency coefficient Kappa (K) of the two methods was 0.7877. ROC curve showed that the contrast method had higher diagnostic efficacy than the mismatch method. Conclusion A high consistency was found between the two methods for identifying the penumbra. |
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