...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>American Journal of Neuroradiology >Comparison of Pre- and Postcontrast 3D Time-of-Flight MR Angiography for the Evaluation of Distal Intracranial Branch Occlusions in Acute Ischemic Stroke
【24h】

Comparison of Pre- and Postcontrast 3D Time-of-Flight MR Angiography for the Evaluation of Distal Intracranial Branch Occlusions in Acute Ischemic Stroke

机译：对比造影前后3D飞行时间MR血管造影对急性缺血性卒中远端颅内分支闭塞的评估

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

BACKGROUND AND PURPOSE: Three-dimensional time-of-flight (TOF) MR angiography is used routinely in stroke workup to detect arterial occlusions, but a major drawback is its inadequate depiction of vessels with slow or in-plane flow. We hypothesized that the use of contrast-enhanced MR angiography improves delineation of vessels with diminished or absent flow on precontrast MR angiograms. METHODS: Pre- and postcontrast 3D TOF MR angiograms were acquired in 55 consecutive patients with acute stroke. Patency of 480 intracranial vessels was assessed on both the pre- and postcontrast angiograms. Diffusion-weighted (DW) and perfusion-weighted (PW) imaging data were also obtained and results correlated with those of pre- and postcontrast MR angiography. RESULTS: For 50 abnormal vessel segments seen on precontrast MR angiograms, postcontrast MR angiograms resulted in change in the vascular signal intensity in 70% (35 vessel segments); 94% of these changes showed a greater extent of vessel patency. Venous and soft-tissue contrast enhancement had no effect on assessment in 95% of all 480 vessels examined. Interobserver reliability was moderate, with postcontrast interpretation ( = 0.48) showing a slight improvement over precontrast interpretation ( = 0.41). Good agreement was found between the TOF results and the pooled DW and PW imaging results. CONCLUSIONS: Compared with precontrast 3D TOF MR angiograms, postcontrast 3D TOF angiograms improve assessment of intracranial vessel patency in acutely ischemic vascular territories. In some patients, an improved understanding of acute ischemic stroke was obtained by viewing the pre- and postcontrast images. Postcontrast MR angiography should be included in the MR evaluation of acute stroke.
机译：背景与目的：卒中检查中通常使用三维飞行时间（TOF） MR血管造影来检测 动脉闭塞，但主要缺点是其 sup> sup> 描述缓慢或平面流动的容器。我们假设 使用造影剂增强型MR血管造影术可以改善造影前MR 血管造影上血流减少或缺失的血管的轮廓 。 / sup>方法：连续55例急性中风患者在对比前和对比后3D TOF MR血管造影。在 造影前和造影后评估480 颅内血管的通畅性。还获得了扩散加权（DW）和灌注加权（PW） 成像数据，并且结果与 造影前后对比的MR血管造影相关。 MR血管造影上看到的50个异常血管段，造影后MR血管造影导致70％（35个血管段）的血管信号强度发生变化。 sup> 94％的变化显示了更大程度的血管通畅。 静脉和软组织对比增强对95％的 评估没有影响检查了480艘船。 Interobserver 的可靠性中等，对比后解释（ = 0.48）略高于对比前解释 （= 0.41）。 TOF结果 与合并的DW和PW成像结果之间发现了很好的一致性。结论：与对比前3D TOF MR血管造影照片相比，对比前3D TOF MR血管造影照片， TOF血管造影可以改善急性缺血性血管区域颅内血管通畅性的评估。在某些患者中，通过查看对比前后的图像，可以更好地理解急性缺血性卒中。 造影后 MR血管造影应包括在急性 中风的MR评估中。

著录项

  • 来源
    《American Journal of Neuroradiology》 |2002年第4期|557-567|共11页
  • 作者

    Janice J. Yang; Michael D. Hill; William F. Morrish; Mark E. Hudon; Philip A. Barber; Andrew M. Demchuk; Robert J. Sevick; Richard Frayne;

  • 作者单位

    From the Seaman Family MR Research Centre, Foothills Medical Centre, Calgary Health Region (all authors);

    From the Seaman Family MR Research Centre, Foothills Medical Centre, Calgary Health Region (all authors)|Department of Radiology (W.F.M., M.E.H., R.J.S., R.F.) University of Calgary;

    From the Seaman Family MR Research Centre, Foothills Medical Centre, Calgary Health Region (all authors)|Department of Radiology (W.F.M., M.E.H., R.J.S., R.F.) University of Calgary;

    From the Seaman Family MR Research Centre, Foothills Medical Centre, Calgary Health Region (all authors)|Department of Radiology (W.F.M., M.E.H., R.J.S., R.F.) University of Calgary;

    From the Seaman Family MR Research Centre, Foothills Medical Centre, Calgary Health Region (all authors)|Departments of Clinical Neurosciences (M.D.H., P.A.B., A.M.D., R.J.S., R.F.) University of Calgary;

    From the Seaman Family MR Research Centre, Foothills Medical Centre, Calgary Health Region (all authors)|Departments of Clinical Neurosciences (M.D.H., P.A.B., A.M.D., R.J.S., R.F.) University of Calgary;

    From the Seaman Family MR Research Centre, Foothills Medical Centre, Calgary Health Region (all authors)|Departments of Clinical Neurosciences (M.D.H., P.A.B., A.M.D., R.J.S., R.F.) University of Calgary;

    From the Seaman Family MR Research Centre, Foothills Medical Centre, Calgary Health Region (all authors)|Department of Radiology (W.F.M., M.E.H., R.J.S., R.F.) University of Calgary;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号