一种用于用Intravoxel不连贯运动用MRI成像缺血半阴影的方法
Mira M Liu1, Niloufar Saadat1, Steven P Roth1
1From the Department of Radiology, Medical Physics (MML, TJC), Department of Interventional Radiology (NS, GAC), Department of Surgery and Large Animal Studies (MAN), and the Department of Statistics (MG), University of Chicago, Chicago, IL, USA; Department of Anesthesiology (SPR), University of Illinois, Chicago, IL, USA; Department of Radiology (MSS), University of Massachusetts Chan Medical School, Worcester, MA, USA; Department of Radiology, Biomedical Engineering and Imaging Institute (Current affiliation MML), Icahn School of Medicine at Mount Sinai, New York, NY, USA; Mount Carmel Health Systems (Current affiliation GAC), Columbus, OH, USA.
素不连贯运动MRI (IVIM) 局部脑血流 (局部-qCBF) 显示与DSC局部-qCBF有很强的相关性,并预测心脏病发作的增长. 这种非对比的IVIM方法可以改善急性缺血性中风的评估.
科学领域:
- 神经学 神经学
- 放射学 放射学是一门学科.
- 医疗成像医学成像
背景情况:
- 在急性缺血性中风中,评估局部大脑血流 (CBF) 远离闭塞对于预测心脏病发作和治疗反应至关重要.
- 具有局部动脉输入函数 (AIF) 的动态敏感性对比 (DSC) MRI 测量局部-qCBF,并反映了附带供应.
- 内素不连贯运动 (IVIM) MRI 为测量局部-qCBF提供了一个潜在的非对比替代方案.
研究的目的:
- 为了比较IVIM局部-qCBF与DSC局部-qCBF在缺血半阴.
- 为了比较输液加权成像/扩散加权成像 (PWI/DWI) 不匹配测量.
- 为了确定局部-qCBF是否可以改善预测最终心脏病发作体积.
主要方法:
- 进行了八项临床前犬类中脑动脉封闭实验.
- 通过IVIM,DSC和DWI的MRI,在闭塞后2.5小时获得.
- 对IVIM和DSC参数进行了比较,包括局部qCBF,并与2.5小时和4小时测量的心脏病发作体积相关联.
主要成果:
- 在非心脏病发作地区,IVIM局部qCBF与DSC局部qCBF有很强的相关性 (R2=0.69).
- IVIM和DSC局部qCBF都强烈预测了最终心脏病发作体积 (R2=0.61和R2=0.78,分别).
- IVIM PWI/DWI比率与心脏病发作的增长相关 (R2=0.70).
结论:
- 在评估抵押品流通方面,局部-qCBF的非对比IVIM测量显示出有希望.
- IVIM局部-qCBF和PWI/DWI不匹配可能会提高急性缺血性中风中心脏病增长的预测.
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