一种利用二维相位对比磁共振成像（PCMR）速度数据的互相关来测定主动脉脉搏波速度的新方法。
A new method for the determination of aortic pulse wave velocity using cross-correlation on 2D PCMR velocity data.
作者信息
Fielden Samuel W, Fornwalt Brandon K, Jerosch-Herold Michael, Eisner Robert L, Stillman Arthur E, Oshinski John N
机构信息
Department of Radiology, Emory University School of Medicine, Atlanta, Georgia 30322, USA.
出版信息
J Magn Reson Imaging. 2008 Jun;27(6):1382-7. doi: 10.1002/jmri.21387.
PURPOSE
To evaluate the reproducibility of a new multisite axial pulse wave velocity (PWV) measurement technique that makes use of 2D PCMR data and cross-correlation analysis.
MATERIALS AND METHODS
PWV was estimated with MRI in 13 healthy volunteers by a transit-time technique (TT), a multisite technique utilizing 1D PCMR data in the descending aorta (FOOT), and a new multisite axial technique that uses 2D PCMR data over the ascending, transverse, and descending sections of the aorta (2D-XC).
RESULTS
No significant difference was observed between PWV measurements values measured by the three techniques. However, 2D-XC displayed significantly better intertest reproducibility than either the TT or FOOT methodologies. Average percent difference between scans: TT: 15.8% +/- 13.4%, FOOT: 21.3% +/- 16.9%, 2D-XC: 7.72% +/- 4.73%. P = 0.02 for both 2D-XC/TT comparison and 2D-XC/FOOT comparison.
CONCLUSION
2D-XC is a more reproducible method than either the established TT or FOOT methods to estimate the aortic PWV.
目的
评估一种利用二维相位对比磁共振（2D PCMR）数据和互相关分析的新型多部位轴向脉搏波速度（PWV）测量技术的可重复性。
材料与方法
采用磁共振成像（MRI），通过渡越时间技术（TT）、利用降主动脉一维PCMR数据的多部位技术（FOOT）以及一种在升主动脉、横主动脉和降主动脉节段使用二维PCMR数据的新型多部位轴向技术（2D-XC），对13名健康志愿者的PWV进行评估。
结果
三种技术测量的PWV值之间未观察到显著差异。然而，2D-XC显示出比TT或FOOT方法显著更好的测试间可重复性。扫描间平均百分比差异：TT：15.8%±13.4%，FOOT：21.3%±16.9%，2D-XC：7.72%±4.73%。2D-XC/TT比较和2D-XC/FOOT比较的P值均为0.02。
结论
与既定的TT或FOOT方法相比，2D-XC是一种更具可重复性的评估主动脉PWV的方法。
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