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J Magn Reson Imaging. 2008 Jun;27(6):1382-7. doi: 10.1002/jmri.21387.

A new method for the determination of aortic pulse wave velocity using cross-correlation on 2D PCMR velocity data.

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  • 1Department of Radiology, Emory University School of Medicine, Atlanta, Georgia 30322, USA.

Abstract

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.

2008 Wiley-Liss, Inc

PMID:
18504758
[PubMed - indexed for MEDLINE]
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