Pencil excitation with interleaved Fourier velocity encoding: NMR measurement of aortic distensibility

Christopher J. Hardy, Bradley D. Bolster, Elliot R. McVeigh, Icko E.T. Iben, Elias A. Zerhouni

Research output: Contribution to journalArticlepeer-review

Abstract

A technique is presented for rapidly and noninvasively determining aortic distensibility, by NMR measurement of pulse-wave velocity in the aorta. A cylinder of magnetization is excited along the aorta, with Fourier-velocity encoding and readout gradients applied along the cylinder axis. Cardiac gating and data interleaving improve the effective time resolution to as high as 3 ms. Wave velocities are determined from the position of the foot of the flow wave in the velocity profiles. Evidence of helical flow distal to the aortic arch can be seen in normal subjects, while disturbed flow patterns are visible in patients with aneurysms and dissections.

Original languageEnglish (US)
Pages (from-to)814-819
Number of pages6
JournalMagnetic resonance in medicine
Volume35
Issue number6
DOIs
StatePublished - Jun 1996

Keywords

  • aortic distensibility
  • blood velocity
  • magnetic resonance imaging
  • wave speed

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging

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