en
Scientific article
Review
English

Measurement of pulsatile motion with millisecond resolution by MRI

Published inMagnetic resonance in medicine, vol. 67, no. 6, p. 1787-1793
Publication date2012
Abstract

We investigated a technique based on phase-contrast cine MRI combined with deconvolution of the phase shift waveforms to measure rapidly varying pulsatile motion waveforms. The technique does not require steady-state displacement during motion encoding. Simulations and experiments were performed in porcine liver samples in view of a specific application, namely the observation of transient displacements induced by acoustic radiation force. Simulations illustrate the advantages and shortcomings of the methods. For experimental validation, the waveforms were acquired with an ultrafast ultrasound scanner (Supersonic Imagine Aixplorer), and the rates of decay of the waveforms (relaxation time) were compared. With bipolar motion-encoding gradient of 8.4 ms, the method was able to measure displacement waveforms with a temporal resolution of 1 ms over a time course of 40 ms. Reasonable agreement was found between the rate of decay of the waveforms measured in ultrasound (2.8 ms) and in MRI (2.7-3.3 ms).

Keywords
  • Algorithms
  • Animals
  • Elastic Modulus/physiology
  • Elasticity Imaging Techniques/methods
  • Image Enhancement/methods
  • Image Interpretation, Computer-Assisted/methods
  • Liver/physiology
  • Magnetic Resonance Imaging/methods
  • Movement/physiology
  • Pulsatile Flow/physiology
  • Reproducibility of Results
  • Sensitivity and Specificity
  • Swine
  • Viscosity
Citation (ISO format)
SOUCHON, Rémi et al. Measurement of pulsatile motion with millisecond resolution by MRI. In: Magnetic resonance in medicine, 2012, vol. 67, n° 6, p. 1787–1793. doi: 10.1002/mrm.23134
Main files (1)
Article (Published version)
accessLevelRestricted
Identifiers
ISSN of the journal0740-3194
521views
0downloads

Technical informations

Creation11/24/2014 4:32:00 PM
First validation11/24/2014 4:32:00 PM
Update time03/14/2023 10:27:21 PM
Status update03/14/2023 10:27:21 PM
Last indexation01/16/2024 3:12:57 PM
All rights reserved by Archive ouverte UNIGE and the University of GenevaunigeBlack