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Related Experiment Video

Updated: Oct 13, 2025

A Magnetic Resonance Imaging-based Computational Protocol for Analysis of Plaque Morphology and Hemodynamics in Patients with Carotid Artery Stenosis
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Pressure Difference Estimation in Non-stenotic Carotid Bifurcation Phantoms Using Vector Flow Imaging.

Tin-Quoc Nguyen1, Marie Sand Traberg2, Jacob Bjerring Olesen3

  • 1Department of Diagnostic Radiology, Rigshospitalet, Copenhagen, Denmark; Department of Clinical Medicine, University of Copenhagen, Copenhagen, Denmark.

Ultrasound in Medicine & Biology
|November 12, 2021
PubMed
Summary

Vector Flow Imaging (VFI) accurately estimates pressure differences in carotid bifurcations, outperforming direct catheterization in phantom studies. This non-invasive technique shows promise for clinical applications.

Keywords:
Carotid bifurcationComputational fluid dynamicsFluid-filled pressure catheterFluid–structure interactionPressure difference estimationUltrasoundVector flow imaging

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Area of Science:

  • Biomedical Engineering
  • Fluid Dynamics
  • Medical Imaging

Background:

  • Accurate measurement of local pressure differences is crucial for understanding hemodynamics, particularly at vascular bifurcations.
  • Current methods like direct catheterization have limitations in precision and repeatability.

Purpose of the Study:

  • To compare the accuracy and reliability of Vector Flow Imaging (VFI) against direct catheterization for estimating pressure differences in carotid bifurcation phantoms.
  • To assess the feasibility of VFI for in vivo pressure difference measurements.

Main Methods:

  • Seven carotid bifurcation phantoms were used to compare VFI and direct catheterization against simulated pressure fields.
  • Repeated measurements were performed to evaluate the standard deviation (SD) for both methods.

Main Results:

  • VFI demonstrated strong correlation with simulated peak pressure differences (r = 0.99), with a slight overestimation.
  • The catheter method showed no significant correlation with simulated pressure differences (r = -0.09).
  • VFI exhibited low variability (SD = 8.4%) in repeated measurements, unlike the catheter method (SD = 785.6%).

Conclusions:

  • Vector Flow Imaging is a feasible and accurate method for estimating local pressure differences in carotid bifurcations.
  • VFI offers superior reliability and precision compared to direct catheterization for hemodynamic assessment.
  • The study supports the potential of VFI for non-invasive in vivo pressure difference measurements.