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Echocardiography plays a role in assessing cardiac health and detecting heart conditions, with various types providing critical insights for diagnosis and treatment.
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Related Experiment Video

Updated: Aug 24, 2025

In vitro Assessment of Aortic Regurgitation Using Four-Dimensional Flow Magnetic Resonance Imaging
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Highly Accelerated Compressed-Sensing 4D Flow for Intracardiac Flow Assessment.

Akos Varga-Szemes1, Moritz Halfmann2,3, U Joseph Schoepf1

  • 1Division of Cardiovascular Imaging, Department of Radiology and Radiological Science, Medical University of South Carolina, Charleston, South Carolina.

Journal of Magnetic Resonance Imaging : JMRI
|October 20, 2022
PubMed
Summary

Compressed sensing (CS) significantly reduces four-dimensional (4D) flow MRI acquisition time. While feasible for analyzing intracardiac flow and diastolic function, CS shows a slight underestimation of flow measurements.

Keywords:
4D flow MRIcompressed sensingintracardiac flowphase-contrast MRI

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Area of Science:

  • Cardiovascular Imaging
  • Medical Physics
  • Radiology

Background:

  • Four-dimensional (4D) flow MRI enables quantification of complex blood flow patterns.
  • Clinical application of 4D flow MRI is hindered by long scan times.
  • Compressed sensing (CS) is an acceleration technique that reduces MRI acquisition duration.

Purpose of the Study:

  • To compare intracardiac flow measurements between conventional and CS-accelerated 4D flow MRI.
  • To evaluate the feasibility of CS-based 4D flow MRI for assessing diastolic function.

Main Methods:

  • Prospective study involving 50 healthy volunteers.
  • Whole-heart 4D flow MRI acquired at 3 Tesla using conventional parallel imaging (factor 3) and CS acceleration (factor 7.7).
  • Postprocessing included valve tracking, quantification of flow volumes and diastolic function parameters (E/A, E/e'), and statistical analysis for agreement and correlation.

Main Results:

  • CS significantly reduced acquisition time (6.7 ± 1.3 min) compared to conventional methods (12.0 ± 1.3 min).
  • Net forward flow measurements showed good correlation (r > 0.81) and agreement (ICCs > 0.89), with CS underestimating flow by 3.3%-8.3%.
  • Diastolic function evaluation demonstrated errors of 3.2%-17.6% for E/A and E/e' parameters between the two techniques.

Conclusions:

  • Highly accelerated 4D flow MRI using CS is feasible for analyzing intracardiac flow patterns and diastolic function.
  • CS-based 4D flow MRI provides a substantial reduction in scan time.
  • A slight underestimation of flow measurements (approximately 10%) was observed with the CS technique.