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Related Experiment Videos

Investigating myocardial motion by MRI using tissue phase mapping.

Bernd Jung1, Michael Markl, Daniela Föll

  • 1Department of Diagnostic Radiology, Medical Physics, University Hospital, Freiburg University, Hugstetterstr.55, 79106 Freiburg, Germany. bernd.jung@uniklinik-freiburg.de

European Journal of Cardio-Thoracic Surgery : Official Journal of the European Association for Cardio-Thoracic Surgery
|March 28, 2006
PubMed
Summary

High-temporal-resolution phase contrast MRI precisely maps detailed myocardial motion, offering new insights into left ventricular performance. This advanced imaging technique reveals complex patterns previously unseen, aiding in understanding cardiac function.

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Area of Science:

  • Cardiovascular Imaging
  • Magnetic Resonance Imaging
  • Cardiac Mechanics

Background:

  • Velocity-encoded phase contrast MRI quantifies regional myocardial wall motion.
  • It offers three-directional velocity vector fields with high spatial and temporal resolution.
  • Unlike echocardiography, it assesses left ventricular performance without limited anatomical or functional coverage.

Purpose of the Study:

  • To demonstrate the detailed assessment of global and regional myocardial motion using phase contrast MRI.
  • To utilize MRI's intrinsic motion sensitivity for quantifying left ventricular velocities.
  • To describe contraction, expansion, rotation, lengthening, and shortening in high spatial and temporal detail.

Main Methods:

  • Phase contrast MRI measurements in 12 healthy volunteers.

Related Experiment Videos

  • Respiratory-gated technique for high temporal resolution (13.8ms).
  • Analysis of regional myocardial motion components (radial, rotational, longitudinal).

    • Main Results:

    • Detailed left ventricular motion patterns, previously unseen with phase contrast MRI, were revealed.
    • Characteristic myocardial motion patterns and distinct radial, rotational, and longitudinal components were detected with high accuracy.
    • Findings align with echocardiography observations, validating the technique's capability.

    Conclusions:

    • High-temporal-resolution phase contrast MRI is promising for investigating myocardial motion.
    • It enhances understanding of cardiac function in normal subjects and patients.
    • The technique may support further validation of cardiac structure models.