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Related Experiment Videos

Quantitative magnetic resonance flow imaging

N J Pelc1, F G Sommer, K C Li

  • 1Department of Radiology, Richard M. Lucas Center for Magnetic Resonance Imaging and Spectroscopy, Stanford University, California 94305-5488.

Magnetic Resonance Quarterly
|September 1, 1994
PubMed
Summary
This summary is machine-generated.

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Phase contrast magnetic resonance imaging offers quantitative vascular measurements. Careful application yields accurate flow data for diagnosing various conditions.

Area of Science:

  • Medical Imaging
  • Cardiovascular Science
  • Biophysics

Background:

  • Magnetic resonance (MR) imaging utilizes time-of-flight and phase shift methods for vascular imaging.
  • Phase contrast (PC) MR is particularly adept at quantitative velocity and volume flow rate measurements.

Purpose of the Study:

  • To detail the principles and applications of phase contrast MR for vascular flow quantification.
  • To discuss factors affecting accuracy and reproducibility in PC MR flow measurements.
  • To highlight the clinical utility of PC MR in diagnosing and managing cardiovascular conditions.

Main Methods:

  • Encoding through-plane velocity into phase shift for flow measurement.
  • Integrating measured velocity over the vessel lumen to compute flow.

Related Experiment Videos

  • Utilizing adjustable flow sensitivity for a wide dynamic range (exceeding 10^5).

    • Main Results:

    • PC MR enables quantitative assessment of blood flow velocity and volume.
    • Accuracy can be influenced by acceleration, eddy currents, partial volume effects, and motion.
    • Reproducibility is dependent on signal-to-noise ratio and consistent vessel boundary definition.

    Conclusions:

    • Phase contrast MR provides valuable in vivo quantitative flow data with careful implementation.
    • Rapid imaging techniques mitigate motion artifacts, improving data acquisition.
    • PC MR is a crucial tool for diagnosing and managing diverse vascular conditions.