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Real-time interactive color flow MR imaging.

S J Riederer1, R C Wright, R L Ehman

  • 1Magnetic Resonance Laboratory, Mayo Clinic, Rochester, MN 55905.

Radiology
|October 1, 1991
PubMed
Summary
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This study introduces real-time interactive color flow magnetic resonance (MR) imaging, enabling simultaneous visualization of blood flow and anatomical structures. The technique offers interactive parameter adjustment for enhanced diagnostic capabilities.

Area of Science:

  • Medical Imaging
  • Biophysics
  • Cardiovascular Imaging

Background:

  • Assessing blood flow dynamics is crucial for diagnosing cardiovascular diseases.
  • Current imaging techniques may have limitations in real-time visualization and interactivity.
  • Magnetic Resonance (MR) imaging offers high soft-tissue contrast but requires advancements for dynamic flow assessment.

Purpose of the Study:

  • To develop and validate a real-time interactive color flow magnetic resonance (MR) imaging technique.
  • To enable simultaneous display of anatomical information and blood flow velocity.
  • To compare the performance of this novel MR technique with established duplex color ultrasound.

Main Methods:

  • Utilized gradient echoes with a 12-msec repetition time for continuous acquisition of flow-compensated (FC) and flow-encoded (FE) images.

Related Experiment Videos

  • Reconstructed images within 200 msec, displaying FC magnitude in grayscale.
  • Encoded velocity-induced phase differences in color, superimposed on the grayscale FC image for simultaneous magnitude and phase information.

    • Main Results:

    • Demonstrated successful real-time acquisition and display of color flow MR images.
    • Validated the method through experimental phantom and in vivo human studies.
    • Showcased interactive adjustment of acquisition parameters during data acquisition.

    Conclusions:

    • Real-time interactive color flow MR imaging provides simultaneous visualization of flow and anatomy.
    • The technique offers interactive control, enhancing its clinical utility.
    • This MR method presents a viable alternative or complement to duplex color ultrasound for flow imaging.