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Related Experiment Videos

Prospective MR signal-based cardiac triggering.

S S Vasanawala1, T S Sachs, J H Brittain

  • 1Department of Electrical Engineering, Stanford University, CA 94305-9510, USA. vasanawala@stanford.edu

Magnetic Resonance in Medicine
|July 10, 1999
PubMed
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This study introduces a novel cardiac motion compensation method using magnetic resonance imaging (MRI) triggering. It accurately infers cardiac phase from aortic blood velocity for enhanced coronary artery imaging.

Area of Science:

  • Medical Imaging
  • Cardiovascular Technology
  • Biomedical Engineering

Background:

  • Cardiac motion significantly degrades the quality of magnetic resonance imaging (MRI) data.
  • Accurate cardiac phase detection is crucial for motion compensation in cardiovascular MRI.
  • Existing triggering methods may have limitations in speed and flexibility.

Purpose of the Study:

  • To develop and validate a novel cardiac motion compensation method for MRI using MR signal-based triggering.
  • To enable real-time cardiac phase inference and triggering for improved image acquisition.
  • To demonstrate the efficacy of the method in coronary artery imaging.

Main Methods:

  • Interlacing a dedicated triggering pulse sequence with an imaging sequence.

Related Experiment Videos

  • Measuring aortic blood velocity within the triggering sequence to infer cardiac phase.
  • Real-time processing of triggering data using a scanner's signal-processing unit or an external workstation.
  • Utilizing a graphical user interface for instantaneous modification of triggering parameters.

    • Main Results:

    • Successful inference of cardiac phase from measured aortic blood velocity.
    • Demonstration of effective cardiac motion compensation in coronary artery imaging.
    • Compatibility with both conventional 2D Fourier Transform and spiral MRI trajectories.

    Conclusions:

    • The proposed MR signal-based triggering method provides accurate cardiac phase detection for motion compensation.
    • This technique enhances the quality and diagnostic utility of cardiovascular MRI, particularly for coronary arteries.
    • The flexible and real-time adaptable nature of the method offers significant advantages for clinical applications.