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Self-gated cardiac cine MRI.

Andrew C Larson¹, Richard D White, Gerhard Laub

¹Laboratory of Cardiac Energetics, NHLBI, National Institutes of Health, Department of Health and Human Services, Bethesda, Maryland 20892-1061, USA. larsona@nhlbi.nih.gov

Magnetic Resonance in Medicine

|January 6, 2004

Summary

This study introduces a novel self-gated (SG) technique for cardiac magnetic resonance imaging (CMRI). SG methods enable high-resolution cardiac cine imaging without ECG gating, improving efficiency and image quality.

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Area of Science:

Medical Imaging
Cardiovascular Technology
Magnetic Resonance Imaging

Background:

Electrocardiogram (ECG) gating in cardiac magnetic resonance imaging (CMRI) poses challenges.
Real-time CMRI lacks the resolution of segmented techniques, while prior MR signal-based gating reduces efficiency.

Purpose of the Study:

To develop a novel self-gated (SG) acquisition technique for CMRI.
To eliminate efficiency deficits associated with traditional gating methods by extracting synchronization signals from MR data.

Main Methods:

Developed three SG strategies using radial k-space sampling: echo peak magnitude, kymogram, and 2D correlation.
Acquired data from seven healthy volunteers using the proposed SG techniques.

Main Results:

Related Experiment Videos

SG techniques produced cine image series comparable in quality to conventional ECG gating.
No significant differences in image quality were observed between SG and ECG-gated CMRI.

Conclusions:

Self-gated (SG) techniques offer a practical advancement for clinical MRI.
Enable high temporal and spatial resolution cardiac cine imaging without ECG gating and without compromising imaging efficiency.