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3D Whole-heart Myocardial Tissue Analysis
Published on: April 12, 2017
Whole-heart coronary MRA with 3D affine motion correction using 3D image-based navigation
Markus Henningsson1, Claudia Prieto, Amedeo Chiribiri
1Division of Imaging Sciences & Biomedical Engineering, King's College London, London, UK.
Magnetic Resonance in Medicine
|February 13, 2013
Summary
This study introduces 3D affine motion correction using 3D navigators (3D-NAV) for coronary MR angiography (CMRA). This method achieves 100% scan efficiency with image quality comparable to the current standard, which has only 50% efficiency.
Area of Science:
- Cardiovascular Magnetic Resonance Imaging
- Medical Imaging Physics
- Image Processing and Analysis
Background:
- Respiratory motion significantly degrades image quality in coronary MR angiography (CMRA).
- Current state-of-the-art CMRA relies on 1D translational motion correction and narrow respiratory gating, leading to prolonged scan times (2-3x).
Purpose of the Study:
- To implement and evaluate 3D affine motion correction for Cartesian whole-heart CMRA.
- To utilize 3D navigators (3D-NAV) for motion estimation, enabling data acquisition throughout the entire respiratory cycle.
Main Methods:
- 3D affine transformations were estimated using 3D-NAV acquisitions during steady-state free precession sequence startup.
- These transformations were applied to binned, high-resolution Cartesian image data to correct for inter-bin respiratory motion.
Main Results:
- Quantitative and qualitative analyses revealed no significant difference in image quality compared to the reference method.
- The proposed 3D-NAV and 3D affine correction method achieved 100% scan efficiency.
Conclusions:
- 3D-NAV and 3D affine correction offer a viable alternative for robust motion correction in CMRA.
- This approach significantly improves scan efficiency (100% vs. 50%) while maintaining comparable image quality to existing methods.
