Contrast-enhanced 4D radial coronary artery imaging at 3.0 T within a single breath-hold

Area of Science:

• Cardiovascular Imaging
• Magnetic Resonance Imaging (MRI)
• Medical Physics

Background:

• Coronary MRI typically requires acquisition during mid-diastole to minimize motion artifacts.
• Individual trigger delay time determination is crucial for optimal image quality but can be challenging.
• Acquiring images throughout the cardiac cycle could resolve these complications.

Purpose of the Study:

• To develop and evaluate a novel 3D cine coronary artery imaging technique using radial sampling at 3 Tesla.
• To achieve high spatial and temporal resolution within a single breath-hold.
• To overcome limitations of traditional coronary MRI acquisition.

Main Methods:

• Utilized a radial sampling technique for 3D cine coronary artery imaging at 3 Tesla.
• Administered an extravascular paramagnetic contrast agent to enhance blood signal intensity.
• Employed parallel data acquisition and interleaved sliding window image reconstruction.

Main Results:

• Successfully acquired 4D coronary artery images in volunteers within a single breath-hold.
• Achieved simultaneous high temporal and spatial resolution.
• Demonstrated the feasibility of the technique for robust coronary artery visualization.

Conclusions:

• The developed radial sampling technique enables high-quality 4D coronary artery imaging.
• This method offers flexibility in postprocessing of 3D image sets.
• It presents a promising alternative for reducing motion artifacts and improving coronary MRI diagnostics.